在 PEP8 读到了关于代码缩进的指导建议: Code lay-out Indentation Use 4 spaces per indentation level. For really old code that you don't want to mess up, you can continue to use 8-space tabs. Tabs or Spaces? Never mix tabs and spaces. The most popular way of indenting Python is with spaces only. The second-most popular way is with tabs only. Code indented with a mixture of tabs and spaces should be converted to using spaces exclusively. When invoking the Python command line interpreter with the -t option, it issues warnings about code that illegally mixes tabs and spaces. When using -tt these warnings become errors. These options are highly recommended! For new projects, spaces-only are strongly recommended over tabs. Most editors have features that make this easy to do. 在此之前我也仔细考虑过缩进应该使用哪个比较好——tab vs. white space.最终我觉得使用tab比较适合我,主要是基于以下几点考虑: 在行首的所有缩进都是用tab,在行内和行末只适用white space,这样无论代码使用哪一种IDE或是editor打开,无论设置的tab width是4或是8或是其他什么奇怪的数,每一行的缩进关系都可以正确的显示出来,差别只是宽度而已,不影响可读性。 我使...