how to empty pickle file code example

Example 1: how to clear a pickle file

#Create an empty variable
empty_list = []
#Open the pickle file in 'wb' so that you can write and dump the empty variable
openfile = open('filename', 'wb')
pickle.dump(empty_list, openfile)
openfile.close()

Example 2: how to save a pickle file

Python 3.4.1 (default, May 21 2014, 12:39:51) 
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.2.79)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> mylist = ['I wish to complain about this parrot what I purchased not half an hour ago from this very boutique.', "Oh yes, the, uh, the Norwegian Blue...What's,uh...What's wrong with it?", "I'll tell you what's wrong with it, my lad. 'E's dead, that's what's wrong with it!", "No, no, 'e's uh,...he's resting."]
>>> 
>>> import pickle
>>> 
>>> with open('parrot.pkl', 'wb') as f:
...   pickle.dump(mylist, f)
... 
>>>  with open('parrot.pkl', 'wb') as f:
...   new_list = pickle.load(mylist, f)