python科学计数法转精确小数
时间: 2023-08-31 13:11:17
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python执行精确的小数计算方法
在 Python 中,可以使用 `decimal` 模块来将科学计数法转换成精确小数。以下是一个例子:
```python
from decimal import Decimal
num = Decimal('6.022e23')
print(num)
6.022E+23
如果要将其转换为精确小数,可以使用 `normalize()` 方法:
```python
num = Decimal('6.022e23').normalize()
print(num)
602200000000000000000000
注意,`normalize()` 方法将科学计数法转换为精确小数,但是返回的是 `Decimal` 类型的对象,需要再使用 `float()` 或 `str()` 方法转换为浮点数或字符串类型。例如:
```python
num = Decimal('6.022e23').normalize()
float_num = float(num)
str_num = str(num)
print(float_num, str_num)
6.022e+23 602200000000000000000000
```
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