String interpolation working with python

Question

I am new to learning how to use string interpolation in strings and am having trouble getting this example I am working with to actual print the right results.

I've tried to do:

print "My name is {name} and my email is {email}".format(dict(name="Jeff", email="[email protected]"))

And it errors saying KeyError: 'name'

Then I tried using:

print "My name is {0} and my email is {0}".format(dict(name="Jeff", email="[email protected]"))

And it prints

My name is {'email': '[email protected]', 'name': 'Jeff'} and my email is {'email': '[email protected]', 'name': 'Jeff'}

So then I tried to do:

print "My name is {0} and my email is {1}".format(dict(name="Jeff", email="[email protected]"))

And it errors saying IndexError: tuple index out of range

It should give me the following output result back:

My name is Jeff and my email is [email protected]

Thanks.

user2555451 · Accepted Answer · 2013-12-17 03:02:01Z

8

Just remove the call to dict:

>>> print "My name is {name} and my email is {email}".format(name="Jeff", email="[email protected]")
My name is Jeff and my email is [email protected]
>>>

Here is a reference on the syntax for string formatting.

answered Dec 17, 2013 at 3:02

user2555451

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2 Comments

user3079411 Over a year ago

Thanks. So you don't have to use dict?

user2555451 Over a year ago

@user3079411 - No, not with str.format. If you have a dictionary though, you can index it like @hwnd demonstrated. But in your case, the call to dict is unnecessary.

hwnd · Accepted Answer · 2013-12-17 03:10:15Z

3

You're missing the [] (getitem) operator.

>>> print "My name is {0[name]} and my email is {0[email]}".format(dict(name="Jeff", email="[email protected]"))
My name is Jeff and my email is [email protected]

Or use it without calling dict

>>> print "My name is {name} and my email is {email}".format(name='Jeff', email='[email protected]')
My name is Jeff and my email is [email protected]

edited Dec 17, 2013 at 3:10

answered Dec 17, 2013 at 3:02

hwnd

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