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What is the use of the "close" method in a Python file?

The "close" method in Python is used to close a file that has been opened using the "open" method. It is important to close a file after you have finished using it, as this frees up system resources that were being used by the file. Once a file has been closed, you can no longer perform any operations on it. For example:

f = open("example.txt", "r")
contents = f.read()
f.close()

This opens the file "example.txt" in read mode, reads the contents of the file into a string called "contents", and then closes the file.

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