摘要：https://smallpdf.com/cn/result#r=e3c848bcc1ee0864a7988827b5303ffb&t=pdf-to-excel 阅读全文

摘要：报错原因：对 None 进行迭代 d = {"aa": "1", "bb": "2", "cc": "345"} d2 = {"aa": "12", "bb": "02"} l1 = [d, d2] for item in l1: x = item.get("cc") if "3" not in x 阅读全文

摘要：代码莫名报错：AttributeError: 'version_info' object has no attribute '__version__' 解决：pip install pyparsing==2.4.7 阅读全文