The python file is written to the instance analysis

This article illustrates the use of writing to an python file. Share with you for your reference. Specific analysis is as follows:

The wirte() method in Python writes the string to a file, and the writelines() method writes the contents of the list to a file.

f=file("hello.txt","w+")
li=["hello world\n","hello china\n"]
f.writelines(li)
f.close()

Contents of the document:

hello world
hello china

The write() and writelines() methods clean up the original contents of the file before they are written, and then re-write the new contents. If you need to keep the original contents of the file, but just append new contents, you can open the file in "a+" mode.

f=file("hello.txt","a+")
new_context="goodbye"
f.write(new_content)
f.close()

At this point the contents of hello.txt are as follows:

hello world
hello china
goodbye

Practice:

>>> f=file("hello.txt","w+")
>>> li=["hello world\n","hello china\n"]
>>> f.writelines(li)
>>> f.close()
>>> 
>>> f=file("hello.txt","a+")
>>> new_context="goodbye"
>>> f.write(new_content)
>>> f.write(new_content)
>>> f.close()

Results:

hello world
hello china
goodbyegoodbye

I hope this article has been helpful to your Python programming.