Stream.exclude behaves the same as Stream.filter

[chriswatrous]

Stream.exclude should exclude items for which the predicate returns True. It seems to actually exclude items for which the predicate returns False, same as Stream.filter.

Versions

pystreams 0.6 Python 2.7.12

Expected

> list(Stream('qewr').exclude(lambda x: True))
[]

>list(Stream('qewr').exclude(lambda x: False))
['q', 'e', 'w', 'r']

Actual

> list(Stream('qewr').exclude(lambda x: True))
['q', 'e', 'w', 'r']

> list(Stream('qewr').exclude(lambda x: False))
[]

The docs say it should behave the same as itertools.ifilterfalse, which behaves like this:

> list(itertools.ifilterfalse(lambda x: True, 'qewr'))
[]

> list(itertools.ifilterfalse(lambda x: False, 'qewr'))
['q', 'e', 'w', 'r']