Convert string into floating point in Python

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.

Possible duplicate of How do I convert unicode characters to floats in Python? — Svekke
– Svekke, Commented Feb 3, 2017 at 14:31
what can be your unicode strings? apart from 1/50 I mean. Are those always fractions? something else? — Jean-François Fabre
– Jean-François Fabre ♦, Commented Feb 3, 2017 at 14:34
@Svekke when I try your method I got an error: TypeError: need a single Unicode character as parameter — Georgi Stoyanov
– Georgi Stoyanov, Commented Feb 3, 2017 at 14:36
@Jean-FrançoisFabre there are always fractions, actually this is the framerate represented as a fraction so it is always 1/24, 1/25, 1/59.94, 1/60 and so on. — Georgi Stoyanov
– Georgi Stoyanov, Commented Feb 3, 2017 at 14:37

Mike Müller · Accepted Answer · 2017-02-03 14:49:53Z

4

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

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

edited Feb 3, 2017 at 14:49

answered Feb 3, 2017 at 14:42

Mike Müller

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