1>>>print('%s'%'hello world')#字符串输出2hello world3>>>print('%20s'%'hello world')#右对齐,取20位,不够则补位4hello world5>>>print('%-20s'%'hello world')#左对齐,取20位,不够则补位6hello world7>>>print('%.2s'%'hello world')#取2位8he9
将数值乘以100然后以fixed-point('f')格式打印,值后面会有一个百分号。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 1 >>> print('{0:b}'.format(3)) 2 11 3 >>> print('{:c}'.format(20)) 4 5 >>> print('{:d}'.format(20)) 6 20 7 >>> print('{:o}'.format(20)) 8...
Python 3.8 introduced a handy feature for debugging: the self-documenting expression. By adding an equals sign (=) after an expression in an f-string, Python will print both the expression and its value, making it easier to trace calculations and variable states. main.py #!/usr/bin/python ...
>>>help(sum)sum(iterable,/,start=0)Return the sumofa'start'value(default:0)plus an iterableofnumbers When the iterable is empty,returnthe start value.Thisfunctionis intended specificallyforusewithnumeric values and may reject non-numeric types. 复制 内置函数sum是用 C 编写的,但typeshed为其提供...
Constant width bold 显示用户应按字面意思键入的命令或其他文本。 Constant width italic 显示应由用户提供的值或由上下文确定的值替换的文本。 提示 此元素表示提示或建议。 注意 此元素表示一般注释。 警告 此元素表示警告或注意事项。 使用代码示例 书中出现的每个脚本和大多数代码片段都可在 GitHub 上的 Fluent ...
This function must return a unicode string and will be applied only to the non-``NaN`` elements, with ``NaN`` being handled by ``na_rep``. .. versionchanged:: 1.2.0 sparsify : bool, optional, default True Set to False for a DataFrame with a hierarchical index to print every ...
非替代字段的字符都被作为字符串字面量(string literals); 如果字符串字面量(string literal)中仅单纯的表示一对花括号字符, 可通过双花括号转义。 str4 = '{{}}, {}' print(str4.format('渔道')) # nested name_width = 10 price_width = 10 ...
f-string,亦称为格式化字符串常量(formatted string literals),是Python3.6新引入的一种字符串格式化方法,该方法源于PEP 498 – Literal String Interpolation,主要目的是使格式化字符串的操作更加简便。f-string在形式上是以 f 或 F 修饰符引领的字符串(f'xxx' 或 F'xxx'),以大括号 {} 标明被替换的字段;f-...
>>>print(f"Variables:{full_name=},{costs=}")Variables: full_name='Trey Hunner', costs=[1.1, 0.3, 0.4, 2] How do these differentf-string modifierswork and what can you do with them? String formatting works differently on different types of objects. Let's look at some common objects ...
# integer numbers with minimum widthprint("{:5d}".format(12))# width doesn't work for numbers longer than paddingprint("{:2d}".format(1234))# padding for float numbersprint("{:8.3f}".format(12.2346))# integer numbers with minimum width filled with zerosprint("{:05d}".format(12))#...