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# Python – All possible concatenations in String List

• Last Updated : 05 Aug, 2021

Sometimes, while working with String lists, we can have a problem in which we need to perform all possible concatenations of all the strings that occur in list. This kind of problem can occur in domains such as day-day programming and school programming.

Let’s discuss a way in which this task can be performed.

Input : test_list = [‘Gfg’, ‘Best’]
Output : [‘Gfg’, ‘Best’, ‘GfgBest’, ‘BestGfg’]

Input : test_list = [‘Gfg’]
Output : [‘Gfg’]

Method : Using permutations() + join() + loop
The combination of above functions can be used to solve this problem. In this, we perform the task of concatenation using join() and all possible combination extraction using permutations().

## Python3

 `# Python3 code to demonstrate working of``# All possible concatenations in String List``# Using permutations() + loop``from` `itertools ``import` `permutations` `# initializing list``test_list ``=` `[``'Gfg'``, ``'is'``, ``'Best'``]` `# printing original list``print``(``"The original list : "` `+` `str``(test_list))` `# All possible concatenations in String List``# Using permutations() + loop``temp ``=` `[]``for` `idx ``in` `range``(``1``, ``len``(test_list) ``+` `1``):``    ``temp.extend(``list``(permutations(test_list, idx)))``res ``=` `[]``for` `ele ``in` `temp:``    ``res.append("".join(ele))` `# printing result``print``(``"All String combinations : "` `+` `str``(res))`
Output
```The original list : ['Gfg', 'is', 'Best']
All String combinations : ['Gfg', 'is', 'Best', 'Gfgis', 'GfgBest', 'isGfg', 'isBest', 'BestGfg', 'Bestis', 'GfgisBest', 'GfgBestis', 'isGfgBest', 'isBestGfg', 'BestGfgis', 'BestisGfg']```

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