How To Convert String To List In Python?

If you’re working with Python, you’ll probably come across the need to convert a string to a list at some point. Luckily, Python makes this easy with its built-in list() function. In this article, we’ll show you how to convert a string to a list in Python.

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Introduction

Python has a built-in function called type which can be used to check the type of any variable.

If we want to convert a string to a list, we can use the list() function. The list() function takes a single argument, which can be either a string or another list.

If the argument is a string, the function will split the string into individual characters and return them as a list.

If the argument is another list, the function will return a shallow copy of that list.

Converting a String to a List in Python Using split()
The easiest way to convert a string to a list is by using the split() method. The split() method splits a string into multiple substrings and returns them as elements of an array.

We can specify the delimiter (or separator) as an optional argument. By default, the split() method splits on whitespace characters (spaces, tabs, newlines). If we want to split on something else, we need to specify it as an argument:

What is a String?

In Python, a string is a sequence of characters. It is a derived data type. Strings are immutable. This means that once defined, they cannot be changed. All of the characters in a string are stored in memory as a contiguous set of bytes. Each byte represents a character according to some encoding scheme.

There are many ways to convert a string into a list of characters in Python. One way is to use the list() function. This function takes a single argument which is the string to be converted into a list. The list of characters is returned as a new list object.

Another way to convert a string into a list is to use the split() method. This method splits a string into multiple substrings based on a separator character (or characters). The separator character can be any character or combination of characters such as whitespace, comma, or period. The split() method returns a new list object containing the substrings.

If you want to convert a string into a list of characters without using any built-in functions, you can do so by iterating over the string and appending each character to a new list.

What is a List?

A List is a collection which is ordered and changeable. In Python lists are written with square brackets.

Why Would You Want to Convert a String to a List?

There are a few reasons you might want to convert a string to a list. Maybe you have a bunch of text that you want to split up into individual words, or maybe you want to extract all the numbers from a string.

Python makes it easy to Convert String To List. You can do this in two ways:
– Using the split() method
– Using the list() method

The split() method is the most common way to Convert String To List. It splits a string into multiple substrings based on a delimiter (such as a space, comma, or semi-colon). For example, if you have the following string:

‘1,2,3,4,5’

and you want to convert it to a list of integers, you can use the split() method like this:

>>> my_list = ‘1,2,3,4,5’.split(‘,’) # Split on commas
>>> my_list # Prints [‘1’, ‘2’, ‘3’, ‘4’, ‘5’] # Note that each item is still a string!

As you can see from the output above, each item in the resulting list is still a string. If you want to convert each item in the list to an integer, you can use the map() function like this:
>>> my_list = list(map(int,’1,2,3′.split(‘,’))) >>> my_list [1 , 2 , 3]

Now each item in the list is an integer.

How to Convert a String to a List in Python

Strings are immutable data types in Python. This means that once a string is created, it cannot be changed. However, there are some ways to convert a string into a list.

One way to do this is with the split() method. This method splits a string into a list using a specified separator. For example, the following code splits a string into a list using the comma as a separator:

>>> my_string = “this is, a test”
>>> my_list = my_string.split(“,”)
>>> print(my_list)
[‘this is’, ‘a test’]

If you don’t specify a separator, the split() method will use whitespace as the default separator:

>>> my_string = “this is a test”
>>> my_list = my_string.split() # no separator specified, so whitespace will be used as the default separator
>>> print(my_list) # prints [‘this’, ‘is’, ‘a’, ‘test’]

Another way to convert a string to a list is with the list() method. The list() method takes a single argument, which must be an iterable data type (such as a string). The following code shows how to use the list() method to convert a string into a list:

>>> my_string = “this is a test”
>>> my_list = list(my_string) # iterates through each character in my_string and adds it to my_list
>>> print(my_list) # prints [‘t’, ‘h’, ‘i’, ‘s’, ‘ ‘, ‘i’, ‘s’, ‘ ‘, ‘a’, ‘ ‘, ‘t’, ‘e’, ‘s’,’t’]

Using the split() Method

Python split() method is used to split the string into substrings. The string splits at the specified separator and returns a list of substrings. The separators can be characters or regular expressions.

If no separator is passed, whitespace will be used as the default separator. For example −

>>> “hello world”.split()
[‘hello’, ‘world’]
We can also pass a Separator to the split() method. The string splits at the specified Separator and returns a list of substrings. Consider the following example −

>>> “hello-world-to-all”.split(‘-‘)
[‘hello’, ‘world’, ‘to’, ‘all’]

Using list()

Strings can be converted to lists using the built-in list() function. This function takes a single argument, which must be a string, and returns a list of the individual characters in the string.

For example:

>>> list(‘hello’)
[‘h’, ‘e’, ‘l’, ‘l’, ‘o’]

Using map()

If you want to convert a string into a list in Python, there are a few ways you can do it. One way is by using the built-in function map().

The map() function takes two arguments: a function and an ” iterable”. The function is called with each element of the iterable, and the return value is added to a new list.

For example, let’s say we have a string of numbers, and we want to convert it into a list of integers. We can do this by defining a function that takes a string and returns an int, and then passing that function to map().

Using a For Loop

One simple and direct way to convert a string into a list is by using the for loop. The process is pretty simple. All you have to do is to just iterate over the string and append it to a list. Here is an example:

“`
String = “23 4 567”
List = []
for i in String:
List.append(int(i))
print (List)
“`

Conclusion

In this article, we have seen how to convert a string into a list in Python. We have also seen various ways to do this. Some of the ways are using the split() method, using list() method, using eval() method, and using ast.literal_eval() method. All these methods are different and serve different purposes.So, choose the method according to your requirement.

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