Convert between a list and a tuple in Python
In Python, you can convert between a list and a tuple using the list() and tuple() functions. These functions generate new list or tuple objects when given an iterable object, such as a list, tuple, set, range, etc.
Although the term "convert" is used, note that these functions actually create new objects, leaving the original objects unaffected.
In the following sample code, list, tuple, and range objects are used as examples.
l = [0, 1, 2]
print(l)
print(type(l))
# [0, 1, 2]
# <class 'list'>
t = ('one', 'two', 'three')
print(t)
print(type(t))
# ('one', 'two', 'three')
# <class 'tuple'>
r = range(10)
print(r)
print(type(r))
# range(0, 10)
# <class 'range'>
For further details on range(), see the following article.
Convert a tuple to a list with list()
By passing an iterable object, such as a tuple, to list(), you can generate a new list that contains the elements of the passed iterable.
tl = list(t)
print(tl)
print(type(tl))
# ['one', 'two', 'three']
# <class 'list'>
rl = list(r)
print(rl)
print(type(rl))
# [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
# <class 'list'>
Convert a list to a tuple with tuple()
Similarly, by passing an iterable object, such as a list, to tuple(), you can generate a new tuple that contains the elements of the passed iterable.
lt = tuple(l)
print(lt)
print(type(lt))
# (0, 1, 2)
# <class 'tuple'>
rt = tuple(r)
print(rt)
print(type(rt))
# (0, 1, 2, 3, 4, 5, 6, 7, 8, 9)
# <class 'tuple'>
Add, change, and delete elements of a tuple
Since a tuple is immutable, you cannot add, change, or remove its elements directly. However, you can convert a tuple to a list using list(), modify the list as needed, and then use tuple() to create an updated tuple.
For more details on manipulating tuples, see the following article.