https://jingyi.blog/blog/python/ Recent content in Python on jingyi's blog Hugo -- gohugo.io en-us This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. Wed, 10 Feb 2021 06:23:49 +0000 https://jingyi.blog/fluent-python-%E8%AF%BB%E4%B9%A6%E7%AC%94%E8%AE%B0/ Wed, 10 Feb 2021 06:23:49 +0000 https://jingyi.blog/fluent-python-%E8%AF%BB%E4%B9%A6%E7%AC%94%E8%AE%B0/ 1. 数据模型 data model obj[key] -> obj.__getitem__(key) __getitem__ 可以读作 dunder-getitem (double-duner getitem)， 这些 magic method 也称作 dunder method 列表：__len__ 和 __getitem__ 自定义的类只要实现了 __len__ 和 __getitem__ 这两个 magic method https://jingyi.blog/effective-python-%E8%AF%BB%E4%B9%A6%E7%AC%94%E8%AE%B0/ Wed, 10 Feb 2021 06:14:20 +0000 https://jingyi.blog/effective-python-%E8%AF%BB%E4%B9%A6%E7%AC%94%E8%AE%B0/ 1. Pythonic Thinking 1. version python -V python --version import sys print(sys.version_info) print(sys.version) # try dir(sys) to find out more 2. PEP8 Python Enhancement Proposal #8 3. bytes, str and unicode 4. 从复杂表达式抽出帮助 (helper) 函数 不要写过长的单行逻辑 if/else 优于 and/or 5. 序列分片 Slice Sequence 从左向右 https://jingyi.blog/handy-ipython-tips/ Fri, 10 Apr 2020 05:43:50 +0000 https://jingyi.blog/handy-ipython-tips/ the magics I/O reload modules you just modified on the fly, autoreload: %load_ext autoreload %autoreload 2 save object for later use, storemagic: # for example you got a counter c = Counter("a b c".split()) # you can save it in IPython's database and quit %store c exit() # when you want your counter back, simply type: %store -r save the ad hoc scripts you typed in IPython session, logstart: %logstart from awesome import me exit() # cat ipython_log.