How inset a string in list item in Python

Question

I have list:

['Happy Family','2122540624','213 E Broadway # A, New York, NY 10002, United States']

I want to add a ',' into first item like this:

 ['Happy Family,','2122540624','213 E Broadway # A, New York, NY 10002, United States']

Any friend know how to do it?

Please be aware [so] is not a code-writing service. We can help solve specific, technical problems, not open-ended requests for code or advice. Please [edit] your question to show what you have tried so far, and what specific problem you need help with. See the [ask] page for details how to best help us help you. — MisterMiyagi, Aug 17 '20 at 19:32

score 3 · Accepted Answer · edited Aug 17 '20 at 19:30

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MyList = ['Happy Family','2122540624','213 E Broadway # A, New York, NY 10002, United States']
MyList[0] = MyList[0] +','

Result:

['Happy Family,', '2122540624', '213 E Broadway # A, New York, NY 10002, United States']

You can try it

edited Aug 17 '20 at 19:30

dawg

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answered Aug 17 '20 at 19:28

Alejandro Novella

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Brad Figueroa · Answer 2 · 2020-08-17T19:28:13.600

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You just need to get the item by index and add a comma as below:

a = ['Happy Family','2122540624','213 E Broadway # A, New York, NY 10002, United States']
a[0] = f'{a[0]},' # f-string above python 3.6 otherwise a[0] = a[0] + ','
print(a) # Outputs ['Happy Family,', '2122540624', '213 E Broadway # A, New York, NY 10002, United States']

edited Aug 17 '20 at 19:28

answered Aug 17 '20 at 19:23

Brad Figueroa

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Or just `a[0]=a[0]+','` – dawg Aug 17 '20 at 19:25
Yep, but `f-string` is the pythonic way I guess – Brad Figueroa Aug 17 '20 at 19:26
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*Yep, but f-string is the pythonic way I guess* -- for versions that support f strings. It has only been supported since v 3.6 – dawg Aug 17 '20 at 19:27
I thought the tag said `3.7`. Anyway, I added your suggestion – Brad Figueroa Aug 17 '20 at 19:28
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I really don't see how an f-string is Pythonic here. "add a comma to the first element" is *literally* ``a[0] += ','``. There is no need to roll out format syntax here, which at worst even obscures what happens when using realistic variable names. – MisterMiyagi Aug 17 '20 at 19:34

How inset a string in list item in Python

2 Answers2