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...
# dynamic string format templatestring ="{:{fill}{align}{width}}"# passing format codes as argumentsprint(string.format('cat', fill='*', align='^', width=5))# dynamic float format templatenum ="{:{align}{width}.{precision}f}"# passing format codes as argumentsprint(num.format(123.23...
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 ...
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...
In the first example, you add zero padding to the input value. Next, you have an example of how to use the minus sign to align a value to the left in a width of ten characters. The space flag allows you to add a space before positive numbers. This space disappears when the value ...
The string is never 452 truncated. If specified the fillchar is used instead of spaces. 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 ...
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...
除了上述基本的字符串运算符,Python还提供了多种字符串格式化方法,如format()方法、f-string(格式化字符串字面值)等。 使用format()方法: name = "Alice" age = 25 print("My name is {} and I am {} years old.".format(name, age)) # 输出:My name is Alice and I am 25 years old. 使用f-...
Instead of empty braces, the substitution is to use numbers. The{0}means to use the first (index of zero) argument to.format(), which in this case isMoon. For simple repetition{0}works well, but it reduces readability. To improve readability, use keyword arguments in.format()and then ...
24.zfill():这里的z指zero,用0将字符填充到指定长度 25.title(), 标题格式,就是首字母大写,其它字符小写。 26.find(sub[,start[,end]]):返回子字符串子所在的S中最低的索引,这样子字符串包含在S[start:end]中。可选参数的开始和结束被解释为片表示法。