New submission from Tim <tim.elberf...@uantwerpen.be>:

In the initialization of a new `RawArray` the `size_or_initializer` parameter 
is tested for being an instance of `int`. When passing something like 
numpy.int64 here, the code crashes, because it does not recognize this as an 
integer. The workaround is to cast to int(). Wouldn't it be nicer to compare to 
types.IntType to allow for custom integer types?

def RawArray(typecode_or_type, size_or_initializer):
    '''
    Returns a ctypes array allocated from shared memory
    '''
    type_ = typecode_to_type.get(typecode_or_type, typecode_or_type)
-    if isinstance(size_or_initializer, int):
+    if size_or_initializer is IntType:

----------
messages: 304902
nosy: meetaig
priority: normal
severity: normal
status: open
title: sharedctypes.RawArray initialization
type: behavior
versions: Python 3.5, Python 3.6

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue31859>
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