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[Tut] Python Join List with Underscore [The Most Pythonic Way]

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Python Join List with Underscore [The Most Pythonic Way]

The '_'.join(list) method on the underscore string '_' glues together all strings in the list using the underscore string as a delimiter—and returns a new string. For example, the expression '_'.join(['a', 'b', 'c']) returns the new string 'a_b_c'.

Definition and Usage


The string.join(iterable) method joins the string elements in the iterable to a new string by using the string on which it is called as a delimiter.

Here’s a short example:

friends = ['Alice', 'Bob', 'Carl'] # Empty delimiter string ''
print(''.join(friends))
# AliceBobCarl # Delimiter string '_'
print('_'.join(friends))
# Alice_Bob_Carl

The string elements in the list friends are concatenated using the delimiter string '' in the first example and the underscore character '_' in the second example.

Related articles:

Syntax

You can call this method on each list object in Python. Here’s the syntax:

string.join(iterable)


Argument Description
iterable The elements to be concatenated.

Code Puzzle


To practice what you’ve learned so far, feel free to solve the following interactive code puzzle:

Exercise: Guess the output and check if you were right by running the interactive code shell.

Where to Go From Here?


Enough theory, let’s get some practice!

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https://www.sickgaming.net/blog/2020/06/...honic-way/
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