pickling long lists (size limit?)

strings_list = list()  #make an empty list                  
for i in range(100): #then fill it up
     strings_list.append("30 chars......................")

list_pickled = pickle.dumps(obj, -1) #pickle the list (-1 is for HIGHEST_PROTOCOL)

list_unpickled = pickle.loads(list_pickled) #unpickle the list

for i in range(1000): #make the list longer this time       
      strings_list.append("30 chars......................")  

import cPickle as pickle

strings_list = list()  #make an empty list                  
for i in range(1000000): #then fill it up
    strings_list.append("30 chars......................" + str(i))

list_pickled = pickle.dumps(strings_list, -1) #pickle the list (-1 is for HIGHEST_PROTOCOL)

f = open('test.pickle', 'wb')
f.write(list_pickled)
f.close()

list_unpickled = pickle.loads(list_pickled) #unpickle the list

print list_unpickled[0:2]

hashes = list()
for i in range(1000):
      chunk = str(i)  #so we have unique strings
      chunk = chunk.zfill(16384)  #pad the string with zeros until <width> is reached...in my program i'm reading 16k chunks and hashing them
      shaobj = sha.new(chunk)  #create a fresh sha object and assign the chunk
      hash = shaobj.hexdigest()  #get the hexadecimal hash
      hashes.append(hash)  #add it to the list
            
my_custom_print_func('before pickling. hashes=' + repr(hashes))
list_pickled = pickle.dumps(hashes, -1) 

list_unpickled = pickle.loads(list_pickled) #unpickle the list
my_custom_print_func('after unpickling. hashes=' + repr(list_unpickled))

#!/usr/bin/env python
import sha
import pickle

modules ={}

def main():
    hashes = list()
    the_file = file("C:\\somepath\\somefile.ext", 'r')
    while 1:
        chunk = the_file.read(16*1024)
        if len(chunk) == 0:
            break
        shaobj = sha.new(chunk)
        hash = shaobj.hexdigest()
        hashes.append(hash)
        
    print 'before pickling. len=' + str(len(hashes)) + ' hashes=' + hashes[len(hashes)-1] #print the length and the last element
    list_pickled = pickle.dumps(hashes, -1) #pickle the list (-1 is for HIGHEST_PROTOCOL)

    list_unpickled = pickle.loads(list_pickled) #unpickle the list
    print 'after unpickling. len=' + str(len(hashes)) + ' hashes=' + hashes[len(hashes)-1]

if __name__ == '__main__':
    main()