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()函数将字符串转换为...
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 ...
@EVERYBODY: You don't need to convert a float to a decimal to preserve the precision. The whole point of the repr() function is that the following is guaranteed: float(repr(a_float)) == a_float Python 2.X (X <= 6) repr gives a constant 17 decimal digits of precision, as that ...
from decimalimportDecimal # 精确表示0.1decimal_value=Decimal('0.1')print(decimal_value+decimal_value+decimal_value==Decimal('0.3'))# 输出True 如上例所示,Decimal类型能够精确处理我们希望为精确的十进制数。 float和Decimal的性能考量 尽管Decimal能提供更高的精度,但这也意味着牺牲了性能。由于float是使用硬...
从float到Decimal的直接转换是在python-2.7中实现的,在Decimal的构造函数和Decimal.from_float()类方法中都是如此.Python-2.6反而抛出一个TypeError建议首先转换为字符串:TypeError: Cannot convert float to Decimal. First convert the float to a string
1) 浮点转Decimal from decimal import * a=7.133333333 print type(a)===>float b=Decimal.from_float(a) print type(b)===>Decimal a-b<0.00001 ===>True 简介 decimal意思为十进制,这个模块提供了十进制浮点运算支持。 常用方法 1.可以传递给Decimal整型或者字符串参数,但不能是浮点数据,因为浮点数据本...
Convert float to String in Python Read more → Format a float to 2 decimal places in Python Read more → Using the math module functions to convert float to int in Python The math module can be defined as an always accessible and standard module in Python. It provides the access to ...
def regex_comma_to_float(string_value): # Remove all non-numeric characters except decimal point cleaned_string = re.sub(r'[^\d.]', '', string_value) # Convert to float and return return float(cleaned_string) # Example usage
We again got the corresponding integers to the floats in float_list. Great! Example 3: Convert List from Float to Integer using NumPy ArrayIn this third and final example, we will use Python’s NumPy library to convert the list of floats to integers. First, though, we will need to ...
It’s important to note that, if you want a string representation, you must convert it. # Define a floating-point valuevalue=123.45678formatted_value=round(value,3)print("Three decimals:",formatted_value)# Output: 123.457formatted_value=round(value,2)print("Two decimals:",formatted_value)#...