Georg Brandl <ge...@python.org> added the comment:

Chaining comparison operators inserts implicit "and" conditions:

  a OP b OP c OP d

is equivalent to

  (a OP b) and (b OP c) and (c OP d)

This is most useful with ==, <, <= and so forth, but "in" and "is" also count 
as comparison ops and have the same precedence.

----------
nosy: +georg.brandl
resolution:  -> invalid
status: open -> closed

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue14247>
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