如何将sys.stdout复制到日志文件？

#1 楼

# Note this version was written circa Python 2.6, see below for
# an updated 3.3+-compatible version.
import subprocess, os, sys

# Unbuffer output (this ensures the output is in the correct order)
sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)

tee = subprocess.Popen(["tee", "log.txt"], stdin=subprocess.PIPE)
os.dup2(tee.stdin.fileno(), sys.stdout.fileno())
os.dup2(tee.stdin.fileno(), sys.stderr.fileno())

print "\nstdout"
print >>sys.stderr, "stderr"
os.spawnve("P_WAIT", "/bin/ls", ["/bin/ls"], {})
os.execve("/bin/ls", ["/bin/ls"], os.environ)

import subprocess, os, sys

tee = subprocess.Popen(["tee", "log.txt"], stdin=subprocess.PIPE)
# Cause tee's stdin to get a copy of our stdin/stdout (as well as that
# of any child processes we spawn)
os.dup2(tee.stdin.fileno(), sys.stdout.fileno())
os.dup2(tee.stdin.fileno(), sys.stderr.fileno())

# The flush flag is needed to guarantee these lines are written before
# the two spawned /bin/ls processes emit any output
print("\nstdout", flush=True)
print("stderr", file=sys.stderr, flush=True)

# These child processes' stdin/stdout are 
os.spawnve("P_WAIT", "/bin/ls", ["/bin/ls"], {})
os.execve("/bin/ls", ["/bin/ls"], os.environ)

#2 楼

class Tee(object):
    def __init__(self, name, mode):
        self.file = open(name, mode)
        self.stdout = sys.stdout
        sys.stdout = self
    def __del__(self):
        sys.stdout = self.stdout
        self.file.close()
    def write(self, data):
        self.file.write(data)
        self.stdout.write(data)
    def flush(self):
        self.file.flush()

#3 楼

import sys

class Logger(object):
    def __init__(self):
        self.terminal = sys.stdout
        self.log = open("log.dat", "a")

    def write(self, message):
        self.terminal.write(message)
        self.log.write(message)  

sys.stdout = Logger()

# prints "1 2" to <stdout> AND log.dat
print "%d %d" % (1,2)

#4 楼

#5 楼

import sys

class multifile(object):
    def __init__(self, files):
        self._files = files
    def __getattr__(self, attr, *args):
        return self._wrap(attr, *args)
    def _wrap(self, attr, *args):
        def g(*a, **kw):
            for f in self._files:
                res = getattr(f, attr, *args)(*a, **kw)
            return res
        return g

# for a tee-like behavior, use like this:
sys.stdout = multifile([ sys.stdout, open('myfile.txt', 'w') ])

# all these forms work:
print 'abc'
print >>sys.stdout, 'line2'
sys.stdout.write('line3\n')

#6 楼

import logging

logging.basicConfig(level=logging.DEBUG, filename='mylog.log')
logging.info('this should to write to the log file')

#7 楼

#8 楼

import sys, os

class Logger(object):
    "Lumberjack class - duplicates sys.stdout to a log file and it's okay"
    #source: https://stackoverflow.com/q/616645
    def __init__(self, filename="Red.Wood", mode="a", buff=0):
        self.stdout = sys.stdout
        self.file = open(filename, mode, buff)
        sys.stdout = self

    def __del__(self):
        self.close()

    def __enter__(self):
        pass

    def __exit__(self, *args):
        self.close()

    def write(self, message):
        self.stdout.write(message)
        self.file.write(message)

    def flush(self):
        self.stdout.flush()
        self.file.flush()
        os.fsync(self.file.fileno())

    def close(self):
        if self.stdout != None:
            sys.stdout = self.stdout
            self.stdout = None

        if self.file != None:
            self.file.close()
            self.file = None

with Logger('My_best_girlie_by_my.side'):
    print("we'd sing sing sing")

Log=Logger('Sleeps_all.night')
print('works all day')
Log.close()

#9 楼

import os
import sys
import logging
from optparse import OptionParser

def initialize_logging(options):
    """ Log information based upon users options"""

    logger = logging.getLogger('project')
    formatter = logging.Formatter('%(asctime)s %(levelname)s\t%(message)s')
    level = logging.__dict__.get(options.loglevel.upper(),logging.DEBUG)
    logger.setLevel(level)

    # Output logging information to screen
    if not options.quiet:
        hdlr = logging.StreamHandler(sys.stderr)
        hdlr.setFormatter(formatter)
        logger.addHandler(hdlr)

    # Output logging information to file
    logfile = os.path.join(options.logdir, "project.log")
    if options.clean and os.path.isfile(logfile):
        os.remove(logfile)
    hdlr2 = logging.FileHandler(logfile)
    hdlr2.setFormatter(formatter)
    logger.addHandler(hdlr2)

    return logger

def main(argv=None):
    if argv is None:
        argv = sys.argv[1:]

    # Setup command line options
    parser = OptionParser("usage: %prog [options]")
    parser.add_option("-l", "--logdir", dest="logdir", default=".", help="log DIRECTORY (default ./)")
    parser.add_option("-v", "--loglevel", dest="loglevel", default="debug", help="logging level (debug, info, error)")
    parser.add_option("-q", "--quiet", action="store_true", dest="quiet", help="do not log to console")
    parser.add_option("-c", "--clean", dest="clean", action="store_true", default=False, help="remove old log file")

    # Process command line options
    (options, args) = parser.parse_args(argv)

    # Setup logger format and output locations
    logger = initialize_logging(options)

    # Examples
    logger.error("This is an error message.")
    logger.info("This is an info message.")
    logger.debug("This is a debug message.")

if __name__ == "__main__":
    sys.exit(main())

#10 楼

class Tee(object):
    def __init__(self, name, mode):
        self.file = open(name, mode)
        self.stdout = sys.stdout
        sys.stdout = self

    def __del__(self):
        sys.stdout = self.stdout
        self.file.close()

    def write(self, data):
        self.file.write(data)
        self.stdout.write(data)

    def __enter__(self):
        pass

    def __exit__(self, _type, _value, _traceback):
        pass

with Tee('outfile.log', 'w'):
    print('I am written to both stdout and outfile.log')

#11 楼

import logging
import sys

log = logging.getLogger('stdxxx')

class StreamLogger(object):

    def __init__(self, stream, prefix=''):
        self.stream = stream
        self.prefix = prefix
        self.data = ''

    def write(self, data):
        self.stream.write(data)
        self.stream.flush()

        self.data += data
        tmp = str(self.data)
        if '\x0a' in tmp or '\x0d' in tmp:
            tmp = tmp.rstrip('\x0a\x0d')
            log.info('%s%s' % (self.prefix, tmp))
            self.data = ''


logging.basicConfig(level=logging.INFO,
                    filename='text.log',
                    filemode='a')

sys.stdout = StreamLogger(sys.stdout, '[stdout] ')

print 'test for stdout'

#12 楼

#13 楼

 Issue of redirecting the stdout to both file and screen
Gabriel Genellina gagsl-py2 at yahoo.com.ar
Mon May 28 12:45:51 CEST 2007

    Previous message: Issue of redirecting the stdout to both file and screen
    Next message: Formal interfaces with Python
    Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

En Mon, 28 May 2007 06:17:39 -0300, 人言落日是天涯，望极天涯不见家
<kelvin.you at gmail.com> escribió:

> I wanna print the log to both the screen and file, so I simulatered a
> 'tee'
>
> class Tee(file):
>
>     def __init__(self, name, mode):
>         file.__init__(self, name, mode)
>         self.stdout = sys.stdout
>         sys.stdout = self
>
>     def __del__(self):
>         sys.stdout = self.stdout
>         self.close()
>
>     def write(self, data):
>         file.write(self, data)
>         self.stdout.write(data)
>
> Tee('logfile', 'w')
> print >>sys.stdout, 'abcdefg'
>
> I found that it only output to the file, nothing to screen. Why?
> It seems the 'write' function was not called when I *print* something.

You create a Tee instance and it is immediately garbage collected. I'd
restore sys.stdout on Tee.close, not __del__ (you forgot to call the
inherited __del__ method, btw).
Mmm, doesn't work. I think there is an optimization somewhere: if it looks
like a real file object, it uses the original file write method, not yours.
The trick would be to use an object that does NOT inherit from file:

import sys
class TeeNoFile(object):
     def __init__(self, name, mode):
         self.file = open(name, mode)
         self.stdout = sys.stdout
         sys.stdout = self
     def close(self):
         if self.stdout is not None:
             sys.stdout = self.stdout
             self.stdout = None
         if self.file is not None:
             self.file.close()
             self.file = None
     def write(self, data):
         self.file.write(data)
         self.stdout.write(data)
     def flush(self):
         self.file.flush()
         self.stdout.flush()
     def __del__(self):
         self.close()

tee=TeeNoFile('logfile', 'w')
print 'abcdefg'
print 'another line'
tee.close()
print 'screen only'
del tee # should do nothing

--
Gabriel Genellina
 

#14 楼

import logging
import os, sys
import datetime

# Get name of module, use as application name
try:
  ME=os.path.split(__file__)[-1].split('.')[0]
except:
  ME='pyExec_'

LOG_IDENTIFIER="uuu___( o O )___uuu "
LOG_IDR_LENGTH=len(LOG_IDENTIFIER)

class PyExec(object):

  # Use this to capture all possible error / output to log
  class SuperTee(object):
      # Original reference: http://mail.python.org/pipermail/python-list/2007-May/442737.html
      def __init__(self, name, mode):
          self.fl = open(name, mode)
          self.fl.write('\n')
          self.stdout = sys.stdout
          self.stdout.write('\n')
          self.stderr = sys.stderr

          sys.stdout = self
          sys.stderr = self

      def __del__(self):
          self.fl.write('\n')
          self.fl.flush()
          sys.stderr = self.stderr
          sys.stdout = self.stdout
          self.fl.close()

      def write(self, data):
          # If the data to write includes the log identifier prefix, then it is already formatted
          if data[0:LOG_IDR_LENGTH]==LOG_IDENTIFIER:
            self.fl.write("%s\n" % data[LOG_IDR_LENGTH:])
            self.stdout.write(data[LOG_IDR_LENGTH:])

          # Otherwise, we can give it a timestamp
          else:

            timestamp=str(datetime.datetime.now())
            if 'Traceback' == data[0:9]:
              data='%s: %s' % (timestamp, data)
              self.fl.write(data)
            else:
              self.fl.write(data)

            self.stdout.write(data)


  def __init__(self, aName, aCmd, logFileName='', outFileName=''):

    # Using name for 'logger' (context?), which is separate from the module or the function
    baseFormatter=logging.Formatter("%(asctime)s \t %(levelname)s \t %(name)s:%(module)s:%(lineno)d \t %(message)s")
    errorFormatter=logging.Formatter(LOG_IDENTIFIER + "%(asctime)s \t %(levelname)s \t %(name)s:%(module)s:%(lineno)d \t %(message)s")

    if logFileName:
      # open passed filename as append
      fl=logging.FileHandler("%s.log" % aName)
    else:
      # otherwise, use log filename as a one-time use file
      fl=logging.FileHandler("%s.log" % aName, 'w')

    fl.setLevel(logging.DEBUG)
    fl.setFormatter(baseFormatter)

    # This will capture stdout and CRITICAL and beyond errors

    if outFileName:
      teeFile=PyExec.SuperTee("%s_out.log" % aName)
    else:
      teeFile=PyExec.SuperTee("%s_out.log" % aName, 'w')

    fl_out=logging.StreamHandler( teeFile )
    fl_out.setLevel(logging.CRITICAL)
    fl_out.setFormatter(errorFormatter)

    # Set up logging
    self.log=logging.getLogger('pyExec_main')
    log=self.log

    log.addHandler(fl)
    log.addHandler(fl_out)

    print "Test print statement."

    log.setLevel(logging.DEBUG)

    log.info("Starting %s", ME)
    log.critical("Critical.")

    # Caught exception
    try:
      raise Exception('Exception test.')
    except Exception,e:
      log.exception(str(e))

    # Uncaught exception
    a=2/0


PyExec('test_pyExec',None)

#15 楼

import logging
debug = input("Debug or not")
if debug == "1":
    logging.basicConfig(level=logging.DEBUG, filename='./OUT.txt')
    old_print = print
    def print(string):
        old_print(string)
        logging.info(string)
print("OMG it works!")

import logging, sys
debug = input("Debug or not")
if debug == "1":
    old_input = input
    sys.stderr.write = logging.info
    def input(string=""):
        string_in = old_input(string)
        logging.info("STRING IN " + string_in)
        return string_in
    logging.basicConfig(level=logging.DEBUG, filename='./OUT.txt')
    old_print = print
    def print(string="", string2=""):
        old_print(string, string2)
        logging.info(string)
        logging.info(string2)
print("OMG")
b = input()
print(a) ## Deliberate error for testing

#16 楼

class Log(object):

    def __init__(self, path_log, mode="w", encoding="utf-8"):
        h = open(path_log, mode, encoding=encoding)
        sys.stdout = multifile([ sys.stdout, h ])
        sys.stderr = multifile([ sys.stderr, h ])

    def __enter__(self):
        """ Necessary if called by with (or with... as) """
        return self     # only necessary if "as"

    def __exit__(self, type, value, tb):
        """ Necessary if call by with """
        pass

    def __del__(self):
        if sys is not None:
            # restoring
            sys.stdout = sys.__stdout__
            sys.stderr = sys.__stderr__

log = Log("test.txt")
print("line 1")
print("line 2", file=sys.stderr)
del log
print("line 3 only on screen")

#17 楼

import os
import sys
import logging

class StdErrReplament(object):
    """
        How to redirect stdout and stderr to logger in Python
        https://stackoverflow.com/questions/19425736/how-to-redirect-stdout-and-stderr-to-logger-in-python

        Set a Read-Only Attribute in Python?
        https://stackoverflow.com/questions/24497316/set-a-read-only-attribute-in-python
    """
    is_active = False

    @classmethod
    def lock(cls, logger):
        """
            Attach this singleton logger to the `sys.stderr` permanently.
        """
        global _stderr_singleton
        global _stderr_default
        global _stderr_default_class_type

        # On Sublime Text, `sys.__stderr__` is set to None, because they already replaced `sys.stderr`
        # by some `_LogWriter()` class, then just save the current one over there.
        if not sys.__stderr__:
            sys.__stderr__ = sys.stderr

        try:
            _stderr_default
            _stderr_default_class_type

        except NameError:
            _stderr_default = sys.stderr
            _stderr_default_class_type = type( _stderr_default )

        # Recreate the sys.stderr logger when it was reset by `unlock()`
        if not cls.is_active:
            cls.is_active = True
            _stderr_write = _stderr_default.write

            logger_call = logger.debug
            clean_formatter = logger.clean_formatter

            global _sys_stderr_write
            global _sys_stderr_write_hidden

            if sys.version_info <= (3,2):
                logger.file_handler.terminator = '\n'

            # Always recreate/override the internal write function used by `_sys_stderr_write`
            def _sys_stderr_write_hidden(*args, **kwargs):
                """
                    Suppress newline in Python logging module
                    https://stackoverflow.com/questions/7168790/suppress-newline-in-python-logging-module
                """

                try:
                    _stderr_write( *args, **kwargs )
                    file_handler = logger.file_handler

                    formatter = file_handler.formatter
                    terminator = file_handler.terminator

                    file_handler.formatter = clean_formatter
                    file_handler.terminator = ""

                    kwargs['extra'] = {'_duplicated_from_file': True}
                    logger_call( *args, **kwargs )

                    file_handler.formatter = formatter
                    file_handler.terminator = terminator

                except Exception:
                    logger.exception( "Could not write to the file_handler: %s(%s)", file_handler, logger )
                    cls.unlock()

            # Only create one `_sys_stderr_write` function pointer ever
            try:
                _sys_stderr_write

            except NameError:

                def _sys_stderr_write(*args, **kwargs):
                    """
                        Hides the actual function pointer. This allow the external function pointer to
                        be cached while the internal written can be exchanged between the standard
                        `sys.stderr.write` and our custom wrapper around it.
                    """
                    _sys_stderr_write_hidden( *args, **kwargs )

        try:
            # Only create one singleton instance ever
            _stderr_singleton

        except NameError:

            class StdErrReplamentHidden(_stderr_default_class_type):
                """
                    Which special methods bypasses __getattribute__ in Python?
                    https://stackoverflow.com/questions/12872695/which-special-methods-bypasses-getattribute-in-python
                """

                if hasattr( _stderr_default, "__abstractmethods__" ):
                    __abstractmethods__ = _stderr_default.__abstractmethods__

                if hasattr( _stderr_default, "__base__" ):
                    __base__ = _stderr_default.__base__

                if hasattr( _stderr_default, "__bases__" ):
                    __bases__ = _stderr_default.__bases__

                if hasattr( _stderr_default, "__basicsize__" ):
                    __basicsize__ = _stderr_default.__basicsize__

                if hasattr( _stderr_default, "__call__" ):
                    __call__ = _stderr_default.__call__

                if hasattr( _stderr_default, "__class__" ):
                    __class__ = _stderr_default.__class__

                if hasattr( _stderr_default, "__delattr__" ):
                    __delattr__ = _stderr_default.__delattr__

                if hasattr( _stderr_default, "__dict__" ):
                    __dict__ = _stderr_default.__dict__

                if hasattr( _stderr_default, "__dictoffset__" ):
                    __dictoffset__ = _stderr_default.__dictoffset__

                if hasattr( _stderr_default, "__dir__" ):
                    __dir__ = _stderr_default.__dir__

                if hasattr( _stderr_default, "__doc__" ):
                    __doc__ = _stderr_default.__doc__

                if hasattr( _stderr_default, "__eq__" ):
                    __eq__ = _stderr_default.__eq__

                if hasattr( _stderr_default, "__flags__" ):
                    __flags__ = _stderr_default.__flags__

                if hasattr( _stderr_default, "__format__" ):
                    __format__ = _stderr_default.__format__

                if hasattr( _stderr_default, "__ge__" ):
                    __ge__ = _stderr_default.__ge__

                if hasattr( _stderr_default, "__getattribute__" ):
                    __getattribute__ = _stderr_default.__getattribute__

                if hasattr( _stderr_default, "__gt__" ):
                    __gt__ = _stderr_default.__gt__

                if hasattr( _stderr_default, "__hash__" ):
                    __hash__ = _stderr_default.__hash__

                if hasattr( _stderr_default, "__init__" ):
                    __init__ = _stderr_default.__init__

                if hasattr( _stderr_default, "__init_subclass__" ):
                    __init_subclass__ = _stderr_default.__init_subclass__

                if hasattr( _stderr_default, "__instancecheck__" ):
                    __instancecheck__ = _stderr_default.__instancecheck__

                if hasattr( _stderr_default, "__itemsize__" ):
                    __itemsize__ = _stderr_default.__itemsize__

                if hasattr( _stderr_default, "__le__" ):
                    __le__ = _stderr_default.__le__

                if hasattr( _stderr_default, "__lt__" ):
                    __lt__ = _stderr_default.__lt__

                if hasattr( _stderr_default, "__module__" ):
                    __module__ = _stderr_default.__module__

                if hasattr( _stderr_default, "__mro__" ):
                    __mro__ = _stderr_default.__mro__

                if hasattr( _stderr_default, "__name__" ):
                    __name__ = _stderr_default.__name__

                if hasattr( _stderr_default, "__ne__" ):
                    __ne__ = _stderr_default.__ne__

                if hasattr( _stderr_default, "__new__" ):
                    __new__ = _stderr_default.__new__

                if hasattr( _stderr_default, "__prepare__" ):
                    __prepare__ = _stderr_default.__prepare__

                if hasattr( _stderr_default, "__qualname__" ):
                    __qualname__ = _stderr_default.__qualname__

                if hasattr( _stderr_default, "__reduce__" ):
                    __reduce__ = _stderr_default.__reduce__

                if hasattr( _stderr_default, "__reduce_ex__" ):
                    __reduce_ex__ = _stderr_default.__reduce_ex__

                if hasattr( _stderr_default, "__repr__" ):
                    __repr__ = _stderr_default.__repr__

                if hasattr( _stderr_default, "__setattr__" ):
                    __setattr__ = _stderr_default.__setattr__

                if hasattr( _stderr_default, "__sizeof__" ):
                    __sizeof__ = _stderr_default.__sizeof__

                if hasattr( _stderr_default, "__str__" ):
                    __str__ = _stderr_default.__str__

                if hasattr( _stderr_default, "__subclasscheck__" ):
                    __subclasscheck__ = _stderr_default.__subclasscheck__

                if hasattr( _stderr_default, "__subclasses__" ):
                    __subclasses__ = _stderr_default.__subclasses__

                if hasattr( _stderr_default, "__subclasshook__" ):
                    __subclasshook__ = _stderr_default.__subclasshook__

                if hasattr( _stderr_default, "__text_signature__" ):
                    __text_signature__ = _stderr_default.__text_signature__

                if hasattr( _stderr_default, "__weakrefoffset__" ):
                    __weakrefoffset__ = _stderr_default.__weakrefoffset__

                if hasattr( _stderr_default, "mro" ):
                    mro = _stderr_default.mro

                def __init__(self):
                    """
                        Override any super class `type( _stderr_default )` constructor, so we can 
                        instantiate any kind of `sys.stderr` replacement object, in case it was already 
                        replaced by something else like on Sublime Text with `_LogWriter()`.

                        Assures all attributes were statically replaced just above. This should happen in case
                        some new attribute is added to the python language.

                        This also ignores the only two methods which are not equal, `__init__()` and `__getattribute__()`.
                    """
                    different_methods = ("__init__", "__getattribute__")
                    attributes_to_check = set( dir( object ) + dir( type ) )

                    for attribute in attributes_to_check:

                        if attribute not in different_methods \
                                and hasattr( _stderr_default, attribute ):

                            base_class_attribute = super( _stderr_default_class_type, self ).__getattribute__( attribute )
                            target_class_attribute = _stderr_default.__getattribute__( attribute )

                            if base_class_attribute != target_class_attribute:
                                sys.stderr.write( "    The base class attribute `%s` is different from the target class:\n%s\n%s\n\n" % (
                                        attribute, base_class_attribute, target_class_attribute ) )

                def __getattribute__(self, item):

                    if item == 'write':
                        return _sys_stderr_write

                    try:
                        return _stderr_default.__getattribute__( item )

                    except AttributeError:
                        return super( _stderr_default_class_type, _stderr_default ).__getattribute__( item )

            _stderr_singleton = StdErrReplamentHidden()
            sys.stderr = _stderr_singleton

        return cls

    @classmethod
    def unlock(cls):
        """
            Detach this `stderr` writer from `sys.stderr` and allow the next call to `lock()` create
            a new writer for the stderr.
        """

        if cls.is_active:
            global _sys_stderr_write_hidden

            cls.is_active = False
            _sys_stderr_write_hidden = _stderr_default.write



class StdOutReplament(object):
    """
        How to redirect stdout and stderr to logger in Python
        https://stackoverflow.com/questions/19425736/how-to-redirect-stdout-and-stderr-to-logger-in-python

        Set a Read-Only Attribute in Python?
        https://stackoverflow.com/questions/24497316/set-a-read-only-attribute-in-python
    """
    is_active = False

    @classmethod
    def lock(cls, logger):
        """
            Attach this singleton logger to the `sys.stdout` permanently.
        """
        global _stdout_singleton
        global _stdout_default
        global _stdout_default_class_type

        # On Sublime Text, `sys.__stdout__` is set to None, because they already replaced `sys.stdout`
        # by some `_LogWriter()` class, then just save the current one over there.
        if not sys.__stdout__:
            sys.__stdout__ = sys.stdout

        try:
            _stdout_default
            _stdout_default_class_type

        except NameError:
            _stdout_default = sys.stdout
            _stdout_default_class_type = type( _stdout_default )

        # Recreate the sys.stdout logger when it was reset by `unlock()`
        if not cls.is_active:
            cls.is_active = True
            _stdout_write = _stdout_default.write

            logger_call = logger.debug
            clean_formatter = logger.clean_formatter

            global _sys_stdout_write
            global _sys_stdout_write_hidden

            if sys.version_info <= (3,2):
                logger.file_handler.terminator = '\n'

            # Always recreate/override the internal write function used by `_sys_stdout_write`
            def _sys_stdout_write_hidden(*args, **kwargs):
                """
                    Suppress newline in Python logging module
                    https://stackoverflow.com/questions/7168790/suppress-newline-in-python-logging-module
                """

                try:
                    _stdout_write( *args, **kwargs )
                    file_handler = logger.file_handler

                    formatter = file_handler.formatter
                    terminator = file_handler.terminator

                    file_handler.formatter = clean_formatter
                    file_handler.terminator = ""

                    kwargs['extra'] = {'_duplicated_from_file': True}
                    logger_call( *args, **kwargs )

                    file_handler.formatter = formatter
                    file_handler.terminator = terminator

                except Exception:
                    logger.exception( "Could not write to the file_handler: %s(%s)", file_handler, logger )
                    cls.unlock()

            # Only create one `_sys_stdout_write` function pointer ever
            try:
                _sys_stdout_write

            except NameError:

                def _sys_stdout_write(*args, **kwargs):
                    """
                        Hides the actual function pointer. This allow the external function pointer to
                        be cached while the internal written can be exchanged between the standard
                        `sys.stdout.write` and our custom wrapper around it.
                    """
                    _sys_stdout_write_hidden( *args, **kwargs )

        try:
            # Only create one singleton instance ever
            _stdout_singleton

        except NameError:

            class StdOutReplamentHidden(_stdout_default_class_type):
                """
                    Which special methods bypasses __getattribute__ in Python?
                    https://stackoverflow.com/questions/12872695/which-special-methods-bypasses-getattribute-in-python
                """

                if hasattr( _stdout_default, "__abstractmethods__" ):
                    __abstractmethods__ = _stdout_default.__abstractmethods__

                if hasattr( _stdout_default, "__base__" ):
                    __base__ = _stdout_default.__base__

                if hasattr( _stdout_default, "__bases__" ):
                    __bases__ = _stdout_default.__bases__

                if hasattr( _stdout_default, "__basicsize__" ):
                    __basicsize__ = _stdout_default.__basicsize__

                if hasattr( _stdout_default, "__call__" ):
                    __call__ = _stdout_default.__call__

                if hasattr( _stdout_default, "__class__" ):
                    __class__ = _stdout_default.__class__

                if hasattr( _stdout_default, "__delattr__" ):
                    __delattr__ = _stdout_default.__delattr__

                if hasattr( _stdout_default, "__dict__" ):
                    __dict__ = _stdout_default.__dict__

                if hasattr( _stdout_default, "__dictoffset__" ):
                    __dictoffset__ = _stdout_default.__dictoffset__

                if hasattr( _stdout_default, "__dir__" ):
                    __dir__ = _stdout_default.__dir__

                if hasattr( _stdout_default, "__doc__" ):
                    __doc__ = _stdout_default.__doc__

                if hasattr( _stdout_default, "__eq__" ):
                    __eq__ = _stdout_default.__eq__

                if hasattr( _stdout_default, "__flags__" ):
                    __flags__ = _stdout_default.__flags__

                if hasattr( _stdout_default, "__format__" ):
                    __format__ = _stdout_default.__format__

                if hasattr( _stdout_default, "__ge__" ):
                    __ge__ = _stdout_default.__ge__

                if hasattr( _stdout_default, "__getattribute__" ):
                    __getattribute__ = _stdout_default.__getattribute__

                if hasattr( _stdout_default, "__gt__" ):
                    __gt__ = _stdout_default.__gt__

                if hasattr( _stdout_default, "__hash__" ):
                    __hash__ = _stdout_default.__hash__

                if hasattr( _stdout_default, "__init__" ):
                    __init__ = _stdout_default.__init__

                if hasattr( _stdout_default, "__init_subclass__" ):
                    __init_subclass__ = _stdout_default.__init_subclass__

                if hasattr( _stdout_default, "__instancecheck__" ):
                    __instancecheck__ = _stdout_default.__instancecheck__

                if hasattr( _stdout_default, "__itemsize__" ):
                    __itemsize__ = _stdout_default.__itemsize__

                if hasattr( _stdout_default, "__le__" ):
                    __le__ = _stdout_default.__le__

                if hasattr( _stdout_default, "__lt__" ):
                    __lt__ = _stdout_default.__lt__

                if hasattr( _stdout_default, "__module__" ):
                    __module__ = _stdout_default.__module__

                if hasattr( _stdout_default, "__mro__" ):
                    __mro__ = _stdout_default.__mro__

                if hasattr( _stdout_default, "__name__" ):
                    __name__ = _stdout_default.__name__

                if hasattr( _stdout_default, "__ne__" ):
                    __ne__ = _stdout_default.__ne__

                if hasattr( _stdout_default, "__new__" ):
                    __new__ = _stdout_default.__new__

                if hasattr( _stdout_default, "__prepare__" ):
                    __prepare__ = _stdout_default.__prepare__

                if hasattr( _stdout_default, "__qualname__" ):
                    __qualname__ = _stdout_default.__qualname__

                if hasattr( _stdout_default, "__reduce__" ):
                    __reduce__ = _stdout_default.__reduce__

                if hasattr( _stdout_default, "__reduce_ex__" ):
                    __reduce_ex__ = _stdout_default.__reduce_ex__

                if hasattr( _stdout_default, "__repr__" ):
                    __repr__ = _stdout_default.__repr__

                if hasattr( _stdout_default, "__setattr__" ):
                    __setattr__ = _stdout_default.__setattr__

                if hasattr( _stdout_default, "__sizeof__" ):
                    __sizeof__ = _stdout_default.__sizeof__

                if hasattr( _stdout_default, "__str__" ):
                    __str__ = _stdout_default.__str__

                if hasattr( _stdout_default, "__subclasscheck__" ):
                    __subclasscheck__ = _stdout_default.__subclasscheck__

                if hasattr( _stdout_default, "__subclasses__" ):
                    __subclasses__ = _stdout_default.__subclasses__

                if hasattr( _stdout_default, "__subclasshook__" ):
                    __subclasshook__ = _stdout_default.__subclasshook__

                if hasattr( _stdout_default, "__text_signature__" ):
                    __text_signature__ = _stdout_default.__text_signature__

                if hasattr( _stdout_default, "__weakrefoffset__" ):
                    __weakrefoffset__ = _stdout_default.__weakrefoffset__

                if hasattr( _stdout_default, "mro" ):
                    mro = _stdout_default.mro

                def __init__(self):
                    """
                        Override any super class `type( _stdout_default )` constructor, so we can 
                        instantiate any kind of `sys.stdout` replacement object, in case it was already 
                        replaced by something else like on Sublime Text with `_LogWriter()`.

                        Assures all attributes were statically replaced just above. This should happen in case
                        some new attribute is added to the python language.

                        This also ignores the only two methods which are not equal, `__init__()` and `__getattribute__()`.
                    """
                    different_methods = ("__init__", "__getattribute__")
                    attributes_to_check = set( dir( object ) + dir( type ) )

                    for attribute in attributes_to_check:

                        if attribute not in different_methods \
                                and hasattr( _stdout_default, attribute ):

                            base_class_attribute = super( _stdout_default_class_type, self ).__getattribute__( attribute )
                            target_class_attribute = _stdout_default.__getattribute__( attribute )

                            if base_class_attribute != target_class_attribute:
                                sys.stdout.write( "    The base class attribute `%s` is different from the target class:\n%s\n%s\n\n" % (
                                        attribute, base_class_attribute, target_class_attribute ) )

                def __getattribute__(self, item):

                    if item == 'write':
                        return _sys_stdout_write

                    try:
                        return _stdout_default.__getattribute__( item )

                    except AttributeError:
                        return super( _stdout_default_class_type, _stdout_default ).__getattribute__( item )

            _stdout_singleton = StdOutReplamentHidden()
            sys.stdout = _stdout_singleton

        return cls

    @classmethod
    def unlock(cls):
        """
            Detach this `stdout` writer from `sys.stdout` and allow the next call to `lock()` create
            a new writer for the stdout.
        """

        if cls.is_active:
            global _sys_stdout_write_hidden

            cls.is_active = False
            _sys_stdout_write_hidden = _stdout_default.write

import os
import sys
import logging

current_folder = os.path.dirname( os.path.realpath( __file__ ) )
log_file_path = os.path.join( current_folder, "my_log_file.txt" )

file_handler = logging.FileHandler( log_file_path, 'a' )
file_handler.formatter = logging.Formatter( "%(asctime)s %(name)s %(levelname)s - %(message)s", "%Y-%m-%d %H:%M:%S" )

log = logging.getLogger( __name__ )
log.setLevel( "DEBUG" )
log.addHandler( file_handler )

log.file_handler = file_handler
log.clean_formatter = logging.Formatter( "", "" )

StdOutReplament.lock( log )
StdErrReplament.lock( log )

log.debug( "I am doing usual logging debug..." )
sys.stderr.write( "Tests 1...\n" )
sys.stdout.write( "Tests 2...\n" )

import os
import sys
import logging

class ContextFilter(logging.Filter):
    """ This filter avoids duplicated information to be displayed to the StreamHandler log. """
    def filter(self, record):
        return not "_duplicated_from_file" in record.__dict__

current_folder = os.path.dirname( os.path.realpath( __file__ ) )
log_file_path = os.path.join( current_folder, "my_log_file.txt" )

stream_handler = logging.StreamHandler()
file_handler = logging.FileHandler( log_file_path, 'a' )

formatter = logging.Formatter( "%(asctime)s %(name)s %(levelname)s - %(message)s", "%Y-%m-%d %H:%M:%S" )
file_handler.formatter = formatter
stream_handler.formatter = formatter
stream_handler.addFilter( ContextFilter() )

log = logging.getLogger( __name__ )
log.setLevel( "DEBUG" )
log.addHandler( file_handler )
log.addHandler( stream_handler )

log.file_handler = file_handler
log.stream_handler = stream_handler
log.clean_formatter = logging.Formatter( "", "" )

StdOutReplament.lock( log )
StdErrReplament.lock( log )

log.debug( "I am doing usual logging debug..." )
sys.stderr.write( "Tests 1...\n" )
sys.stdout.write( "Tests 2...\n" )