Program to Convert String to a List

Introduction

Python is a strong, flexible, high-level, well-liked, and all-purpose programming language. It makes for a fantastic first language because it is clear and straightforward to read, with the ability to perform any task. 

It makes use of garbage collection and has dynamic typing. Code readability is prioritized in its design philosophy, which makes heavy use of indentation. It supports a number of programming paradigms, such as functional, object-oriented, and structured programming; hence, Web applications may be developed on a server using Python.

If you're into data research, machine learning, or web development, Python is your language.

In this article, we will discuss some programs to convert String to a List. So, Let's get started!

What Exactly are Lists?

A group of arranged items is referred to as a list. Strings, integers, and other types of data types, as well as other lists, can all be included in lists. The list is indexed, with 0 being the initial index, and each entry is given an index according to a specific order.

Because lists may be altered even after they are created, they are considered changeable objects. The entries on lists may be identical.

list =["Dhiraj",17,["Students","in","class"]]

What does "Strings" mean?

A string is a group of characters that are arranged in sequential order. Python comes with a class called "str" specifically designed to handle strings. They can be enclosed in a single, double, or triple inverted comma. 

fname='''Mira '''
lname='Khewal'

String to List Conversion in Python

It is relatively common in Python to convert data types for any reason it might be. Python does not make it easy to convert string to list in Python, though.

To create lists from strings, use the list function (). This technique, however, would return a list of characters since Python would not be able to tell where each item begins and finishes. As a result, Python has a few different techniques that may be used to change a string into a list per our needs.

Method 1: split()

A string can be divided using the split method according to a delimiter that has been given in converting string to list in Python. After splitting, it returns the separated string as a list.

The strings are divided into smaller chunks and put into the list using the split function. The built-in method uses the "delimiter" as the delimiter string and provides a list of the words that make up the string. A separate splitting mechanism is used if a delimiter is not supplied or is None. 

Runs of consecutive whitespace are treated as a single separator, and the output will not include any empty strings at the start or end of the string comprising the leading or the following whitespace.

string = "Coding is fun"
list = string.split()
print(list)

Or

def Convert(string):
    list = list(string.split(" "))
    return list
string = "Coding is fun"
print(Convert(string))

Output: 

The string is divided on the space if the delimiter is given in place of the space between them.

string = "Coding|is|fun"
list = string.split("|")
print(list_1)

Output: 

['Coding', 'is', 'fun']

The method is the same as the previous program; the only distinction is that whenever a separator appears, one element from the list is taken.

Each word in a string is assigned to a different member of the list using the split() function, which returns a list. When separating a string according to a delimiter, the split() function comes in handy so that the string is separated and kept in a list. With the aid of a designated delimiter, the built-in method of Python is used to return a list of the words included in the string.

Method 2: Slicing

Using the slice syntax, you may return a selection of characters and convert the string to a list in Python. For a portion of the text to be returned as a list, specify the start index and the end index, each separated by a colon.

def Convert(string):
    list = [ ]
    list[:0] = string
    return list[5:12]
string = "Coding is fun"
print(Convert(string))

Output: 

Method 3: map() 

The map function requires two parameters, the first of which is the datatype you must supply for str in converting into a string, and the second is the list's name. Now, the map function first calls each element in an iterable sequence using the str() method, which turns each element into a string. The join function then creates a single string out of all the elements.

a="Coding is fun"
b=list(map(str,a))
print(b)

Output:

The functionality of the list has been mapped to each element of the string using the map() method in converting string to list in Python.

Method 4: Enumerate Function 

A built-in function called enumerate() produces an enumerate object in converting a string to a list in Python. You may iterate through a list and obtain the element's index.

a = "Coding is fun"
x = enumerate(a)
print(list(x))

Output:

[(0, 'C'), (1, 'o'), (2, 'd'), (3, 'i'), (4, 'n'), (5, 'g'), (6, ' '), (7, 'i'), (8, 's'), (9, ' '), (10, 'f'), (11, 'u'), (12, 'n')]

a="Coding isfun"
x=[i for a,i in enumerate(a)]
print(x)

Output:

Method 5: list()

One of the most popular methods in converting string to list in Python is the list(). Using this technique, a string is turned into a list of characters. Use this technique only when you are convinced that each character in the list belongs there and the string comprises a group of letters or integers that are not separated by spaces. Without such, spaces would likewise be regarded as characters and kept in a list.

a = "Coding is fun"
x = list(a)
print(x)

Output:

Method 6: JSON

Working with JSON data is made possible via the Python language's built-in module JSON. The json.loads() function allows you to parse a JSON string if you have one.

import json
a = '["Coding", "is", "fun"]'
res = json.loads(a)
print(res)

Output:

Method 7: Using strip()

Whenever you need to divide a string into a list of characters while you are converting a string to a list in Python, use this technique. Character division occurs in the list method for the string. A list variable holds the characters that make up the string in this instance. White space is regarded in the string as a single character, as is evident. To create a list where each character in the string corresponds to each entry in the list, we utilize the strip() function.

s = "Coding is fun"  
print(list(s.strip()))

Output:

Method 8: lambda Function

An anonymous, short function is known as a lambda. There is only one expression allowed for a lambda function, regardless of the number of arguments it accepts in converting string to list.

a="Coding is fun"
res=list(filter(lambda i:(i in a),a))
print(res)

Output:

Method 9: Combination

For variety in converting string to list in Python, combine any of the approaches mentioned earlier.

s="Coding is fun"
s=s.split()
res=list(map(list,s))
print(res)

Output:

You can compile it with an online python compiler.

Check out Escape Sequence in Python

Frequently Asked Questions

What does a Python string mean?

A collection of letters, words, or other characters is called a string. It is one of the basic data structures that serve as the foundation for manipulating data. The str class is a built-in string class in Python. Because Python strings are "immutable," they cannot be modified after they have been formed.

How to convert string type list to list?

To convert a list of strings to a list of their corresponding values, you can use a loop. Create an empty list, then iterate through the string list, converting each string element to its desired data type. Append the converted values to the new list.

In Python, how do you make a list from a string?

Use the split() technique which is a built-in feature of strings. The strings are separated using the split technique, and they are then added to the list. It uses a delimiter to return a list of the words in the string.

How to convert a string to a list in Python without using split?

Without using split, you can convert a string to a list in Python by using the iteration method. You can iterate over each character in the string using a for loop and append it to an empty list. Then finally, return the resulting list.

Conclusion

The topic of this blog was converting strings to lists in Python using various techniques. Use the one that best fits your code, accomplishes your goal, and satisfies all of your requirements.

Recommended Readings:

• Python String Concatenation
• String slicing in Python
   

Recommended problems -

• Subsequence of a String
• Beautiful String
• Find the Shortest Substring in a String
   

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