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:ref:`where_do_I_get_PyX` if you need to download it), which should be unpacked
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below a directory, e.g. ``/home/xyz/Python``, where you want to keep the
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various PyX versions. This will result in a subdirectory with a name like
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can then ask Python to first look in the appropriate directory before looking
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for the current version of PyX by inserting the following code (appropriately
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modified according to your needs) at the beginning of your program before
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importing the PyX module::
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Including appropriate lines even if the current version of PyX is used, might
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turn out to be helpful when the current version has become an old version