在上述示例中,我们定义了一个convert_to_float_with_2_decimal_places()函数,该函数接受一个字符串参数s,将其转换为浮点数并保留2位小数。然后,我们使用字符串"3.14159"调用该函数,并将返回值打印出来。 总结 本文介绍了如何在Python中将字符串转换为浮点数并保留2位小数。我们通过使用float()函数
You can simply use str method to convert float to String. Let’s understand with the help of simple example. 1 2 3 4 f=1.23444432 print("Converted f to String:",str(f)) Output: Converted f to String: 1.23444432 Let’s say you want to format String to only two decimal places. You ...
Explanation:The code hereuses:.2finside the f-string to round and convert the float value to a string with two decimal places. Methods likeformat()andf-stringsreturn strings, not floats, which matters when doing further calculations. Method 4: Using the “Decimal” Module for Accurate Rounding...
Python3 整型是没有限制大小的,可以当作 Long 类型使用,所以 Python3 没有 Python2 的 Long 类型。 浮点型(float): 浮点型由整数部分与小数部分组成,浮点型也可以使用科学计数法表示(2.5e2 = 2.5 x 102 = 250) 复数(complex): 复数由实数部分和虚数部分构成,可以用a + bj,或者complex(a,b)表示, 复数的...
第2章 Python语法基础 Python数分三·第2章 2.1 Python解释器 运行Python解释器很便捷,在终端里输入python就进入了Python解释器。如果要输出文本“Hello world”,则使用print语句print("Hello world")。 将print("Hello world")保存为Python脚本文件hello_world.py。
data = Decimal(value) I get a TypeError: Cannot convert float to Decimal. First convert the float to a string. But obviously I can't convert it to a string, or else I will lose the precision. So yeah, I'm open to any suggestions -- even really gross/hacky ones if necessary. I'...
用F-String来格式化对象的打印输出 !r —表示调用repr()函数来进行将值转换成字符串!s —表示调用str()函数来进行将值转换成字符串 >>> class Color: def __init__(self, r: float = 255, g: float = 255, b: float = 255): self.r = r self.g = g self.b = b def __...
Formatting with two decimal places value=123.45678formatted_value="{:.2f}".format(value)print(formatted_value)# Output: 123.46print(type(formatted_value))# Output: <class 'str'> The output returns a string. To convert the output to afloat, use thefloat()function. ...
转换数据类型的函数一共有3种:str()、int()和float() 函数 说明 注意 str() 将其他数据类型转成字符串 也可以用引号转换 int() 将其他数据类型转成整数 1.文字类和小数类字符串,无法转成整数 2.浮点数转成整数:抹零取整(非四舍五入) float() 将其他数据类型转成浮点数 文字类数据类型无法转成小数 ...
floating-point hardware, and on most machines are on the order of no more than 1 part in 2**53 per operation. That’s more than adequate for most tasks, but you do need to keep in mind that it’s not decimal arithmetic and that every float operation can suffer a new rounding error...