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How to make for loop faster in python?

how do you make a For loop when you don't need index in python?

  • if i need a for loop in python for i in range(1,42): print "spam" but don't use the "i" for anything pylint complains about the unused variable. How should i handle this? I know you can do this: for dummy_index in range(1,42): print "spam" but doing this seems quite strange to me, is there a better way? I'm quite new at python so forgive me if I'm missing something obvious.

  • Answer:

    There is no "natural" way to loop n times without a counter variable in Python, and you should not resort to ugly hacks just to silence code analyzers. In your case I would suggest one of the following: Just ignore the PyLint warning (or filter reported warnings for one-character variables) Configure PyLint to ignore variables named i, that are usually only used in for loops anyway. Mark unused variables using a prefix, probably using the default _ (it's less distracting than dummy)

Jacxel at Stack Overflow Visit the source

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for _ in range(1,42): print "spam"

jamylak

According to http://linux.die.net/man/1/pylint: --dummy-variables-rgx= A regular expression matching names used for dummy variables (i.e. not used). [current: _|dummy] In other words, if the name of the variable starts with an underscore, or with the letters dummy, pylint would not complain about the variable being unused: for dummy in range(1, 42): print "spam"

aix

Usually you can work around it, just like this in your case: >>> print "spam\n"*len(range(1,42))

luke14free

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