Example 1: what is a tuple in python
# A tuple is a sequence of immutable Python objects. Tuples are
# sequences, just like lists. The differences between tuples
# and lists are, the tuples cannot be changed unlike lists and
# tuples use parentheses, whereas lists use square brackets.
tup1 = ('physics', 'chemistry', 1997, 2000);
tup2 = "a", "b", "c", "d";
# To access values in tuple, use the square brackets for
# slicing along with the index or indices to obtain value
# available at that index.
tup1[0] # Output: 'physics'
Example 2: tuples in python
t = 12345, 54321, 'hello!'
print(t[0])
# output 12345
print(t)
# output (12345, 54321, 'hello!')
# Tuples may be nested:
u = t, (1, 2, 3, 4, 5)
print(u)
# output ((12345, 54321, 'hello!'), (1, 2, 3, 4, 5))
# Tuples are immutable:
# assigning value of 12345 to 88888
t[0] = 88888
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'tuple' object does not support item assignment
# but they can contain mutable objects:
v = ([1, 2, 3], [3, 2, 1])
print(v)
# output ([1, 2, 3], [3, 2, 1])
Example 3: what are tuples in python
#A tuple is essentailly a list with limited uses. They are popular when making variables
#or containers that you don't want changed, or when making temporary variables.
#A tuple is defined with parentheses.
Example 4: tuple() python
example = [1, 2, 3, 4]
# Here is a list above! As we both know, lists can change in value
# unlike toples, which are not using [] but () instead and cannot
# change in value, because their values are static.
# list() converts your tuple into a list.
tupleexample = ('a', 'b', 'c')
print(list(tupleexample))
>> ['a', 'b', 'c']
# tuple() does the same thing, but converts your list into a tuple instead.
print(example)
>> [1, 2, 3, 4]
print(tuple(example))
>> (1, 2, 3, 4)
Example 5: python tuple methods
count(x) : Returns the number of times 'x' occurs in a tuple
index(x) : Searches the tuple for 'x' and returns the position of where it was first found