Besides numbers, Python can also manipulate strings. You can enclose strings in single (') or double (") quotation marks with the same result. Use a backslash (\) to escape quotation marks you want to use within the string itself. Here's an example that uses single quotation marks. ...
-- 设置不同错误的处理方案。默认 'strict',意为编码错误引起一个UnicodeError。 其他得值有 'ignore', 'replace', 'xmlcharrefreplace', 'backslashreplace' 以及通过 codecs.register_error() 注册的任何值。 值: 该方法返回编码后的字符串,它是一个 bytes 对象。
# 错误方式: print(f'{\'name\'} is a full stack hacker.') # SyntaxError: f-string expression part cannot include a backslash 3.2 打印双括号{} 用f字符串打印{}的方法是不同的, 非常容易出bug。这次我们不能使用反斜线。 name = 'Yang' # 1 print(f'{name} is a full stack hacker.') #...
AI代码解释 name='Yang'# Correct Way:print(f'\'{name}\' is a full stack hacker.')#'Yang'is a full stack hacker.# 错误方式:print(f'{\'name\'} is a full stack hacker.')# SyntaxError:f-string expression part cannot include a backslash 3.2 打印双括号{} 用f字符串打印{}的方法是不...
W1401(anomalous-backslash-in-string) 原因分析:含"\“的字符可能缺少前缀r 处理意见:如果存在“\”,则在字符串前加r W0201(attribute-defined-outside-init) 原因分析:显式的设置了一个初始化时不存在的属性 处理意见:不要显式的去设置一个不存在的属性,在__init__函数中设置 ...
errors默认值为"strict",意思是UnicodeError。可能的值还有'ignore', 'replace', 'xmlcharrefreplace', 'backslashreplace' 和所有的通过codecs.register_error注册的值。这一部分内容涉及codecs模块,不是特明白 S.decode([encoding,[errors]]) 字符串的测试函数,这一类函数在string模块中没有,这些函数返回的都是...
meaning that encoding errors raise a UnicodeError. Other possible values are 'ignore', 'replace', 'xmlcharrefreplace', 'backslashreplace' and any other name registered via codecs.register_error(), see section Codec Base Classes. For a list of possible encodings, see section Standard Encodings....
errors – 设置不同错误的处理方案。默认为 ‘strict’,意为编码错误引起一个UnicodeError。 其他可能得值有 ‘ignore’, ‘replace’, ‘xmlcharrefreplace’, ‘backslashreplace’ 以及通过 codecs.register_error() 注册的任何值。 注意:函数decode是把字符串解码成unicode编码,而不是encoding代表的编码,参数encod...
To escape a curly bracket, we double the character. A single quote is escaped with a backslash character. $ python main.py Python uses {} to evaluate variables in f-strings This was a 'great' film Python f-string format datetime
sub) Help on function sub in module re: sub(pattern, repl, string, count=0, flags=0) Return the string obtained by replacing the leftmost non-overlapping occurrences of the pattern in string by the replacement repl. repl can be either a string or a callable; if a string, backslash ...