Sorry, changes should have been more atomic.
*In pdf2txt.py:*
* Re-wrote main function to use argparse instead of optparse.
* Manually tested in Py2/Py3 to get partial consistency.
* Errors abound including Tags mode, but most modes weren't working at all in Py3 anyway.
* Py2 mode *probably* unchanged, cannot find any bugs yet...
* Kept old main function for posterity, for now.
*In utils:*
* Added a few compatibility functions (some string hax required chardet, new dependency):
- make_compat_bytes(in_str)-> (py3->bytes | py2->str)
- make_compat_str(in_str)-> (str)
- compatible_encode_method(bytesorstring, encoding, erraction)-> (str)
*In pdfdevice:*
* To handle different output filetypes in Py3, injected lots of calls to new utils methods,
as well as some six.PYX checks and logic. These changes are largely responsible for
enhanced Py2/Py3 consistency.
*In converter:*
* To handle output filetypes in Py2, injected a few checks and fixes particularly around the
py2 `str.encode` method and its *assumed* usual use-analogies in Py3.
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