In Python, file input/output (I/O) is used to read data from and write data to files. The built-in open() function is used to open a file and create a file object, which can be used to read or write data. The open() function takes two arguments: the file name and the mode in which the file is opened (read, write, append, etc.). Once a file is open, the read() and write() methods can be used to read or write data to the file. The close() method is used to close the file object and release any resources associated with it. Python also provides a context manager, which can be used with the "with" statement to automatically close the file when the block of code is exited. In addition to reading and writing plain text files, Python supports reading and writing other file formats, such as CSV files, JSON files, and binary files. Proper file I/O is important for working with data in Python, and can be used for a variety of applications such as data processing, data analysis, and file manipulation.
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