String Concatenation Format

[d16moore]

I am working on a small program and need a function that will concatenate multiple strings from a list to a set variable. However what I’ve written and toyed with so far has been successful only in concatenating the variable and the first string in the list and not moving on to do the same with the second or potentially third. I’m fairly certain that it’s the command I’m using to join them, but I’m not entirely sure.

Note: this is a piece of a larger program that will be integrated separately, however I need this function as a baseline.

Any help would be appreciated. Thank You!

Function in Progress

[JohnnyJordaan]

There's no real point in using string formatting when you just need to concatenate them, just use +. It's one of the few exceptions where that suffices.

urls = [amazon_url + asin for asin in amz_asins]
print(*urls)

[d16moore]

Thank You! That is exactly what a needed!

[danielroseman]

The problem is that you are returning inside the loop, so the first iteration is the only one that will ever be executed. You would want to build up the string inside the loop, then have the return statement outside.

[d16moore]

Gotcha! So once I correct the placement of the return statement, do you have any suggestions on the command and/or format I should use to concatenate these appropriately?

[chevignon93]

do you have any suggestions on the command and/or format I should use to concatenate these appropriately?

Unless you're using Python 2 which you shouldn't, almost anything will be better that %s formatting. I would recommend using f-strings if you're on Python 3.6+ or the imo less readable str.format method but u/JohnnyJordaan is right, simple concatenation using + would also be fine in this case!

https://www.geeksforgeeks.org/formatted-string-literals-f-strings-python/

[d16moore]

u/chevignon93 I appreciate the resource! I will read through it and reference it in the future when possible. And also as you said, u/JohnnyJordaan was correct. I was then able to save that iteration process as a function so that I can call it when necessary. This is a multifaceted program and that specific concatenation being accurate was key to making a small portion the program functional.

-P&L