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 argument. Returns a copy of the st...
index_string ::= <any source character except"]"> +conversion ::="r"|"s"format_spec ::= <describedinthe next section> 例子: >>>'Bring {0} a {1}'.format('me','apple') # 和C#有点像,数字代表位置'Bring me a apple'>>>'Bring {} a {}'.format('me','apple')'Bring me a ...
453 454 """ 455 return s.center(width, *args) 456 457 # Zero-fill a number, e.g., (12, 3) --> '012' and (-3, 3) --> '-03' 458 # Decadent feature: the argument may be a string or a number 459 # (Use of this is deprecated; it should be a string as with ljust c...
您可以使用str.ljust(width[, fillchar])来完成此操作: Return the string left justified in a string of length width. Padding is done using the specified fillchar (default is a space). The original string is returned if width is less than len(s). 号 >>> 'hi'.ljust(10) 'hi ' 号 @S...
Lazy interpolation, where Python delays the value insertion until the string is needed. In lazy interpolation, you typically create string templates at one point in your code and fill the template with values at another point. To do this type of interpolation, you can use the .format() method...
参考链接: Python 字符串String | isidentifier 4.7.1.字符串方法 字符串实现所有常见的序列操作,以及下面描述的其他方法。 字符串还支持两种类型的字符串格式化的,一个提供了很大程度的灵活性和定制(见str.format(), 格式化字符串的语法和自定义字符串格式化)和其他基于C printf风格的格式,处理范围较窄的类型,是稍...
If you want to fill the remaining places with zero, placing a zero before the format specifier does this. It works both for integers and floats: {:05d} and {:08.3f}. Example 4: Number formatting for signed numbers # show the + sign print("{:+f} {:+f}".format(12.23, -12.23)) ...
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{}'.format('/restconf/operations/huawei-file-operation:delete-file') req_template = string.Template(''' <file-name>$filePath</file-name> <delete-type>$deleteType</delete-type> ''') req_data = req_template.substitute(filePath=file_path, deleteType="unreserved") ret, _, _ = ops_...
-find(str, beg=0, end=len(string))、rfind(str, beg=0,end=len(string)), return the start index or -1; -isnumeric() 如果字符串中只包含数字字符,则返回 True,否则返回 False; -ljust(width[, fillchar])返回一个原字符串左对齐,并使用fillchar(默认空格)填充至长度width的新字符串;同理rjust...