Learn how to round a number to 2 decimal places in Python for improved precision using techniques like round(), format(), and string formatting techniques.
rounding=ROUND_HALF_UP) return enforced_number # 示例使用 number = 10 enforced_number = enforce_two_decimal_places(number) print(enforced_number) # 输出:10.00
1、Python四舍五入,round函数用于精度没有要求的地方 整数及保留一位小数的时候使用round函数,可以正常四舍五入 2、decimal模块处理四舍五入,用于精度有要求的地方 Decimal.Context(prec=3,rounding=ROUND_HALF_UP).create_decimal(string类型)返回正常的四舍五入的答案 本节知识视频教程 本节课程我们学习数字格式化...
Python’s built-in round() function uses the rounding half to even strategy, which rounds numbers like 2.5 to 2 and 3.5 to 4. This method helps minimize rounding bias in datasets. To round numbers to specific decimal places, you can use the round() function with a second argument ...
As the name implies, this can introduce a bias: if all the unrounded numbers had four decimal places, say, then in our example theexpectedaverage of the rounded numbers will be 0.0005 higher than that of the unrounded numbers. [edit] Round-to-even method ...
print(round(3.447444, 2)) >>3.45 from decimal import Decimal print(Decimal('0.3') + Decimal('0.9')) >>1.2 import math #向上取
1It’s easy to forget that the stored value is an approximation to the original decimal fraction...
round(a,2) ‘%.2f’ % a Decimal(‘5.000’).quantize(Decimal(‘0.00’)) 当需要输出的结果要求有两位小数的时候,字符串形式的:’%.2f’ % a 方式最好,其次用Decimal。 需要注意的: 可以传递给Decimal整型或者字符串参数,但不能是浮点数据,因为浮点数据本身就不准确。
high, adjusted low, adjusted close and volume rounded to 4 decimal places """ if not (ALPHA_VANTAGE_DIR_PATH / f"{ticker}.csv").exists(): return None df = pd.read_csv( ALPHA_VANTAGE_DIR_PATH / f"{ticker}.csv", index_col=0, parse_dates=True ...
price# instance methoddef make_coffee(self):print(f'Making {self.specialty}for ${self.coffee_price}')# static method @staticmethoddef check_weather():print('Its sunny') # class method@classmethoddef change_specialty(cls, specialty):cls.specialty = specialtyprint(f'Specialty changed to{spec...