print() function in Python3 supports a ‘file‘ argument, which specifies where the function should write a given object(s) to. If not specified explicitly, it is sys.stdout by default.
It serves two essential purposes:
Print to STDERR Print to external file
Note : The ‘file’ parameter is found only in Python 3.x or later.
Printing to STDERR :
Specify the file parameter as sys.stderr instead of the default value. This is very useful when debugging a small program (It would be better to use a debugger in other cases).
# Code for printing to STDERR import sys print('GeeksForGeeks', file = sys.stderr) |
Output :
GeeksForGeeks
Printing to a specific file :
Instead of the default value, specify the file parameter with the name of the required file. If the file does not exist, a new file by that name is created and written to.
# Code for printing to a file sample = open('samplefile.txt', 'w') print('GeeksForGeeks', file = sample) sample.close() |
Output (in “samplefile.txt”) :
GeeksForGeeks
Note : Try this in interpreter on your system, since such file can’t be accessed on Online IDE.
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