Split a List having Single Integer - Python

List With Single Item in Python

Last Updated : 06 Nov, 2024

Creating a list with single item is quite simple. Let's see different methods to create a single-item list and observe some common mistakes while creating this list.

Using Square Brackets

The most simple way to create a list with single element is by using [ ].

Python

# Creating a list with a single item
a = [5]
print(a)
print(type(a))

Output

[5]
<class 'list'>

Using List Constructor

We can also use list() constructor but remember, it requires an iterable as input (such as tuple, string, list).

Python

# Using list() to create a single-item list from a tuple
a = list((5,))
print(a)           
print(type(a))  

# Using list() to create a list from a single-character string
a = list("A")
print(a)         
print(type(a))     

# Below code would not work as we need an iterable
# a = list(5)
# a = list(True)

# note - int and bool object are not iterable

Output

[5]
<class 'list'>
['A']
<class 'list'>

Common Mistakes with Single-Item Lists

1. Using round brackets creates an integer, not a list.

Python

# Incorrect - This is an integer within parentheses, not a list
a = (5)
print(type(a))

Output

<class 'int'>

2. Using list constructor with non-iterable items (like int, bool) will throw TypeError.

Python

# Incorrect - We need to provide an iterator inside
# the list constructor
a = list(5)
print(type(a))

Output:

Hangup (SIGHUP)
Traceback (most recent call last):
  File "Solution.py", line 3, in <module>
    a = list(5)
TypeError: 'int' object is not iterable

Split a List having Single Integer - Python

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