File operation steps
- open a file
- Manipulate files: read/write content
- Close the file (reading and writing are completed, and must be closed in time)
open method
def open(file, mode='r', buffering=None,
encoding=None, errors=None, newline=None,
closefd=True):
File read and write mode
Read operation
The dangers of forgetting to close a file
- Opening a certain number of files will cause the opening to fail.
- It takes up memory space and is a waste of resources.
- Will cause the system to automatically reclaim resources and lose data
with usage
with open('data.txt', 'r', encoding='utf-8') as f:
print(f.read())
print(f.closed) ## 查看关闭状态
Finally, I would like to thank everyone who reads my article carefully. Reciprocity is always necessary. Although it is not a very valuable thing, if you can use it, you can take it directly:
This information should be the most comprehensive and complete preparation warehouse for [software testing] friends. This warehouse has also accompanied tens of thousands of test engineers through the most difficult journey. I hope it can also help you!
