在Python中将字符串转换为浮点数

Question

I am trying to convert a string into floating point in Python: I have the following Unicode string which I want to convert to 0.02 floating point:

t = (data["streams"][0]["time_base"]) 
print t

And this is the output u'1/50'

I am writing a program which is extracting information from a JSON file and in the future I will need to convert similar strings and I want to automate the process.

Answer 1

You can split at / , convert to floats, and divide the numbers:

>>> num1, num2 = [float(x) for x in t.split('/')]
>>> num1 / num2
0.02