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...
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...
In this article, you will learn how to format a floating-point value and generate a float number with two decimal places. Example: In the following code, we are calculating the area of a circle. 1 2 3 4 5 6 7 8 import math radius = 5 area = math.pi*radius*radius print("Are...
import random from decimal import Decimal for _ in range(1000000): x = random.random() assert x == float(repr(x)) == float(Decimal(repr(x))) # Reversible repr() assert str(x) == repr(x) assert len(repr(round(x, 12))) <= 14 # no excessive decimal places. Documentation See ...
I have tried to do a :.2f with a print statement, but I am getting an error probably because it is trying to format the keys and the values. So, I'm not sure how to go about formatting all values to 2 decimal places. I'm thinking it would have to be done either in or directl...
print('浮点数转为Decimal后:{0}'.format(decimal_)) # 浮点数转为Decimal后:10.2449999999999992184029906638897955417633056640625 从结果来看,float浮点数转换完成以后精度位数就变得很长不是原先的三位小数了,这是因为float浮点数本身就不精确转换之后才会出现上面的效果。
>>> 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....
ocbc1 = ((c/float(100))*15) ocbc2 = c-ocbc1 if (c > 200): if (bank == 'DBS'): print('Please pay $'+str(dbs2)) elif (bank == 'OCBC'): print('Please pay $'+str(ocbc2)) else: print('Please pay $'+str(c)) ...
format(),三种玩法 replace(),代替字符 is系列 isalnum(),字符串由数字组成 isalpha(),字符串由字母组成 isdigit(),字符串由数字组成 统计元素个数:count 5.在python编程时,碰到需要将字母转换成ascii码的: ord(c):参数是长度为1的字符串,简称字符,当参数为统一对象时(unicodeobject),返回能代表该字符的统一编...
或者做精确的计算,往往会得到意想不到的结果。当然,如果非要用,可以参考decimal模块的相关内容。