Fixes needed to be able to compile pdfminer.six with Cython

[mawoqiw]

Per comment in the original project euske/pdfminer#140 compiling PDFMiner with Cython leads to substantial speed improvements. Submitted fixes are necessary to be able to compile pdfminer.six, otherwise compiler fails.

[timb07]

I'm quite interested in this. I've made some other improvements to speed up processing for certain inputs (#133, #141), but my next target for speeding up is psparser.py, and I haven't found any obvious improvements to make there. However, compiling just that file with Cython does give a small speed increase.

[timb07]

What is this needed for? Was it included by mistake?

[pombredanne]

This should be moved in the main() and/or the main removed entirely and moved to some testing script outside of the main library code

[timb07]

Again, what is pygame needed for?

[mawoqiw]

A function from unitest is called here without an import.
pygame is not listed among requirements but is called here and here

So far I haven't found much space for improvement in psparser.py, other than this, either.

[pombredanne]

@mawoqiw I think we should not add pygame as a dep... instead it should be removed. When was this introduced?

[pombredanne]

This main() should be removed entirely and moved to some testing script outside of the main library code and we cannot add pygame as a runtime dep

[mawoqiw]

You are right @pombredanne. pygame is indeed not required to use Cython, thanks.
With regards to main() function I would rather deal with it in a different merge request. Do you have any idea what is the purpose of that code?

[mawoqiw]

One of the tests is using image.save method from that library. I guess it could be replaced by something else to get rid of that dependency.