﻿ Python: Select a string from a given list of strings with the most unique characters - w3resource

# Python: Select a string from a given list of strings with the most unique characters

## Python Programming Puzzles: Exercise-28 with Solution

Write a Python program to select a string from a given list of strings with the most unique characters.

```Input:
['cat', 'catatatatctsa', 'abcdefhijklmnop', '124259239185125', '', 'foo', 'unique']
Output:
abcdefhijklmnop

Input:
['Green', 'Red', 'Orange', 'Yellow', '', 'White']
Output:
Orange
```

Pictorial Presentation:

Sample Solution-1:

Python Code:

``````#License: https://bit.ly/3oLErEI
def test(strs):
return max(strs, key=lambda x: len(set(x)))
strs = ['cat', 'catatatatctsa', 'abcdefhijklmnop', '124259239185125', '', 'foo', 'unique']
print("Original list:")
print(strs)
print("Select a string from the said list of strings with the most unique characters:")
print(test(strs))
strs = ['Green', 'Red', 'Orange', 'Yellow', '', 'White']
print("\nOriginal list:")
print(strs)
print("Select a string from the said list of strings with the most unique characters:")
print(test(strs))
``````

Sample Output:

```Original list:
['cat', 'catatatatctsa', 'abcdefhijklmnop', '124259239185125', '', 'foo', 'unique']
Select a string from the said list of strings with the most unique characters:
abcdefhijklmnop

Original list:
['Green', 'Red', 'Orange', 'Yellow', '', 'White']
Select a string from the said list of strings with the most unique characters:
Orange
```

Flowchart:

Sample Solution-2:

Python Code:

``````#License: https://bit.ly/3oLErEI

def test(strs):
largest_set = {}
n = 0
largest = None
for phrase in strs:
diff = len(largest_set) - len(set(phrase))
if diff < 0:
largest_set = set(phrase)
largest = phrase
n = len(largest_set)
elif diff == 0:
if n < len(set(phrase)):
largest_set = set(phrase)
largest = phrase
n = len(largest_set)
else:
pass
return largest
strs = ['cat', 'catatatatctsa', 'abcdefhijklmnop', '124259239185125', '', 'foo', 'unique']
print("Original list:")
print(strs)
print("Select a string from the said list of strings with the most unique characters:")
print(test(strs))
strs = ['Green', 'Red', 'Orange', 'Yellow', '', 'White']
print("\nOriginal list:")
print(strs)
print("Select a string from the said list of strings with the most unique characters:")
print(test(strs))
``````

Sample Output:

```Original list:
['cat', 'catatatatctsa', 'abcdefhijklmnop', '124259239185125', '', 'foo', 'unique']
Select a string from the said list of strings with the most unique characters:
abcdefhijklmnop

Original list:
['Green', 'Red', 'Orange', 'Yellow', '', 'White']
Select a string from the said list of strings with the most unique characters:
Orange
```

Flowchart:

Python Code Editor :

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