Python file operations list
Python file operations list
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What is the open mode of a file in Python?
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In Python, when we say "open mode" of a file, it refers to the way the file is opened for reading, writing, or both. The mode determines whether the file can be read from, written to, or both.
Python provides several built-in modes for opening files:
r (read-only): This mode opens the file for reading only. If the file does not exist, you will get a FileNotFoundError. If the file exists, it is opened in text mode and any line endings are converted to the platform's default newline.
Example: open('file.txt', 'r')
w (write-only): This mode opens the file for writing only. If the file does not exist, a new one will be created. If the file exists, its contents will be truncated, and the existing file will be replaced with an empty one.
Example: open('file.txt', 'w')
a (append-only): This mode opens the file for writing only. If the file does not exist, a new one will be created. If the file exists, all writes will be appended to the end of the file, leaving any existing content intact.
Example: open('file.txt', 'a')
rb (read-binary): This mode opens the file for binary reading only. It is similar to the r mode but does not convert line endings or interpret characters as text.
Example: open('binary_file.bin', 'rb')
wb (write-binary): This mode opens the file for binary writing only. It is similar to the w mode but does not convert line endings or interpret characters as text.
Example: open('binary_file.bin', 'wb')
ab (append-binary): This mode opens the file for binary appending only. It is similar to the a mode but does not convert line endings or interpret characters as text.
Example: open('binary_file.bin', 'ab')
x (create): This mode creates a new file if it does not exist, and returns an error if the file already exists.
Example: open('file.txt', 'x')
+r, +w, or +a: These modes open the file for both reading and writing. The + sign can be used with any of the above modes to add read or write permission to an existing mode.
Example: open('file.txt', '+r') or open('file.txt', '+w')
In Python, when you open a file using one of these modes, it returns a file object that provides methods and attributes for interacting with the file. For instance, you can use the read(), write(), and close() methods to perform operations on the file.
That's a comprehensive overview of the open modes in Python!
