I have on a few occasions wanted a for..in..if statement and if it existed
would
have used it. However, I agree that the level of change a new statement type
brings to the language is probably too high for this feature.
But what if python lifted the newline requirement for blocks that contain
compound statements? That is, statements that end in a ':' can be followed
by
other statements that end in a ':' on the same line. AFAICT there would be
no
ambiguity (to the parser; to humans, depends). Doing so would add the OPs
requested feature, though it would be two statements on one line with one
extra
character. It would also essentially bring the full comprehension syntax to
for
loops since fors and ifs could be chained arbitrarily.
# for..if
for x in y: if x in c:
some_op(x
# nested generator-like for
for line in doc: for word in line.split():
spellcheck(word)
# side effect one-liner
for item in an_iterable: if condition(item): side_effect(item))
Regards,
Jeremiah
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