Python: Replace integers by floats in string

Question

I'm looking for a way, to replace every number inside a string by a float number. So I'd turn this: "3/1" to this: "3.0/1.0" Is there a way to do this?

any type of number (integer, real, complex..) or integers only? — Pynchia
– Pynchia, Commented Jun 13, 2015 at 21:21

Kasravnd · Accepted Answer · 2015-06-13 20:25:21Z

4

You can use re.sub :

>>> s="3/1" 
>>> import re
>>> re.sub(r'(\d+)',r'\1.0',s)
'3.0/1.0'
>>> s="334/14" 
>>> re.sub(r'(\d+)',r'\1.0',s)
'334.0/14.0'

answered Jun 13, 2015 at 20:25

Kasravnd

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6 Comments

d0n.key Over a year ago

But - wait. If I insert a string like "1/30" it does weird things. ("3.00.0") is there another way? - EDIT: Solved. (\d+)

Padraic Cunningham Over a year ago

@d0n.key, you must be doing weird things then because you should not get that.

d0n.key Over a year ago

Just solved it, by changing (\d) in the function to (\d+)

MattDMo Over a year ago

@d0n.key if this answered your question, please accept it by clicking on the check mark to turn it green.

Malik Brahimi Over a year ago

If the string contains a decimal number, this will screw things up.

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Padraic Cunningham · Accepted Answer · 2015-06-13 20:34:20Z

2

If they are single strings always in the same format:

s = "3/1"


print("{}.0/{}.0".format(*s.split("/")))

answered Jun 13, 2015 at 20:34

Padraic Cunningham

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