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Python – Create a List of Tuples

  • Last Updated : 28 Jul, 2021

In this article, we will discuss multiple ways by which we can create a list of tuples in Python.

Method 1: Using list() and tuple() methods

we can create a list of tuples using list and tuples directly.

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Syntax:



[(tuple1),(tuple2),(tuple3),..,(tuple n)]

Example: Python code to create list of tuples using list and tuple

Python3




# create tuples with college id and
# name and store in a list
data = [(1, 'sravan'), (2, 'ojaswi'), (3, 'bobby'),
        (4, 'rohith'), (5, 'gnanesh')]
  
# display data
data

Output:

[(1, ‘sravan’), (2, ‘ojaswi’), (3, ‘bobby’), (4, ‘rohith’), (5, ‘gnanesh’)]

Method 2: Using zip() function

Using the zip() function we can create a list of tuples from n lists.

Syntax:

list(zip(list1,list2,.,listn)

Here, lists are the data (separate lists which are elements like tuples in the list



Example: Python program to create two lists  with college id and name  and create a list of tuples using zip() function

Python3




# create two lists  with college id and name
roll_no = [1, 2, 3, 4, 5]
name = ['sravan', 'ojaswi', 'bobby', 'rohith', 'gnanesh']
  
# zip the two lists using zip() function
data = list(zip(roll_no, name))
  
# display data
data

Output:

[(1, ‘sravan’), (2, ‘ojaswi’), (3, ‘bobby’), (4, ‘rohith’), (5, ‘gnanesh’)]

Method 3: Using zip() and iter() method

Here we are going to form a list of tuples using iter() function along with zip() function.

Syntax:

[x for x in zip(*[iter(list)])]

where x is the iterator to iterate in the list, zip is used to zip the list and iter() is used to iterate through the entire  list

Example: Python code to create a list of tuples by forming a list of tuples

Python3




# create a list with name
name = ['sravan', 'ojaswi', 'bobby', 'rohith', 'gnanesh']
  
# zip the two lists using iter() function
data = [x for x in zip(*[iter(name)])]
  
# display data
data

Output:

[(‘sravan’,), (‘ojaswi’,), (‘bobby’,), (‘rohith’,), (‘gnanesh’,)]



Method 4: using map() function

Here we are passing the data in list and then using the map() function we can create a list of tuples

Syntax:

list(map(tuple, list_data))

Here, list_data is the input list to create a list of tuples, list is a predefined function and tuple is a predefined function

Example: Python code to create a list of tuples from the list using map() function

Python3




# create a list with name
name = [['sravan'], ['ojaswi'], ['bobby'], 
        ['rohith'], ['gnanesh']]
  
# create list of tuple using above 
# list using map function
data = list(map(tuple, name))
  
# display data
data

Output:

[(‘sravan’,), (‘ojaswi’,), (‘bobby’,), (‘rohith’,), (‘gnanesh’,)]

Method 5: Using list comprehension and tuple() method

Here we are using comprehension and tuple to create a list of tuples.

Syntax:

[tuple(x) for x in list_data]

where tuple(x) is an iterator to convert iterative objects to tuple and list_data is the input data

Example: Python code to create a list of tuples using list comprehension and tuple() method

Python3




# create a list with name
name = [['sravan'], ['ojaswi'], ['bobby'],
        ['rohith'], ['gnanesh']]
  
# create list of tuple using above list
# using  list comprehension and tuple() 
# method
data = [tuple(x) for x in name]
  
# display data
data

Output:

[(‘sravan’,), (‘ojaswi’,), (‘bobby’,), (‘rohith’,), (‘gnanesh’,)]




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