Demo code using the Python inspect module

inspect_demo.py

''' Demo script experimenting with various features of the 
inspect module 
'''
# To be run with Python3.3


from inspect_test import MyClass
from inspect_test import myfunc
from inspect_test import mygen

import inspect
from inspect import signature

if __name__=='__main__':   

    # demo of inspect.getsource()
    obj = MyClass()

    # Get the source file where this class
    if inspect.isclass(MyClass):
        print(inspect.getsource(MyClass))

    # demo of inspect.getmembers()

    # Get the members
    print('Object Members:: \n')
    for member in inspect.getmembers(obj):
        print(member)


    print('\n\nRandom Expirements \n')

    # experiments with builtins
    functions = [obj.fun1, open, dir, myfunc]
    for func in functions:
        if inspect.isbuiltin(func):
            print('{0:s} is built in'.format(func.__name__))
        else:
            print('{0:s} is not built in'.format(func.__name__))

    print('\n')
    # experiments with signatures
    # Introduced in Python 3.3
    functions = [obj.fun1, inspect.isclass]
    for func in functions:
        sig = signature(func)
        print('Parameters: {0:s}:: {1:s}'.format(func.__name__,str(sig)))
    
    print('\n')

    # experiments with frames
    myfunc()

    # generator experiments   
    generator = mygen()
    
    # get the current state
    print(inspect.getgeneratorstate(generator))
    
    count = 0
    for fib in generator:
        # get the current state
        print(inspect.getgeneratorstate(generator))

        #print the number yielded
        print(fib)
        if count >= 10:
            break
        count = count + 1

    print(inspect.getgeneratorstate(generator))

inspect_test.py

import inspect

class MyClass:
    """ A class """

    def __init__(self):
        pass

    def fun1(self, a, b):
        return 0

    def fun2(self):
        return 1

def myfunc():

    # frame demo
    currentframe = inspect.currentframe()
    callgraph=inspect.getouterframes(currentframe)
    
    print('Call Graph for {0:s}'.format(myfunc.__name__))
    for record in callgraph:
        frameinfo = inspect.getframeinfo(record[0])
        print(frameinfo.function)


# Simple generator returning fibonacci numbers

def mygen():
    a = 0
    b = 1
    while True:
        c = a+b
        yield c
        a,b = b,c