首页 > 编程语言 >[转]Python PEP8 代码规范常见问题及解决方法

[转]Python PEP8 代码规范常见问题及解决方法

时间:2022-08-28 14:33:48浏览次数:91  
标签:常见问题 multiple whitespace Python after PEP PEP8 indentation line

转自:https://blog.csdn.net/qq_36759224/article/details/89304878

 

Python 的 PEP8 代码规范,将常见的 PEP8 代码规范问题和解决方法记录一下,学习一下,养成良好的习惯,编写规范的代码!


  • 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:


如果想要选择性忽略PEP8代码风格的警告信息可以使用以下方法:(养成良好的习惯,编写规范的代码!不推荐忽略!)

①将鼠标移到出现警告信息的地方,按 alt+Enter,选择忽略(Ignore)这个错误即可:
在这里插入图片描述
②依次选择 File - Settings - Editor - Inspections,在 Python下找到 PEP8 coding style violation 选项,在右下角的 Ignore errors 里点击加号可以添加需要忽略的警告信息ID(ID信息见后面附录),例如想要忽略indentation contains mixed spaces and tabs这个警告,只需要添加其ID:E101 即可
在这里插入图片描述

 

附录:全部警告信息以及对应的ID,官方地址:https://pep8.readthedocs.io/en/latest/intro.html#error-codes

codesample message
E1 Indentation
E101 indentation contains mixed spaces and tabs
E111 indentation is not a multiple of four
E112 expected an indented block
E113 unexpected indentation
E114 indentation is not a multiple of four (comment)
E115 expected an indented block (comment)
E116 unexpected indentation (comment)
E117 over-indented
E121 (*^) continuation line under-indented for hanging indent
E122 (^) continuation line missing indentation or outdented
E123 (*) closing bracket does not match indentation of opening bracket’s line
E124 (^) closing bracket does not match visual indentation
E125 (^) continuation line with same indent as next logical line
E126 (*^) continuation line over-indented for hanging indent
E127 (^) continuation line over-indented for visual indent
E128 (^) continuation line under-indented for visual indent
E129 (^) visually indented line with same indent as next logical line
E131 (^) continuation line unaligned for hanging indent
E133 (*) closing bracket is missing indentation
E2 Whitespace
E201 whitespace after ‘(‘
E202 whitespace before ‘)’
E203 whitespace before ‘:’
E211 whitespace before ‘(‘
E221 multiple spaces before operator
E222 multiple spaces after operator
E223 tab before operator
E224 tab after operator
E225 missing whitespace around operator
E226 (*) missing whitespace around arithmetic operator
E227 missing whitespace around bitwise or shift operator
E228 missing whitespace around modulo operator
E231 missing whitespace after ‘,’, ‘;’, or ‘:’
E241 (*) multiple spaces after ‘,’
E242 (*) tab after ‘,’
E251 unexpected spaces around keyword / parameter equals
E261 at least two spaces before inline comment
E262 inline comment should start with ‘# ‘
E265 block comment should start with ‘# ‘
E266 too many leading ‘#’ for block comment
E271 multiple spaces after keyword
E272 multiple spaces before keyword
E273 tab after keyword
E274 tab before keyword
E275 missing whitespace after keyword
E3 Blank line
E301 expected 1 blank line, found 0
E302 expected 2 blank lines, found 0
E303 too many blank lines (3)
E304 blank lines found after function decorator
E305 expected 2 blank lines after end of function or class
E306 expected 1 blank line before a nested definition
E4 Import
E401 multiple imports on one line
E402 module level import not at top of file
E5 Line length
E501 (^) line too long (82 > 79 characters)
E502 the backslash is redundant between brackets
E7 Statement
E701 multiple statements on one line (colon)
E702 multiple statements on one line (semicolon)
E703 statement ends with a semicolon
E704 (*) multiple statements on one line (def)
E711 (^) comparison to None should be ‘if cond is None:’
E712 (^) comparison to True should be ‘if cond is True:’ or ‘if cond:’
E713 test for membership should be ‘not in’
E714 test for object identity should be ‘is not’
E721 (^) do not compare types, use ‘isinstance()’
E722 do not use bare except, specify exception instead
E731 do not assign a lambda expression, use a def
E741 do not use variables named ‘l’, ‘O’, or ‘I’
E742 do not define classes named ‘l’, ‘O’, or ‘I’
E743 do not define functions named ‘l’, ‘O’, or ‘I’
E9 Runtime
E901 SyntaxError or IndentationError
E902 IOError
W1 Indentation warning
W191 indentation contains tabs
W2 Whitespace warning
W291 trailing whitespace
W292 no newline at end of file
W293 blank line contains whitespace
W3 Blank line warning
W391 blank line at end of file
W5 Line break warning
W503 (*) line break before binary operator
W504 (*) line break after binary operator
W505 (*^) doc line too long (82 > 79 characters)
W6 Deprecation warning
W601 .has_key() is deprecated, use ‘in’
W602 deprecated form of raising exception
W603 ‘<>’ is deprecated, use ‘!=’
W604 backticks are deprecated, use ‘repr()’
W605 invalid escape sequence ‘x’
W606 ‘async’ and ‘await’ are reserved keywords starting with Python 3.7
 

标签:常见问题,multiple,whitespace,Python,after,PEP,PEP8,indentation,line
From: https://www.cnblogs.com/datachen/p/16632721.html

相关文章

  • 记录一次网站上传的python代替方法
    网址:https://tool2-mml.sjtu.edu.cn/VRprofile/VRprofile.php这个网站需要上传文件 思路抓包看下网络请求开始看的时候发现没啥然后用wireshark看了下发现文件上传......
  • 6.8 python基础列表元素的添加操作
     #append()list=[10,20,30,40,50,60,70,80]#列表后面添加元素,可以施单个元素或列表整体list.append(20)#后面添加单个元素print(list)list.append([30,90])#后面......
  • Flink数仓项目常见问题总结
    Flink数仓项目常见问题总结 一、开发中的常见bug 1、OutputTag的对象新建问题缺少花括号   Exceptioninthread"main"org.apache.flink.api.common.functi......
  • python读取csv文件
    参考此贴:csv格式文件之csv.DictReader()方法_booze-J的博客-CSDN博客_csv.dictreader官方帮助:csv—CSVFileReadingandWriting—Python3.10.6documentationcsv......
  • Python random 的使用
    导入importrandom 随机数生成//用来生成[a,b]之间的随意整数,包括两个边界值。print(random.randint(0,9))//用来随机生成一个0到1之间的浮点数,包括零。0.15790......
  • Python 报错:json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char
    报错内容:json.decoder.JSONDecodeError:Expectingvalue:line1column1(char0) 报错代码:print(res.json()) 报错原因:打印请求返回值报错该接口返回值......
  • python before_request详解
    before_request顾名思义,就是在request请求之前做的事情。它会在每一个请求来的时候,都会先去请求before_request注册的函数。before_request需要注册一个函数,可以不需要参......
  • python after_request详解
    after_request是在每一个请求结束之后,再请求的一个钩子函数。它需要有一个参数接收请求的响应。这个示例是使用after_request,对每一个请求后的响应进行分类,从而在请求完成......
  • python文件操作 r w a
    文件操作创建文件"asdf.txt"open()#打开file#文件的位置(路径)mode#操作文件的模式encoding#文件编码方......
  • Python_for_else
    循环“自然”终结(循环条件为假)时else从句会被执行一次,而当循环是由break语句中断时,else子句就不被执行。与for语句相似,while语句中的else子句的语意是一样的∶else块在......