問題：
Want to improve this post?
想改進這篇文章嗎？
Provide detailed answers to this question, including citations and an explanation of why your answer is correct.
提供此問題的詳細答案，包括引文和解釋爲什麼您的答案是正確的。
Answers without enough detail may be edited or deleted.
沒有足夠詳細信息的答案可能會被編輯或刪除。
Is it possible to upgrade all Python packages at one time with pip ?是否可以使用pip一次升級所有 Python 包？
Note : that there is a feature request for this on the official issue tracker.注意：在官方問題跟蹤器上有一個功能請求。
解決方案：
參考一： https://en.stackoom.com/question/BPbC參考二： https://stackoom.com/question/BPbC