I have a python function
def My_Function():
    Some Codes
    return Something
I want to change Some Codes in My_Function as see the effects in Ipython console. So I modify Some Codes and save the corresponding .py file and import the function in Ipython console: import My_Function. However, when I execute My_Function in Ipython, the old version is executed not the modified one. Why?  
 
    