'{a:0^10}'.format(a=12.3,b=13.44) #两边对齐... '{{ hello {0} }}'.format('python') #转义{和}符号 f = ' hello {0} '.format f('python')#这里可以把format当作一个函数来看 五、面试题 1.请将带下划线风格的字符串转换成驼峰风格的输出(例子:python_test_string ===>PythonTestString)...
str.format(*args, **kwargs) Perform a string formatting operation. The string on which this method is called can contain literal text or replacement fields delimited by braces {}. Each replacement field contains either the numeric index of a positional argument, or the name of a keyword argum...
Python输出格式化 格式化字符串语法 1.format 1.1 Format String Syntax 格式字符串语法 str.format() 方法和 Formatter 类共享相同的格式字符串语法(尽管在 Formatter 的情况下,子类可以定义自己的格式字符串语法)。 语法与格式化字符
replacement_field ::= "{" [field_name] ["!" conversion] [":" format_spec] "}" field_name ::= arg_name ("." attribute_name | "[" element_index "]")* arg_name ::= [identifier | digit+] attribute_name ::= identifier element_index ::= digit+ | index_string index_string ::...
Python’s f-strings support two flags with special meaning in the interpolation process. These flags are closely related to how Python manages the string representation of objects. These flags are:FlagDescription !s Interpolates the string representation from the .__str__() method !r Interpolate...
You can format numbers using the format specifier given below: Number Formatting Types TypeMeaning d Decimal integer c Corresponding Unicode character b Binary format o Octal format x Hexadecimal format (lower case) X Hexadecimal format (upper case) n Same as 'd'. Except it uses current locale...
ComponentMeaning % Introduces the conversion specifier <flags> Indicates one or more flags that exert finer control over formatting <width> Specifies the minimum width of the formatted result .<precision> Determines the length and precision of floating-point or string output <type> Indicates the type...
Decodes the string using the codec registered for encoding. encoding defaults to the default string encoding. errors may be given to set a different error handling scheme. The default is 'strict', meaning that encoding errors raise UnicodeError. Other possible values are 'ignore', 'replace' and...
A string is a sequence of one or more characters (letters, numbers, symbols) that can be either a constant or a variable. Made up of Unicode, strings are immutable sequences, meaning they are unchanging. Because text is such a common form of data that we use in everyday life, the str...
F-strings can be nested, meaning an f-string can be part of an expression inside another f-string. This allows for complex, dynamic string constructions, though it's important to maintain readability by not overusing deep nesting. main.py ...