Could not find a version that satisfies the requirement pytz (from matplotlib->svmpy) (from versio

pip install svmpy出现的错误

error：  Could not find a version that satisfies the requirement pytz (from matplotlib->svmpy) (from versions: )
No matching distribution found for pytz (from matplotlib->svmpy)
解决办法：

pip wheel PyTZ

error: Could not find a version that satisfies the requirement pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.1 (from matplotlib->svmpy) (from versions: )
No matching distribution found for pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.1 (from matplotlib->svmpy)
 解决办法：

pip install pyparsing==1.5.6 --upgrade --user