为什么科学记数法中的数字始终被视为float
,如何将字符串转换为' 1e400'到int
(对于float
来说太大了?)
>>>int('1e400')
ValueError: invalid literal for int() with base 10: '1e400'
>>>int(float('1e400'))
OverflowError: cannot convert float infinity to integer
我知道,我可以创建一个类似的功能:
def strtoint(string):
parts = string.split('e')
if len(parts) == 1:
return int(string)
elif len(parts) == 2:
if int(parts[1])<0:
return int(string)
return int(parts[0])*10**int(parts[1])
else:
return int(string) #raise a error if the string is invalid, but if the variable string is not a string, it may have other way to convert to an `int`
但这不是一种非常pythonic的方式,有更好的方法吗?
答案 0 :(得分:10)
也许您可以在转换为int之前使用Decimal
作为中间类型。
>>> import decimal
>>> decimal.Decimal("1e400")
Decimal('1E+400')
>>> int(decimal.Decimal("1e400"))
10000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000000
0