Python – Split Strings on Prefix Occurrence

Python Server Side Programming Programming

When it is required to split the strings based on the occurrence of the prefix, two empty lists are defined, and a prefix value is defined. A simple iteration is used along with ‘append’ method.

Example

Below is a demonstration of the same −

from itertools import zip_longest

my_list = ["hi", 'hello', 'there',"python", "object", "oriented", "object", "cool", "language", 'py','extension', 'bjarne']

print("The list is : " )
print(my_list)

my_prefix = "python"
print("The prefix is :")
print(my_prefix)

my_result, my_temp_val = [], []

for x, y in zip_longest(my_list, my_list[1:]):
my_temp_val.append(x)
   if y and y.startswith(my_prefix):
      my_result.append(my_temp_val)
      my_temp_val = []

my_result.append(my_temp_val)

print("The resultant is : " )
print(my_result)

print("The list after sorting is : ")
my_result.sort()
print(my_result)

Output

The list is :
['hi', 'hello', 'there', 'python', 'object', 'oriented', 'object', 'cool', 'language', 'py', 'extension',
'bjarne']
The prefix is :
python
The resultant is :
[['hi', 'hello', 'there'], ['python', 'object', 'oriented', 'object', 'cool', 'language', 'py', 'extension',
'bjarne']]
The list after sorting is :
[['hi', 'hello', 'there'], ['python', 'object', 'oriented', 'object', 'cool', 'language', 'py', 'extension',
'bjarne']]

Explanation

The required packages are imported into the environment.
A list of strings is defined and is displayed on the console.
The prefix value is defined and is displayed on the console.
Two empty lists are defined.
The ‘zip_longest’ method is used to combine the list along with same list by omitting the first value in an iteration.
The elements are appended to one of the empty list.
This list is displayed as the output on the console.
This list is again sorted and displayed on the console.

AmitDiwan

Published on 13-Sep-2021 11:29:24

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