Example of file operation usage in python Development

This article mainly introduces the file operation usage in python development. It provides detailed analysis of Python's file path, file name, extension name, and other operation skills in the form of instances, which has some reference value, for more information, see the following example to describe how to operate python files. We will share this with you for your reference. The details are as follows:

Let's take a look at the official API: OS-Miscellaneous operating system interfaces

Below is my demo:

Import reimport osimport time # image file path image_path = 'e: \ test \ 20130627_140132Hongten.jpg '# folder path dir_path = 'e: \ test \ hongten '# file path file_abs_path = 'e: \ test \ hongten.txt' # obtain the current workspace directory def getcwd (): return OS. getcwd () # obtain all files and folders in the specified folder # if the specified folder does not exist, the system returns the prompt def listdir (dir_path): if OS. path. exists (dir_path): return OS. listdir (dir_path) else: return 'Directory '+ dir_path +' does not exist 'def isfile (file_path): if OS. path. Exists (file_path): return OS. path. isfile (file_path) else: return 'file' + dir_path + 'does not exist 'if _ name _ =' _ main __': print ('current workspace is: {0 }'. format (getcwd () print ('files and directories in the current Workspace: ', listdir (getcwd () print (' # '* 40) print (listdir ('C: \ test') print ('#' * 40) print (isfile (image_path) print ('#' * 40) array = OS. path. split (image_path) print (array) # Full name of the file: 20130627_140132Hongten.jpg file_full_name = array [1] name = OS. path. splitext (file_full_name) # file name: 20130627_140132Hongten file_name = name [0] # file Suffix :. jpg file_ext = name [1] print ('file Full name: {0}, file name: {1}, file Suffix: {2 }'. format (file_full_name, file_name, file_ext) print ('#' * 40) # create an empty folder # OS. mkdir ('e: \ mydir') # create a multi-level directory # OS. makedirs (r 'e: \ bb \ CC') print ('#' * 40) # open a file fp = open (file_abs_path, 'W + ') # print ('first line of reading file: {0}: {1 }'. format (file_abs_path, fp. readline () # Each row of the file acts as a list member and returns the list. In fact, it is implemented by calling readline () cyclically. # If the size parameter is provided, size indicates the total length of the read content, that is, it may be read-only to a part of the file. # Print ('read file: {0} All content: {1} '. format (file_abs_path, fp. readlines () content = 'this is a test message !! \ Ngood boy! \ Ngogo... \ nhello, I \'m Hongten \ nwelcome to my space! 'Fp. write (content) fp. flush () fp. close () fp = open (file_abs_path, 'r + ') print ('read file: {0} All content: {1 }'. format (file_abs_path, fp. readlines ()))

Running effect:

Python 3.3.2 (v3.3.2: d047928ae3f6, May 16 2013, 00:03:43) [MSC v.1600 32 bit (Intel)] on win32Type "copyright", "credits" or "license () "for more information. >>> ================================== RESTART ======== ==========================================>> the current workspace is: d: \ Python33 \ files and directories in the current workspace of the workspace: ['rename. py', 'test _ annotation. py', 'test _ class. py', 'test _ exception. py', 'test _ exit. py', 'test _ file. py', 'test _ getA. Py', 'test _ hello. py', 'test _ import. py', 'test _ input. py', 'test _ loops. py', 'test _ myclass. py', 'test _ OS. py', 'test _ range. py', 'test _ str. py', 'test _ string. py', 'test _ while. py', 'test _. py'] ##################################### ### directory c: \ test does not exist ##################################### ### True #################################### #### ('e: \ test ', '20130627_140132Hongten.jpg') Full name: 20130627_140132Hongten.jpg, File Name: 20130627_140132Hongten, file Suffix :. jpg ####################################### ######################################## # Reading files: e: \ test \ hongten.txt all content: ['this is a test message !! \ N', 'good boy! \ N', 'gogo... \ n', "hello, I'm Hongten \ n", 'Welcome to my space! '] >>>

I hope this article will help you with Python programming.