Python Insert Variables into String

Question

So i'm not great at regular expressions but i'd like to insert variables into a string. My string will look something like this (just a random example):

(%foo% * 3) / 2

And I would need to insert variables into it, %foo% being the name of the variable I need to use and might end up looking like this:

(4 * 3) / 2

I know I could do this using string formatting but each string may require different variables. Is there a good way that I can just create a regular expression that will swap out the placeholders with the variables?

alecxe · Accepted Answer · 2014-06-04 19:06:29Z

2

You can still use string formatting with named arguments:

>>> "{foo}, {bar}".format(foo=2, bar=4)
'2, 4'

answered Jun 4, 2014 at 19:06

alecxe

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2 Comments

Callum Over a year ago

Thankyou. If I parse values but they are not used would it error?

alecxe Over a year ago

@CallumBonnyman it's ok: "{foo}, {bar}".format(foo=2, bar=4, test=5) would result into 2, 4 too.

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