Example of reading and writing files and storage in Python Programming,

Example of reading and writing files and storage in Python Programming,

1. File writing and reading

#! /Usr/bin/python #-*-coding: UTF-8-*-# Filename: using_file.py # The file is created and read by s = '''. We are both wood leaders, you are not allowed to speak! ''' # Create a file and write the character f = file('test_file.txt ', 'w') f. write (s) f. close () # Read the file and print f = file('test_file.txt ') while True: line = f. readline () # if the line length is 0, it indicates that the file has been read. if len (line) = 0: break # The default line break is also read, therefore, replace print line, f. close ()

 

Execution result:

We are all wood people. Don't speak, don't move!

 
2. writing and reading of memory

#! /Usr/bin/python #-*-coding: UTF-8-*-# Filename using_pickle.py # use memory # load the memory module, as is followed by the alias # import pickle as p # The book says cPickle is much faster than pickle import cPickle as p listpickle = [1, 2, 2, 3] picklefile = 'picklefile. data 'f = file (picklefile, 'w') # write data such as p. dump (listpickle, f) f. close () del listpickle f = file (picklefile) # Read data storedlist = p. load (f) print storedlist f. close ()

Execution result:

[1, 2, 2, 3]

Let's take a look at an example of using cPickle to store objects.

#!/usr/bin/python #Filename:pickling.py  import cPickle as p  shoplistfile = 'shoplist.data'  shoplist = ['apple', 'mango', 'carrot']  f = file(shoplistfile, 'w') p.dump(shoplist, f) f.close()  del shoplist  f = file(shoplistfile) storedlist = p.load(f) print storedlist 

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