from decimal import Decimal, ROUND_HALF_UP 然后,可以使用以下代码将数字保留两位小数: number = Decimal('3.14159') rounded_number = number.quantize(Decimal('0.00'), rounding=ROUND_HALF_UP) print(rounded_number) # 输出:3.14 Decimal模块提供了多种舍入模式,可以根据需要选择合适的模式进行四舍五入。 ...
from decimal import Decimal, ROUND_HALF_UP value = Decimal("3.14159") rounded_value = value.quantize(Decimal("0.01"), rounding=ROUND_HALF_UP) print(rounded_value) # 输出:3.14 使用decimal模块的优点是可以更好地控制四舍五入的规则,并且能够处理高精度计算,避免浮点数计算中的精度问题。 四、使用nump...
Learn how to round a number to two decimal places in Python for improved precision using techniques like round(), format(), and string formatting techniques. Aug 8, 2024 · 7 min read Contents How to Round a number to 2 Decimal Places in Python Understanding Rounding and Decimal Places Meth...
getcontext().rounding = getattr(decimal, 'ROUND_CEILING') # It sets the precision of the decimal module to 10. getcontext().prec = 10 # Converting the integer 9 to a string and then converting it to a Decimal object. decimal_ = Decimal(1) / Decimal(str(9)) print('向上取整保留10位...
The round() function in Python is used to round a floating-point number to a specified number of decimal places. If the specified number of decimal places is omitted, it rounds to the nearest integer. Here's an example of how the round() function works: python # Rounding to the nearest...
在Python中,我们可以使用内置的round()函数来截断浮点数后面的小数。不进行舍入的方法是将小数部分与整数部分相加后取整数部分,可以使用math模块中的floor()函数或者int()函数来实现...
Write a Python program to truncate a floating-point number without rounding. Write a Python program to round a list of floating-point numbers to two decimal places. Python Code Editor: Previous:Write a Python program to create a bytearray from a list. ...
'''Truncates/pads a float f to n decimal places without rounding''' s = '%.12f' % f i, p, d = s.partition('.') return '.'.join([i, (d+'0'*n)[:n]]) 解释 底层方法的核心是以全精度将值转换为字符串,然后将超出所需字符数的所有内容切掉。后一步很容易;它可以通过字符串操作来...
sys from decimal import * getcontext().rounding = ROUND_FLOOR sys.setrecursionlimit(100000) pyth...
首先需要导入Decimal模块: from decimal import Decimal, ROUND_HALF_UP 创建Decimal对象 可以通过将字符串转换为Decimal对象来创建Decimal对象: number = Decimal("3.14159") 保留两位小数 可以使用quantize()方法来保留指定的小数位数: rounded_number = number.quantize(Decimal("0.00"), rounding=ROUND_HALF_UP) ...