Traceback (most recent call last):
  File "/Users/Documents/lwz/code/PulseAnalysis/pulsemain.py", line 9, in <module>
    import matplotlib.pyplot as pl
  File "/Users/Documents/lwz/code/PulseAnalysis/venv/lib/python3.6/site-packages/matplotlib/__init__.py", line 107, in <module>
    from . import cbook, rcsetup
  File "/Users/liwenzhe/Documents/lwz/code/PulseAnalysis/venv/lib/python3.6/site-packages/matplotlib/rcsetup.py", line 28, in <module>
    from matplotlib.fontconfig_pattern import parse_fontconfig_pattern
  File "/Users/Documents/lwz/code/PulseAnalysis/venv/lib/python3.6/site-packages/matplotlib/fontconfig_pattern.py", line 15, in <module>
    from pyparsing import (Literal, ZeroOrMore, Optional, Regex, StringEnd,
  File "/Users/Documents/lwz/code/PulseAnalysis/venv/lib/python3.6/site-packages/pyparsing/__init__.py", line 130, in <module>
    __version__ = __version_info__.__version__
AttributeError: 'version_info' object has no attribute '__version__'
--
FROM 111.197.235.*