What is File Handling in Python?
File handling is an important part of any web application. Python has several functions for creating, reading, updating, and deleting files. The key function for working with files in Python is the open function. The open function takes two parameters i.e. filename, and mode.
There are four different modes for opening a file.
- “r” – Read – Opens a file for reading, error if the file does not exist
- “a” – Append – Opens a file for appending, creates the file if it does not exist
- “w” – Write – Opens a file for writing, creates the file if it does not exist
- “x” – Create – Creates the specified file, returns an error if the file exists
You can also specify if the file should be handled as binary or text mode using “t” for text and “b” for binary mode.
- “t” – Text – Default value. Text mode
- “b” – Binary – Binary mode e.g., images
By default, the read method returns the whole text, but you can also specify how many characters you want to return. You can also return one line by using the readline method. Always close the file using close method once you are done with it.
To delete a file, you must import the OS module, and run its os.remove function. To delete an entire folder, use os.rmdir method.
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