How to print the function name as a string in Python from inside that function

Question

def applejuice(q):
 print THE FUNCTION NAME!

It should result in "applejuice" as a string.

• Lennart Regebro: See meta.stackexchange.com/questions/18584/…
• Lennart Regebro: From the answer you chose we can conclude that this was indeed a duplicate. Indeed, a question almost exactly the same name already existed: stackoverflow.com/questions/251464/…
• Mark Chackerian: I disagree that this is a duplicate of #251464 -- it seems like this question is the inverse instead.
• bruno desthuilliers: What should it print in this case : def applejuice(): print "thefunctionname"; orangejuice = applejuice; del applejuice; orangejuice();

Answer 1

This also works:

import sys
def applejuice(q):
 func_name = sys._getframe().f_code.co_name
 print func_name

Answer 2

def applejuice(**args):
 print "Running the function 'applejuice'"
 pass

or use:

myfunc.__name__
>>> print applejuice.__name__
'applejuice'

Also, see how-to-get-the-function-name-as-string-in-python

• joel: this isn't from inside the function

Answer 3

import traceback
def applejuice(q):
 stack = traceback.extract_stack()
 (filename, line, procname, text) = stack[-1]
 print procname

I assume this is used for debugging, so you might want to look into the other procedures offered by the traceback module. They'll let you print the entire call stack, exception traces, etc.

Answer 4

Another way

import inspect 
def applejuice(q):
 print inspect.getframeinfo(inspect.currentframe())[2]

Answer 5

You need to explain what your problem is. Because the answer to your question is:

print "applejuice"

• wilhelmtell: maybe he means: def func(anothah_func): print anothah_func's name
• Lennart Regebro: Well, that's definitely possible. We'll see if he says what the problem is.

Answer 6

This site gave me a decent explanation of how sys._getframe.f_code.co_name works that returns the function name.

http://code.activestate.com/recipes/66062-determining-current-function-name/

• Stephane Rolland: Wlecome to SO! please, think about providing explanation, and not only pointing to external links.

Answer 7

def foo():
 # a func can just make a call to itself and fetch the name
 funcName = foo.__name__
 # print it
 print 'Internal: {0}'.format(funcName)
 # return it
 return funcName
# you can fetch the name externally
fooName = foo.__name__
print 'The name of {0} as fetched: {0}'.format(fooName)
# print what name foo returned in this example
whatIsTheName = foo()
print 'The name foo returned is: {0}'.format(whatIsTheName)