Python files and streams (instance description ),

Source: Internet
Author: User

Python files and streams (instance description ),

1. File writing

# Opening the file. If the path is incorrect, the error f = open (r "C: \ Users \ jm \ Desktop \ pyfile.txt", "w") f. write ("Hello, world! \ N ") f. close ()

2. File Reading

# Read f = open (r "C: \ Users \ jm \ Desktop \ pyfile.txt", "r") print (f. read () f. close () Output: Hello, world!

3. read/write rows

Readline ([size]) reads the entire line, including the "\ n" character.

Readlines ([sizehint]) reads all rows and returns the list. If sizeint> 0 is specified, the total number of rows returned is approximately sizeint bytes. The actual read value may be larger than sizhint, because the buffer needs to be filled.

Writelines (sequence) writes a sequence string list to the file. If you need to wrap the string, add the line break for each line.

4. file objects can be iterated and can be used directly in the for loop.

The above Python file and stream (instance description) are all the content shared by Alibaba Cloud. I hope you can give us a reference and support the help house.

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.