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...
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)) ...
我想用空格填充一个字符串。我知道以下内容适用于Zero: >>> print "'%06d'"%4 '000004' 1. 2. 但是如果我想要这个怎么办?: 'hi ' 号 当然,我可以测量弦长,也可以做str+""*leftover,但我想要最短的方法。 您可以使用str.ljust(width[, fillchar])来完成此操作: ...
{0:<09.6g}EN字符串的内置方法大致有40来个，但是一些常用的其实就那么20几个，而且里面还有类似的...
Fixed format: 123.457 Adaptive format: 12345.7 Custom Fill Characters and Alignments F-strings support custom fill characters for padding when aligning text. Instead of just spaces or zeros, you can use any character to fill the extra space, which is useful for creating visual separators or decora...
str.center(width[, fillchar]) Return centered in a string of length width. Padding is done using the specified fillchar (default is a space). Changed in version 2.4: Support for the fillchar argument. str.count(sub[, start[, end]]) 返回sub子串的数量 ...
String objects have one unique built-in operation. the % operator (modulo). This is also known as the string formatting or interpolation operator. Given format % values (where format is a string), % corversionspecifications in format are replaced with zero or more elements of values. The eff...
Zero-padding The0Ndformat specifier (whereNis a whole number) will format a number to beNdigits long (by zero-padding it on the left-hand side). Here's a list of numbers formatted to be 2 digits long (with02d): >>>tracks=[(1,"Harlem"),(3,"Grandma's Hands"),(10,"Moanin' and...