pytesseract 修改源码后也报错f"{tesseract_cmd} is not installed or it's not in your PATH."解决方法

因为pytesseract 0.3.7不在支持python2和python3.5，所以需要下载旧版本0.3.6
https://pythonrepo.com/repo/madmaze-pytesseract-python-deep-learning#releases