Raymond Hettinger <raymond.hettin...@gmail.com> added the comment:
Instead of doing lookups with square brackets, consider using the dict.get()
method that returns a default value rather than raising a KeyError for a
missing key.
composer2[input1] --> composer2.get(input1, 0)
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nosy: +rhettinger
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue39240>
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