January 2018
Intermediate to advanced
856 pages
17h 17m
Chinese
Content preview from Python 技術手冊 第三版
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第 1 章 Python 簡介
授權與價格議題
CPython 的許可證（license）是 Python Software Foundation License Version 2
（
https://docs.python.org/3/license.html
），相容於 GNU Public License（GPL），
但允許你將 Python 用於任何私有、免費或其他開源軟體的開發上，類似
於 BSD/Apache/MIT 許可證。Jython、IronPython 與 PyPy 的授權也同樣自
由。你從主要 Python、Jython、IronPython 與 PyPy 網站下載的任何東西都
不會花你任何一毛錢。這些許可證並沒有對你使用它們的工具、程式庫和
說明文件所開發的軟體設下授權與訂價條件的限制。
然而，並非與 Python 有關的所有東西都免於授權費用或麻煩。你能夠免費
下載的許多第三方 Python 原始碼、工具和擴充模組都有相當自由的授權，
類似 Python 本身所用的那樣。其他則是由 GPL 或 Lesser GPL（LGPL）所
涵蓋，限制了你能用於衍生作品的授權條件。某些商業開發的模組與工具
可能會要求你付費，不管是無條件的，或是在你將它們用於營利之時。
沒有什麼可以取代仔細檢視授權條件與價格。在你投資時間與精力到任何
軟體工具或元件上之前，請先確認你能接受它的授權條件。通常，特別是
在企業環境中，這種法務事宜可能得諮詢律師。本書中所涵蓋的模組與工
具，除非我們明確指出並非如此 ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.