defround_to_two_decimal_places(number):return'{:.2f}'.format(number) 1. 2. 以上代码定义了一个名为round_to_two_decimal_places的函数,它接受一个数字作为输入,并返回保留两位有效数字并自动补0的结果。 示例 假设我们有一个数值列表[0.123, 1.234, 12.345, 123.456,
defformat_to_two_decimal_places(value):try:# 转换为浮点数float_value=float(value)# 使用字符串格式化formatted_value="{:.2f}".format(float_value)returnformatted_valueexceptValueError:return"输入无效,请输入有效的数字。"# 测试输出print(format_to_two_decimal_places(3.1))# 输出 '3.10'print(format_...
1 首先在PyCharm软件中,打开一个Python项目。2 在Python项目中,新建并打开一个空白的python文件(比如:test.py)。3 在python文件编辑区中,输入:“import decimal”,导入 decimal 模块。4 接着输入:“TWOPLACES = decimal.Decimal(10) ** -2”,点击Enter键。5 使用 def 关键字定义一个 div 函数,函数...
percentage = "{:.2f}%".format(value) # format the value to a string with 2 decimal places and append a "%" sign print(percentage) # output: 50.00% (2)使用f-string python value = 0.5 # 50% in decimal form percentage = f"{value:.2f}%" # format the value to a string with...
将数字格式化后输出,并控制数字的位数、对齐、千位分隔符和其他的细节 x = 1234.56789#Two decimal places of accuracyprint(format(x,'0.2f'))#'1234.57'#Right justified in 10 chars, one-digit accuracyprint(format(x,'>10.1f'))#'1234.6'#Left justifiedprint(format(x,'<10.1f'))#'1234.6 '#Centered...
In the example below, :.2f is used within the curly brackets to specify the number is rounded to two decimal places. The code will print 3.14. # Example number to be rounded number = 3.14159 # Using str.format() to round to 2 decimal places formatted_number = "{:.2f}".format(...
# Let's assume we have a dataframe dfdf = pd.DataFrame({ 'A': [1, 2, 3, 4], 'B': [0.1, 0.2, 0.3, 0.4]})# We want to format the values in column B as text with two decimal placesdf['C'] = df['B'].apply(lambda x: '{:.2f}'.format(x))print(df)SUBST...
>>> 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度 >>> print(f'{num}')4.123956 格式化百分比数 >>> total = 87>>> true_pos = 34>>> perc = true_pos / total>>> perc0....
Decimal.quantize()方法用于将Decimal数值按照给定的小数位数进行四舍五入或截断。如果希望强制保留两位小数,可以将小数位数设置为2,并选择四舍五入方式。 以下是一个示例代码: 代码语言:txt 复制 from decimal import Decimal, ROUND_HALF_UP def enforce_two_decimal_places(number): decimal_number = Decimal(str...
pi = 3.141592653589793 formatted_string = "Pi is approximately {:.2f} or {:.5f} decimal places.".format(pi, pi) print(formatted_string) # 输出:Pi is approximately 3.14 or 3.14159 decimal places.注意事项 在使用format函数时,有一些技巧和注意事项可以帮助你更有效地使用它。了解不同的...