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Convert a List of Lists to a List of Tuples

April 30, 2023 / List, Python / By

This tutorial will discuss about unique ways to convert a list of lists to a list of tuples.

Suppose we have a list of lists. Like this,

listOfLists = [['John', 34],
                ['Mark', 23],
                ['Suse', 37],
                ['Avni', 29],
                ['John', 100],
                ['John', 102]]

We want to convert this list of lists into a list of tuples, like this,

[('John', 34),
 ('Mark', 23),
 ('Suse', 37),
 ('Avni', 29),
 ('John', 100),
 ('John', 102)]

For that, we will use the map() function.

Call map() method, and pass following arguments in it,

  • tuple() method. It accepts a sequence as an argument and returns a tuple with the same elements as in the sequence.
  • List of lists.

The map() function will apply the the tuple() method on each list in the tuple. Which will convert each list into a tuple. Then it will store all the converted tuples into a mapped object. Then we can create a list of tuples from the tuples in the mapped object using the list() function.

This way we can convert a list of lists into a list of tuples.

Frequently Asked:

Let’s see the complete example,

# List of Lists
listOfLists = [['John', 34],
                ['Mark', 23],
                ['Suse', 37],
                ['Avni', 29],
                ['John', 100],
                ['John', 102]]

# Convert list of lists to list of tuples
# using map() function
listOfTuples = list(map(tuple, listOfLists))

print(listOfTuples)

Output

[('John', 34), ('Mark', 23), ('Suse', 37), ('Avni', 29), ('John', 100), ('John', 102)]

Summary

We learned how to convert a list of lists to a list of tuples in Python.

Python List Methods

List MethodDescription
append(x)Add an item to the end of the list.
extend(iterable)Extend the list by appending all the items from the iterable.
insert(i, x)Insert an item at a given position i.
remove(x)Remove the first item from the list whose value is x.
pop([i])Remove the item at the given position in the list and return it.
index(x[, start[, end]])Return the first index at which a value occurs.
count(x)Return the number of times x appears in the list.
sort([key[, reverse]])Sort the items of the list in place.
reverse()Reverse the elements of the list in place.
clear()Remove all items from the list.
copy()Return a shallow copy of the list.

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Python List Methods

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