number = decimal.Decimal('1.23E-4') percent = "{:.2%}".format(number) print(percent) # 输出: 0.01% 详细解析 在这个示例中,我们首先创建了一个使用科学计数法表示的Decimal对象number,然后使用format()函数将number格式化为百分数,并保留两位小数。通过使用decimal模块,可以
percentage = locale.format_string("%.2f%%", number * 100) print(percentage) # 输出依赖于系统区域设置 六、总结 在Python中将小数显示为百分数可以通过多种方法实现,其中f-string是最推荐的,因为它简单直观。此外,format()函数和格式化字符串也非常有用,尤其在处理更复杂的字符串格式时。而使用decimal模块则...
decimals=[0.123,0.456,0.789]formatted_perc=[format_percentage(dec)fordecindecimals]forpercinformatted_perc:print(perc) 1. 2. 3. 4. 5. 6. 7. 8. 在上面的代码中,我们定义了一个函数format_percentage,接受两个参数,一个是小数decimal,另一个是保留的小数位数decimals,默认为2。然后我们定义了一个包...
NumberFormatter+format(float number, str format)+formatAsPercentage(float number, int decimalPlaces)DecimalFormatter+formatToDecimal(float number, int decimalPlaces)PercentageFormatter+formatToPercentage(float number, int decimalPlaces) 在这个类图中,NumberFormatter作为主要的格式化类,它可以调用DecimalFormatter和...
The format specifier {:.2f} rounds the number to 2 decimal places. The function is similar to the string format method but called as a standalone function. It's useful when you need to format values dynamically. Number FormattingThe format function provides extensive options for number ...
You can use the % modifier by itself, in which case you’ll get as many decimal digits as Python returns. It’s important not to confuse this use of the percentage symbol (%) with the modulo operator. In the context of a format specifier, the symbol has a different meaning. Remove ...
>>> ratio = 0.9 >>> f"Over {ratio:.1%} of Pythonistas say 'Real Python rocks!'" "Over 90.0% of Pythonistas say 'Real Python rocks!'" >>> # Display percentage with 2 decimal places >>> f"Over {ratio:.2%} of Pythonistas say 'Real Python rocks!'" "Over 90.00% of Python...
d Decimal integer e or E Exponential f or F Floating-point number g or G Floating-point or exponential number n Decimal integer o Octal integer s String x or X Hexadecimal integer % Percentage valueThe first presentation type you have is b, which designates binary integer conversion:Python...
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...
'_' - Use a underscore as a thousand separator 'b' - Binary format 'c' - Converts the value into the corresponding unicode character 'd' - Decimal format 'e' - Scientific format, with a lower case e 'E' - Scientific format, with an upper case E 'f' - Fix point number format ...