Which of the following functions converts a list into a string?

4 Ways to Convert List to String Python: Join, Traversal & More

By SimplilearnLast updated on Dec 8, 202114383266

Python is one of the most popular programming languages today, and in this tutorial we will learn various nuances of Python, including what is a list in python, what is a string, ways to change a list to a string and more. Let’s start.

Table of Contents Show

4 Ways to Convert List to String Python: Join, Traversal & More
Table of Contents
What Is a List in Python?
Homogenous Lists:
Heterogeneous Lists:
Accessing an Item From the List
Various methods to convert lists to string in python?
Conversion of List of characters to a string
Python program to convert a list to string
Python | Program to convert String to a List
4 Ways to Convert List to String in Python

What Is a List in Python?

A list in python is an ordered sequence that can hold a variety of object types, such as, integer, character or float. A list in python is equivalent to an array in other programming languages. It is represented using square brackets, and a comma(,) is used to separate two objects present in the list.

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A list and an array in other programming languages differ in the way that an array only stores a similar data type, meaning that an array is homogeneous in nature, but a list in python can store different data types at a time, and therefore it can either be homogeneous or heterogeneous. Below are some examples of homogeneous and heterogeneous lists in python:

Homogenous Lists:

Heterogeneous Lists:

Accessing an Item From the List

An item from the list can be accessed by referring to its index in the list. The indexing of elements in the list starts from 0. Let’s take an example of the list we created in the last step.

To access an element from the list, we pass the index of that element in the print function.

As mentioned earlier, that indexing starts from 0, so when index [1] is passed, it gives the result as “dog”. Similarly, if we pass the index, say [2], it will give the output 2.2

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Various methods to convert lists to string in python?

In this short tutorial, we look at all the different methods and the code that can be used to convert list to string in Python.

Conversion of List of characters to a string

Even a set of characters in the form of a list can be converted to a string in the same manner as above. Here is an example to demonstrate the conversion of a list of characters to a string.

Example:

inp_str = ['J', 'o', 'u', 'r', 'n', 'a', 'l', 'd', 'e', 'v'] st = "" for x in inp_str: st += x print(st)

Output:

Journaldev

Conclusion

Thus, in this article, we have studied the different techniques and methods of conversion of Python List to String.

References

StackOverflow – Conversion of List to a String in Python

Python program to convert a list to string

Given a list, write a Python program to convert the given list to string.

There are various situation we might encounter when a list is given and we convert it to string. For example, conversion to string from the list of string or the list of integer.

Example:

Input: ['Geeks', 'for', 'Geeks'] Output: Geeks for Geeks Input: ['I', 'want', 4, 'apples', 'and', 18, 'bananas'] Output: I want 4 apples and 18 bananas

Let’s see various ways we can convert the list to string.

Method #1:
Iterate through the list and keep adding the element for every index in some empty string.

# Python program to convert a list to string 

# Function to convert 

def listToString(s):

# initialize an empty string

str1 = ""

# traverse in the string

for ele in s:

str1 += ele

# return string

return str1

# Driver code 

s = ['Geeks', 'for', 'Geeks']

print(listToString(s))

Output: GeeksforGeeks

Method #2: Using .join() method

# Python program to convert a list 
# to string using join() function 

# Function to convert 

def listToString(s):

# initialize an empty string

str1 = " "

# return string

return (str1.join(s))

# Driver code 

s = ['Geeks', 'for', 'Geeks']

print(listToString(s))

Output: Geeks for Geeks

But what if the list contains both string and integer as its element. In those cases, above code won’t work. We need to convert it to string while adding to string.

Method #3: Using list comprehension

# Python program to convert a list 
# to string using list comprehension 

s = ['I', 'want', 4, 'apples', 'and', 18, 'bananas']

# using list comprehension 

listToStr = ' '.join([str(elem) for elem in s])

print(listToStr)

Output: I want 4 apples and 18 bananas

Method #4: Using map()
Use map() method for mapping str (for converting elements in list to string) with given iterator, the list.

# Python program to convert a list 
# to string using list comprehension 

s = ['I', 'want', 4, 'apples', 'and', 18, 'bananas']

# using list comprehension 

listToStr = ' '.join(map(str, s))

print(listToStr)

Output: I want 4 apples and 18 bananas

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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 users choice, are encountered. To do this we use the split() method.
Syntax:

string.split("delimiter")

Examples:

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

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 1:

# 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 2:

# 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 3:

# 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']

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4 Ways to Convert List to String in Python

While working with python data types, there are situations when you want to convert the data collected from one type to another. There are 4 methods by which we can convert a list to a string in python with fewer lines of code. These methods of converting a list into a string include iteration, comprehension, join(), and map() method. But before understanding all these conversion methods in detail, let us understand what are lists and strings.