python print all function calls to know the script flow

Question

How can I print every function/method call ? I have tried to use : python -m trace --trace but it prints also the function inner code... I just want functions names that were called. using traceback in code prints the last function called before calling the command itself, and the code contains many classes...

Answer 1

You may find -l useful.

main.py:

def foo():
    pass

def bar():
    pass

foo()
bar()

Doing

$ python -m trace -l main.py

outputs

functions called:
filename: C:\Python34\lib\trace.py, modulename: trace, funcname: _unsettrace
filename: main.py, modulename: main, funcname: <module>
filename: main.py, modulename: main, funcname: bar
filename: main.py, modulename: main, funcname: foo

Depending on the number of functions you have, you may find a decorator more suitable:

def print_deco(func):
    def inner(*args, **kwargs):
        print(func.__name__)
        return func(*args, **kwargs)
    return inner

@print_deco
def foo():
    pass

@print_deco
def bar():
    pass

foo()
bar()

# foo
# bar