Output variable value in a string

Question

In Ruby I can do this:

"This is a string with the value of #{variable} shown."

How do I do that same thing in Python?

score 3 · Answer 1 · 2014-07-23T16:09:33.870

3

The modern/preferred way is to use str.format:

"This is a string with the value of {} shown.".format(variable)

Below is a demonstration:

>>> 'abc{}'.format(123)
'abc123'
>>>

Note that in Python versions before 2.7, you need to explicitly number the format fields:

"This is a string with the value of {0} shown.".format(variable)

edited Jul 23 '14 at 16:09

answered Jul 23 '14 at 16:03

@C.B.: 2.7 and up, actually. – Martijn Pieters Jul 23 '14 at 16:04
@MartjinPieters really? I tried that on 2.7 and it threw errors at me. Maybe it was 2.6 – C.B. Jul 23 '14 at 16:04

score 3 · Accepted Answer · answered Jul 23 '14 at 16:04

3

You have a lot of options.

"This is a string with the value of " + str(variable) + " shown."

"This is a string with the value of %s shown." % (str(variable))

"This is a string with the value of {0} shown.".format(variable)

answered Jul 23 '14 at 16:04

TheSoundDefense

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score 1 · Answer 3 · answered Jul 23 '14 at 16:05

1

this is one of the way we can also do

from string import Template
s = Template('$who likes $what')
s.substitute(who='tim', what='kung pao')

answered Jul 23 '14 at 16:05

sundar nataraj

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Also good, though possibly overkill for his particular example. – TheSoundDefense Jul 23 '14 at 16:06
3

@TheSoundDefense i thought same answer as you but your quick.do it first or do it different :) – sundar nataraj Jul 23 '14 at 16:06

Output variable value in a string

3 Answers3