Python – Split Strings on Prefix Occurrence

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.