Python数据unicode转换

Question

I have the following list:

list = [u'0', u'FF', u'7', u'0', u'FF', u'FFF', u'FFF']

and I need to use the elements as integer or float but when I try convevrting I get the following error:

>>> float(list[1])
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
ValueError: could not convert string to float: FF

Is there any way of solving this?

Answer 1

You can not convert that hex values to float directly, instead you can convert to int with specifying a proper base using int() function :

>>> l = [u'0', u'FF', u'7', u'0', u'FF', u'FFF', u'FFF']
>>> [int(i,16) for i in l]
[0, 255, 7, 0, 255, 4095, 4095]

Or use float on int values :

>>> [float(int(i,16)) for i in l]
[0.0, 255.0, 7.0, 0.0, 255.0, 4095.0, 4095.0]