NumPy and memmap: [Errno 24] Too many open files

Question

I am working with large matrixes, so I am using NumPy\'s memmap. However, I am getting an error as apparently the file descriptors used by memmap are not being closed.

Answer 1

Since the memmap does not take the open file descriptor, but the file name, I suppose you leak the temp_fd file descriptor. Does os.close(temp_fd) help?

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Great that it works.

Since you can pass numpy.memmap a file-like object, you could create one from the file descriptor you already have, temp_fd.

fobj = os.fdopen(temp_fd, "w+")
numpy.memmap(fobj, ...