Description
At present, FeatureHasher (and HashingVectorizer) is not supported with PyPy because it relies on interacting with array.array from Cython which is not supported and probably won't be in the near future (cf cython/cython#1818 and bitbucket.org/pypy/pypy#2807).
Following workarounds were proposed in #11010, briefly,
- use a separate pure python implementation for
_hashing.pyspecific PyPy [MRG] PyPy support #11010 (comment) - convert the current
_hashing.pyxto cython's pure-python mode together with an external pxd ([MRG] PyPy support #11010 (comment)) - use a different data structure instead of
array.array([MRG] PyPy support #11010 (comment))