Python file Operation class Operation example detailed _python

This article describes an operation instance of the Python file action class with detailed code as follows:

#!/usr/bin/env python
#!/usr/bin/env python 
#coding: Utf-8 
# Purpose: File operation class

#声明一个字符串文本 
poem= ' " 
programming is fun test 
When the work are done 
if your wanna make your work also fun: Use 
python! 
' 
' #创建一个file类的实例, the pattern can be read-only (' R '), write mode (' W '), Append mode (' a ') 
f=file (' poem.txt ', ' a ') #open for ' W ' riting 
f.write ( Poem) #写入文本到文件 write text to file 
f.close () #关闭文件 Close the file

#默认是只读模式 
f=file (' Poem.txt ') 
# if no m Ode is specified, ' R ' ead "mode is assumed by default" while 
True: 
line=f.readline () #读取文件的每一个行 
If len = =0: # Zero length indicates EOF 
breaks print line, #输出该行 
#注意 because the content read from the file has ended with a newline character, so we use commas on the output statement to eliminate the word wrap. 
 
#Notice comma to avoid automatic newline added by Python 
F.close () #close the file

#帮助 help 
(file)