Method # 1: Using a list of lists + slicing strings
A combination of list comprehension and slicing strings can be used to accomplish this particular task. It’s just a brute force method to accomplish this task.
| # Python3 code to demonstrate how it works
# Get all substrings of a string
# Using comprehension list + line slice
# initialization string test_str = "Geeks"
# print original string print ( "The original string is:" + str (test_str))
< code class = "comments"> # Get all substrings of a string
# Using comprehension list + line slice res = [test_str [i: j] for i in range ( len (test_str)) for j in range (i + 1 , len (test_str) + 1 )]
print ( "All substrings of string are:" + str (res)) |
Output:
The original string is: Geeks
All substrings of string are: [’G’, ’Ge’, ’Gee’, ’Geek’, ’Geeks’, ’e’, ’ee’, ’eek’, ’eeks’, ’e’, ’ek’, ’eks’, ’k’, ’ks’, ’s’]
Method # 2: Using itertools.combinations()
This particular task can also be done using the built-in combination function, which helps to get all possible combinations, i.e. substrings from a string.
| # Python3 code to demonstrate how it works
# Get all substrings of a string
# Using itertools.combination () from itertools import combinations
# initialization string test_str = "Geeks"
# print the original line print ( "The original string is:" + str (test_str))
# Get everything substrings of a string
# Using ite rtools.combination () res = [test_str [x: y] for x, y in combinations ( range ( len (test_str) + 1 ), r = 2 )]
# print result print ( "All substrings of string are:" + str (res) ) |
Output:
The original string is: Geeks
All substrings of string are: [’G’, ’ Ge ’,’ Gee ’,’ Geek ’,’ Geeks’, ’e’, ’ee’, ’eek’, ’eeks’,’ e ’,’ ek ’,’ eks’, ’k’, ’ks’ , ’s’]
Python | Get all substrings of a given string Python functions: Questions
Python | Get all substrings of a given string String Variables: Questions
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