下面是完整的代码实现: deffloat_to_two_decimal_places(number):number_str=str(number)result_str="{:.2f}".format(number)result=float(result_str)returnresult 1. 2. 3. 4. 5. 四、示例使用 我们可以通过以下代码来测试我们的函数: result=float_to_two_decimal_places(3.1415926)print(result) 1. 2...
How to Round a number to 2 Decimal Places in Python The simplest method to round a number to two decimal places in Python is by using the built-in round() function, which is pretty straightforward. # Using the round() function to round a number to two decimal places rounded_number =...
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，函数体中调用Decimal类型的 quantize() 方法。6 ...
下面是一个完整的示例,将字符串转换为两位小数数字: defconvert_to_two_decimal_places(num_str):num_float=float(num_str)formatted_num="{:.2f}".format(num_float)returnfloat(formatted_num)num_str="3.14159"result=convert_to_two_decimal_places(num_str)print(result)# 输出:3.14 1. 2. 3. 4. 5...
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...
You can also specify text alignment using the greater than operator:>. For example, the expression{:>3.2f}would align the text three spaces to the right, as well as specify a float number with two decimal places. Conclusion In this article, I included an extensive guide of string data typ...
# 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...
源码: Lib/decimal.py decimal 模块为快速正确舍入的十进制浮点运算提供支持。 它提供了 float 数据类型以外的几个优点: Decimal 类型的“设计是基于考虑人类习惯的浮点数模型,并且因此具有以下最高指导原则—— 计算机必须提供与人们在学校所学习的算术相一致的算术。”—— 摘自 decimal 算术规范描述。 Decimal 数字...
Challenge: Write a function to compute the area of a circle rounded off to two decimal places. The area of a circle is calculated using the formulapi * radius^2. For example, ifradius = 5, the expected output is78.54. (radius):
decimal places: 0.912 # 科学计数法表示 fstring = f'Exponent format for number: {number:e}' print(fstring) # Exponent format for number: 9.124325e-01 # 带货币符号 number = 123456.78921 fstring = f'Currency format for number with two decimal places: ${number:.2f}' print(fstring) # ...