def truncate_to_two_decimal_places(number): if isinstance(number, str): number = float(number) return round(number, 2) result = truncate_to_two_decimal_places(3.14159) print(result) # 输出: 3.14 以上方法均能有效地截取浮点数或字符串表示的数字的小数点后两位。根据具体需求选择合适的方法即可。
以上代码中,我们定义了一个名为truncate_float()的函数,该函数接受两个参数:num为要进行截断的浮点数,decimal_places为要保留的小数位数。函数内部通过将浮点数拆分为整数部分和小数部分,然后截断小数部分,并将结果返回。 使用示例: 代码语言:txt 复制 num = 3.141592653589793 decimal_places = 3 result = trunc...
def trunc_introspect(f, n): '''Truncates/pads the float f to n decimal places by looking at the caller's source code''' current_frame = None caller_frame = None s = inspect.stack() try: current_frame = s[0] caller_frame = s[1] gen = tokenize.tokenize(io.BytesIO(caller_frame...
def__trunc__(self):"""Truncates self to an Integral.Returns an Integral i such that:*i>=0iff self>0;*abs(i)<=abs(self);*forany Integral j satisfying the first two conditions,abs(i)>=abs(j)[i.e.i has"maximal"abs among those].i.e."truncate towards 0".""" raise NotImplemente...
我们从 Number 类开始,它是人们想象的数字类型的模糊概念。此类仅用于重载;它不提供任 何操作。 class Number(metaclass=ABCMeta): pass 大多数复数(complex number)的实现都是可散列的,但是如果你需要依赖它,则必须明确地 检查:此层次结构支持可变的数。
As you can see, the pi value is given to fifteen decimal places in Python. The number of digits provided depends on the underlying C compiler. Python prints the first fifteen digits by default, and math.pi always returns a float value.So what are some of the ways that pi can be ...
Get rid of it?@abstractmethoddef__float__(self):"""Any Real can be converted to a native float object."""raiseNotImplementedError@abstractmethoddef__trunc__(self):"""Truncates self to an Integral. Returns an Integral i such that:
2.比较运算 3.赋值运算 4.逻辑运算 5.成员运算 二、基本数据类型 1.数字 整数的位数为32位,取值范围为-2**31～2**31-1,即-2147483648～2147483647,在64位系统上,整数的位数为64位,取值范围为-2**63～2**63-1,即-9223372036854775808～9223372036854775807 1.2 有关number模块代码如下所示: 1 class Number...
Write a Python program to round a floating-point number to the nearest integer. Write a Python program to format a float with a specified number of decimal places. Write a Python program to truncate a floating-point number without rounding. ...
The following example rounds pi to three places after the decimal:>>> >>> import math >>> print(f'The value of pi is approximately {math.pi:.3f}.') The value of pi is approximately 3.142. Passing an integer after the ':' will cause that field to be a minimum number of ...