济南新网站建设,做网站可以使用rem单位吗,小红书app下载安装,网站本地环境搭建Win11查看安装的Python路径及安装的库
Python3(基础|高级)语法实战(|多线程|多进程|线程池|进程池技术)|多线程安全问题解决方案
Python PEP8 代码规范常见问题及解决方案
Python3操作MySQL8.XX创建表|CRUD基本操作
Python3操作SQLite3创建表主键自增长|CRUD基本操作
anac… Win11查看安装的Python路径及安装的库
Python3(基础|高级)语法实战(|多线程|多进程|线程池|进程池技术)|多线程安全问题解决方案
Python PEP8 代码规范常见问题及解决方案
Python3操作MySQL8.XX创建表|CRUD基本操作
Python3操作SQLite3创建表主键自增长|CRUD基本操作
anaconda3最新版安装|使用详情|Error: Please select a valid Python interpreter
Python函数绘图与高等代数互融实例(一):正弦函数与余弦函数
Python函数绘图与高等代数互融实例(二):闪点函数
Python函数绘图与高等代数互融实例(三):设置X|Y轴|网格线
Python函数绘图与高等代数互融实例(四):设置X|Y轴参考线|参考区域
Python函数绘图与高等代数互融实例(五): 则线图综合案例 一: Python 的 EP8 代码规范P简介
所以将常见的 PEP8 代码规范问题和解决方法记录一下学习一下遇到了再持续更新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 linesfound 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 altEnter选择忽略Ignore这个错误即可 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IDID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IDE101 即可 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 code sample 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 二: PEP 8: E101 indentation contains mixed spaces and tabs 解决方案 如上图由于不规范的缩进,PyCharm工具自动识别到缩进包含多个空格或制表位,导致不符合 EP8 代码规范,警告信息: PEP 8: E101 indentation contains mixed spaces and tabs
通常有两种解决方式: 2.1: 划线部分的代码,缩进一个tab制表位,或者两个制表位: 2.2: file--setting--检索框中输入PEP 8,然后去掉下图箭头所指的两个复选框即可---》确认即可
