Input loop: Difference between revisions

Content added Content deleted
m (move fileinput to first part of python section since it's the most flexible)
(Undo revision 289780 by Maxr (talk) not necessarily any better at the started task though.)
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=={{header|Python}}==
=={{header|Python}}==

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When you want to read from stdin, or (multiple) filenames are given on the command line:
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<lang python>import fileinput
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for line in fileinput.input():
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pass # process line, includes newline</lang>
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The fileinput module can also do inplace file editing, follow line counts, and the name of the current file being read etc.


To create a Python3 input loop use python's `input()` function.
To create a Python3 input loop use python's `input()` function.
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lines = my_file.readlines() # returns a list of the rest of the lines from the file</lang>
lines = my_file.readlines() # returns a list of the rest of the lines from the file</lang>
This does not mix well with the iteration, however.
This does not mix well with the iteration, however.


⚫
When you want to read from stdin, or (multiple) filenames are given on the command line:
⚫
<lang python>import fileinput
⚫
for line in fileinput.input():
⚫
pass # process line, includes newline</lang>
⚫
The fileinput module can also do inplace file editing, follow line counts, and the name of the current file being read etc.


=={{header|R}}==
=={{header|R}}==
Retrieved from "https://rosettacode.org/wiki/Input_loop"