percentage = f"{value:.2f}%" # format the value to a string with 2 decimal places and append a "%" sign print(percentage) # output: 50.00% 在Python中，我们可以使用多种方法来输出百分比。最常用的方法是使用print()函数和格式化字符串。从Python 3.6开始，推荐使用f-strings(格式化字符串字面...
Round to 2 decimal places using string formatting techniques String formatting techniques are useful for rounding numbers to two decimal places, especially when displaying the number in the output. Keep in mind that when you use string formatting techniques in Python to round a number, the rounded...
On the other hand, we might want to format the numerical output of a float variable. For example, in the case a product with taxes: In this case between thecurly bracketswe’re writing a formatting expression. These expressions are needed when we want to tell Python to format our values ...
output is printed>>> f"{c!r}"'Color(r=123, g=32, b=255)'# Same as the default>>> f"{c!s}"'A RGB color'格式化浮点数 >>> num = 4.123956>>> f"num rounded to 2 decimal places = {num:.2f}"'num rounded to 2 decimal places = 4.12'如果不做任何指定，那么浮点数用最大精...
>>> n = 1 + 2j When you inspect the value of n, you’ll notice that Python wraps the number with parentheses: Python >>> n (1+2j) This convention helps eliminate any confusion that the displayed output may represent a string or a mathematical expression. Imaginary numbers come wi...
1：二分法 求根号5 a:折半： 5/2=2.5 b:平方校验: 2.5*2.5=6.25>5，并且得到当前上限2.5 c:再次向下折半:2.5/2=1.25 d:平方校验：1.25*1.25=1.5625<5,得到当前下限1.25 e:再次折半:2.5-(2.5-1.25)/2=1.875 f:平方校验：1.875*1.875=3.515625<5,得到当前下...
2.1.2 交互式模式 1. 进入方式 2. 提示符 >>> 1. Cmd Copy 区别 py 文件只能在命令行中运行; Python 交互模式的代码是输入一行、执行一行;而命令行模式下直接运行 .py 文件是一次性执行该文件内的所有代码。 2.2 数据类型和变量 2 #整数 (int) ...
DataFrame.to_string([buf, columns, …]) #Render a DataFrame to a console-friendly tabular output. DataFrame.to_clipboard([excel, sep]) #Attempt to write text representation of object to the system clipboard This can be pasted into Excel, for example. ...
decimal : str, default '.' Character recognized as decimal separator, e.g. ',' in Europe. bold_rows : bool, default True Make the row labels bold in the output. classes : str or list or tuple, default None CSS class(es) to apply to the resulting html table. escape : bool, ...
Example 4-21 shows the use of unicodedata.name() and unicodedata.numeric() along with the .isdecimal() and .isnumeric() methods of str. Example 4-21. Demo of Unicode database numerical character metadata (callouts describe each column in the output) import unicodedata import re re_digit ...