Python Create a List of Tuples
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
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# 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
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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
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# 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
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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
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# 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
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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
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# 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
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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
|
# 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
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Output:
[[sravan,], [ojaswi,], [bobby,], [rohith,], [gnanesh,]]