pdfminer3k的安装应该是没问题的，最后显示的跟老师视频上一样的：

Finished processing dependencies for pdfminer3k==1.3.1

但是按照后来验证的操作，尝试了几次还是报错。

我的是2.7  然后是 mac OS ，是因为版本问题吗？求解答，谢谢！！

报错内容：

Traceback (most recent call last):

  File "pdf2txt.py", line 6, in <module>

    from pdfminer.pdfinterp import PDFResourceManager, process_pdf

  File "/Library/Python/2.7/site-packages/pdfminer3k-1.3.1-py2.7.egg/pdfminer/pdfinterp.py", line 5, in <module>

    from .cmapdb import CMapDB, CMap

  File "/Library/Python/2.7/site-packages/pdfminer3k-1.3.1-py2.7.egg/pdfminer/cmapdb.py", line 23, in <module>

    from .psparser import PSStackParser

  File "/Library/Python/2.7/site-packages/pdfminer3k-1.3.1-py2.7.egg/pdfminer/psparser.py", line 4, in <module>

    from .utils import choplist

  File "/Library/Python/2.7/site-packages/pdfminer3k-1.3.1-py2.7.egg/pdfminer/utils.py", line 212, in <module>

    0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff,

  File "/Library/Python/2.7/site-packages/pdfminer3k-1.3.1-py2.7.egg/pdfminer/utils.py", line 180, in <genexpr>

    PDFDocEncoding = ''.join( chr(x) for x in (

ValueError: chr() arg not in range(256)