jorisvandenbossche commented on a change in pull request #10054:
URL: https://github.com/apache/arrow/pull/10054#discussion_r614293940
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File path: python/pyarrow/io.pxi
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@@ -1449,6 +1449,10 @@ cdef shared_ptr[CBuffer] as_c_buffer(object o) except *:
cdef NativeFile get_native_file(object source, c_bool use_memory_map):
+ if source is None:
Review comment:
I suggested to add `object source not None` in the signature (that would
automatically give a better error message), but so apparently that only works
for `def` functions and not for `cdef` functions.
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