AttributeError occurs when running in a non-Linux environment

[otms61]

Hi, thanks for making a great python module.

I understand that README.md says Works on Linux on, but I had a problem that it was difficult to identify the cause from the error message when running on macOS.

Our team is using a memory-tempfile with code that runs on a only Linux machine.
However, some of our team engineers are developing on macOS and when he just run the test code he got the following error:

test_x.py:8: in <module>
    if not tempfile.found_mem_tempdir():
/Users/otms61/.pyenv/versions/3.7.5/lib/python3.7/site-packages/memory_tempfile/memory_tempfile.py:71: in found_mem_tempdir
    return len(self.usable_paths) > 0
E   AttributeError: 'MemoryTempfile' object has no attribute 'usable_paths'

The code is like this

from memory_tempfile import MemoryTempfile

tempfile = MemoryTempfile()
if tempfile.found_mem_tempdir():
    pass

Although it is Works only on Linux, I think there are two problems with the current implementation.

• temp-memory must be called carefully, and extra code to check the execution environment is required
• It is difficult to identify the cause from the error message

I think about some solutions.

Solution 1:
No matter what environment you run, initialize enable_pahts to prevent AttributeError.

Solution 2:
Raise RuntimeError when running on non-Linux.

Please let me know the opinion of the author.
Thanks.

[otms61]

I just implemented it with the solution 1 (#6) .
Thank you for confirmation.