Python Static Analysis¶

PyLint¶

安装
```
pip install pylint
```
Checker

https://pylint.readthedocs.io/en/latest/technical_reference/features.html
文档

https://pylint.readthedocs.io/en/latest/faq.html

pep8/pycodestyle¶

安装
```
pip install pep8/pycodestyle
```
文档

https://pycodestyle.pycqa.org/en/latest/ https://www.osgeo.cn/pycodestyle/
Error codes

https://pycodestyle.pycqa.org/en/latest/intro.html?highlight=E501#error-codes

flake8¶

安装
```
pip install flake8
```
文档

https://flake8.pycqa.org/en/latest/faq.html
Error / Violation Codes

https://flake8.pycqa.org/en/latest/user/error-codes.html

PEP8 代码规范常见问题及解决方法¶

PEP 8: no newline at end of file

解决方法：代码末尾需要另起一行，光标移到最后回车即可
PEP 8: indentation is not a multiple of four

解决方法：缩进不是4的倍数，检查缩进
PEP 8: over-indented

解决方法：过度缩进，检查缩进
PEP 8: missing whitespace after ‘,’

解决方法：逗号后面少了空格，添加空格即可，类似还有分号或者冒号后面少了空格
PEP 8: multiple imports on one line

解决方法：不要在一句 import 中引用多个库，举例：import socket, urllib.error最好写成：import socket import urllib.error
PEP 8: blank line at end of line

解决方法：代码末尾行多了空格，删除空格即可
PEP 8: at least two spaces before inline comment

解决方法：代码与注释之间至少要有两个空格
PEP 8: block comment should start with ‘#’

解决方法：注释要以#加一个空格开始
PEP 8: inline comment should start with ‘#’

解决方法：注释要以#加一个空格开始
PEP 8: module level import not at top of file

解决方法：import不在文件的最上面，可能之前还有其它代码
PEP 8: expected 2 blank lines，found 0

解决方法：需要两条空白行，添加两个空白行即可
PEP 8: function name should be lowercase

解决方法：函数名改成小写即可
PEP 8: missing whitespace around operator

解决方法：操作符(’=’、’>’、’<’等)前后缺少空格，加上即可
PEP 8: unexpected spaces around keyword / parameter equals

解决方法：关键字/参数等号周围出现意外空格，去掉空格即可
PEP 8: multiple statements on one line (colon)

解决方法：多行语句写到一行了，比如：if x == 2: print(’OK’)要分成两行写
PEP 8: line too long (82 > 79 characters)

解决方法：超过了每行的最大长度限制79
PEP 8: Simplify chained comparison

可简化连锁比较（例如：if a >= 0 and a <= 9: 可以简写为：if 0 <= a <= 9:）