Python | Program to convert String to a List

In this program, we will try to convert a given string to a list, where spaces or any other special characters, according to the user’s choice, are encountered. To do this we use the split() method in string.

string.split("delimiter")

Examples:

Input : "Geeks for Geeks"
Output : ['Geeks', 'for', 'Geeks']

Input : "Geeks-for-Geeks"
Output : ['Geeks', 'for', 'Geeks']

Method#1: Using split() method

The split method is used to split the strings and store them in the list. The built-in method returns a list of the words in the string, using the “delimiter” as the delimiter string. If a delimiter is not specified or is None, a different splitting algorithm is applied: runs of consecutive whitespace are regarded as a single separator, and the result will contain no empty strings at the start or end if the string has leading or trailing whitespace.

Example 1A:

Python3

# Python code to convert string to list


def Convert(string):
    li = list(string.split(" "))
    return li


# Driver code
str1 = "Geeks for Geeks"
print(Convert(str1))

Output

['Geeks', 'for', 'Geeks']

Example 1B:

Python3

# Python code to convert string to list

def Convert(string):
    li = list(string.split("-"))
    return li


# Driver code
str1 = "Geeks-for-Geeks"
print(Convert(str1))

Output

['Geeks', 'for', 'Geeks']

Method#2: Using string slicing

Python3

# Python code to convert string to list character-wise

def Convert(string):
    list1 = []
    list1[:0] = string
    return list1


# Driver code
str1 = "ABCD"
print(Convert(str1))

Output

['A', 'B', 'C', 'D']

Method#3: Using re.findall() method 

This task can be performed using regular expression. We can use the pattern to match all the alphabet and make list with all the matched elements. 

Python3

# Python code to convert string to list character-wise
# Using re.findall method
import re

# Function which uses re.findall method to convert string to list character wise
def Convert(string):
    return re.findall('[a-zA-Z]', string)

# Driver code
str1="ABCD"
print("List of character is : ",Convert(str1))

Output

List of character is :  ['A', 'B', 'C', 'D']

Method #4: Using list comprehension 

Python3

s="Geeks"
x=[i for i in s]
print(x)

Output

['G', 'e', 'e', 'k', 's']

Method #5: Using enumerate function 

Python3

s="geeks"
x=[i for a,i in enumerate(s) ]
print(x)

Output

['g', 'e', 'e', 'k', 's']

Method #6: Using JSON

Python3

import json

stringA = '["geeks", 2,"for", 4, "geeks",3]'

# Type check

res = json.loads(stringA)
# Result
print("The converted list : \n",res)

Output

The converted list : 
 ['geeks', 2, 'for', 4, 'geeks', 3]

Method #7: Using ast.literal

Python3

import ast

# initializing string representation of a list
ini_list = '["geeks", 2,"for", 4, "geeks",3]'


# Converting string to list
res = ast.literal_eval(ini_list)

# printing final result and its type
print(res)
print(type(res))

Output

['geeks', 2, 'for', 4, 'geeks', 3]
<class 'list'>

Method #8: Using lambda function

Python3

s="Geeks"
x=list(filter(lambda i:(i in s),s))
print(x)

Output

['G', 'e', 'e', 'k', 's']

Method #9: Using map() 

Python3

s="Geeks"
x=list(map(str,s))
print(x)

Output

['G', 'e', 'e', 'k', 's']

Method#10: Using list()

Python3

s = "Geeks"
x = list(s)
print(x)

Output:

['G', 'e', 'e', 'k', 's']