https://github.com/kragniz/anyprint/issues/16

wtf.py

import sys

def func_name(_):
	return sys._getframe(1).f_code.co_name

def line_number(_):
	return str(sys._getframe(1).f_lineno)

def file_name(_):
	return sys._getframe(1).f_code.co_filename

class FunctionNameObject():
	__str__ = func_name
	__repr__ = func_name 

class LineNumberObject():
	__str__ = line_number
	__repr__ = line_number

class FilenameObject():
	__str__ = file_name
	__repr__ = file_name 


__FUNC__ = FunctionNameObject()
__LINE__ = LineNumberObject()
__FILE__ = FilenameObject()

class Titi():
	def __init__(self):
		print(__FILE__, __FUNC__, __LINE__)

def toto():
	def tutu():
		print(__FILE__, __FUNC__, __LINE__)
	tutu()
	print(__FILE__, __FUNC__, __LINE__)

toto()
Titi()
print(__FILE__, __FUNC__, __LINE__)

wtf2.py

import sys
import datetime

class FunctionsToStr():
	"""Object to represent functions to be called when conversion to str is done.

	This is useful to delegate the computing of the string value to a later point."""
	def __init__(self, func):
		self.func = func

	__str__ = __repr__ = lambda self: self.func()

# Value based on https://gcc.gnu.org/onlinedocs/cpp/Standard-Predefined-Macros.html#Standard-Predefined-Macros
# and https://gcc.gnu.org/onlinedocs/gcc/Function-Names.html
__func__ = __FUNC__ = __FUNCTION__ = FunctionsToStr(lambda: sys._getframe(2).f_code.co_name)
# TODO: __PRETTY_FUNCTION__ could use something more beautiful based on Signature inspection
__PRETTY_FUNCTION__ = FunctionsToStr(lambda: sys._getframe(2).f_code.co_name) 
__LINE__ = FunctionsToStr(lambda: str(sys._getframe(2).f_lineno)) 
__FILE__ = FunctionsToStr(lambda: sys._getframe(2).f_code.co_filename)
# These values are computed only once (at "compilation" time and not at runtime) 
__DATE__ = datetime.datetime.now().strftime("%b %d %Y")
__TIME__ = datetime.datetime.now().strftime("%H:%M:%S")

# Others:
# If it wasn't for the $ prefix, we could use http://tldp.org/LDP/abs/html/internalvariables.html .
# http://php.net/manual/en/language.constants.predefined.php
# http://search.cpan.org/~shay/perl-5.24.2/pod/perldata.pod#Special_Literals

class Titi():
	def __init__(self):
		print(__DATE__, __TIME__, __FILE__, __FUNC__, __LINE__)

def toto():
	def tutu():
		print(__DATE__, __TIME__, __FILE__, __FUNC__, __LINE__)
	tutu()
	print(__DATE__, __TIME__, __FILE__, __FUNC__, __LINE__)

toto()
Titi()
print(__DATE__, __TIME__, __FILE__, __FUNC__, __LINE__)