Python Data Types (List, Tuple, Set and Dictionary) and Methods

7 min readJun 23, 2022

1. List

List is collection of same or different data that are enclosed by [], separated by comma(,). List is Data Structure in Python.

Creating a Python List

For creating a list you need bunch of values that should be enclosed in Square bracket [] and separated by comma

alpha = [‘a’,’b’,’c’,’d’,’e’]
num = [1,2,3,4,5]
mixed = [1 ,’naren’,3.3]
list_in=[0,[1.1,1.2],2,[3.3,3.4]]

Accessing List

Accessing a list mean how you gonna to use or access a set of value that may be all list or individual element in list.

print(alpha)
print(num)
print(mixed)
print(list_in)
print(type(alpha))#accessing particular element
print(alpha[2])
print(alpha[:])
print(alpha[1:4])
print(alpha[:3])
print(alpha[2:])

List Methods

Adding in List

You can add an element on list using append, extend and (‘+’)methods

alpha+=[‘f’,’g’]
print(alpha)num+=[6,7]
print(num)alpha.append(‘h’)
num.append(8)alpha.extend([‘i’])
num.extend([9])print(alpha)
print(num)

Altering in List

Altering a particular element or set of element in List.

list_in[0]=’a’
print(list_in)list_in[4:] = [0.415,3.1415926]
print(list_in)list_in[3:4] = [[3.5,3.6],2.7182818]
print(list_in)
# Or you could completely re-alter all values

Counting values in List

This method help how much element present on particular List.

print(“How much a is present “,alpha.count(‘a’))
print(“How much z is present “,alpha.count(‘z’))

Copying in List

You can copy all element of list to another variable name.

letters = alpha.copy()
print(“Copying Values”,letters)

Indexing in List

To find on which place that element is presented in List.

print(“In which element a is present “,alpha.index(‘a’))
print(“In which element d is present “,alpha.index(‘d’))

Inserting in List

To insert or change the element on list and you need to mention on which element to be placed.

alpha.insert(9,’j’)
print(“Newly inserted value is “,alpha)

Length of List

To find the length of List.

print(“Length of alpha is “,len(alpha))

Remove elements in List

You can remove the element on list using remove and pop method.

Remove an element by directly mentioning value Pop will remove last element

alpha.remove(‘j’)
print(“J is removed “,alpha)#Last element remove
alpha.pop()
print(“Last element removed “,alpha)

Reverse elements in List

To reverse all element in List.

alpha.reverse()
print(“Reversed elements are “,alpha)
alpha.reverse()

Clear elements in List

To clear all element in List.

print(list_in)
list_in.clear()
print(list_in)

Sort in List

Sort all element in List.

unsorted = [“m”,”n”,”z”,”y”,”q”,”a”]
print(“Before sorting “,unsorted)
unsorted.sort()
print(“After sorting “,unsorted)

Concatenation two List

Adding of two Lists.

result=alpha+num
print("The concatenation of two list is ",result)

Looping in List

Looping all elements in List.

for value in alpha:
 print(value)

2. Tuple

Tuples are collection are same or same or different data that are enclosed in parenthesis ( ) separated by comma , Tuple is Data structure in Python

Creating Tuple

For creating a list you need set of values that should be enclosed in parenthesis () and separated by comma ,

alpha = (“a”,”b”,”c”,”d”)
num = (1,2,3,4,5)
#List in tuples
lint = [1,(2,3),4]

Accessing Tuples

Accessing a tuple mean how you gonna to use or access a set of value that may be all tuple elements or individual element on tuple but when you access particular element the result will be in List.

print(alpha)
print(num)
print(lint)
print(type(alpha))print(alpha[2:5])
print(alpha[3:])
print(alpha[:4])
print(alpha[:])
print(alpha[:-2])

Tuple Methods

Adding elements in Tuple

You can add tuple element using ‘+’ operator but basically tuple is unmutable which means once you set a value you cant alter back

alpha += (“e”,”f”)
print(alpha)

Counting in Tuple

This method help how much element present on particular Tuple.

print(alpha.count(‘a’))
print(alpha.count(‘z’))
print(num.count(5))

Copying in Tuple

This is not core method you can use variable to access that value.

#This is not core python tuple method
b = alpha
print(b)

Indexing in Tuple

To find on which place that element is presented in Tuple.

print(alpha.index(“c”))

Length in Tuple

To find the length of Tuple.

print(len(alpha))

Min and Max

To find minimum and maximum value on Tuple.

print("Maximum value in tuple is ",max(num))
print("Minimum value in tuple is ",min(num))

Sum in Tuple

To find sum value on Tuple.

print(sum(num))

Sort in Tuple

To sort all element in tuple you need to use another method to sort the tuple element.

abc = (“m”,”p”,”n”,”h”,”k”,”s”,”y”)
print(sorted(abc))

Looping in Tuple

Looping all elements in Tuple.

for value in alpha:
 print(value)

3. Sets

Set is collection of same different data that are enclosed in braces {} separated in comma , Set is Data structure in Python.

Creating Set

For creating a set you need bunch of values that should be enclosed in Braces {} and separated by comma ,

alpha = {‘a’,’b’,’c’,’d’,’e’,’f’,’g’,’h’}
number={1,2,3,4,5}
mixed = {5.4,”hello”,(3,2,1)}

Accessing a Set

Accessing a set mean how you gonna to use or access all element in set.

print(alpha)
print(number)
print(mixed)
print(type(alpha))

Set Methods

Add in Set

To add an element in set.

alpha.add(‘i’)
print(alpha)

Sorted in Set

To sort the set element because all element are unsorted and the result will be in tuple.

print(sorted(alpha))

Remove in Set

To remove an element in set you can use remove method or discard method.

alpha.remove(‘i’)
print(sorted(alpha))alpha.discard(‘h’)
print(sorted(alpha))

Update in Set

To update an element in set.

alpha.update([‘g’,’h’,’i’])
print(sorted(alpha))#no Duplication

min and max

To find minimum and maximum value in set.

print(min(alpha))
print(max(alpha))print(min(number))
print(max(number))

Pop in Set

To remove an last element in set but it may remove any element because it set are unsorted.

mixed.pop()
print(mixed)

Clear in Set

To clear all element in set.

print(“Before Clear “,mixed)
mixed.clear()
print(“After Clear “,mixed)

Looping in Set

To loop all element in set.

for value in alpha:
 print(value)

Creating some variable for math methods

set1={1,2,3,4,5}
set2={4,5,6,7,8}
set3={1,2,3}
set4={10,20,30}alpha1 = {‘a’,’b’,’c’,’d’,’e’}
alpha2 = {‘d’,’e’,’f’,’g’,’h’}
alpha3 = {‘a’,’b’,’c’}
alpha4 = {‘x’,’y’,’z’}

Union Set

To print all element on union elements.

result = set1.union(set2)
print(“Union Result is “,result)result1 = alpha1 | alpha2
print(“Union Result is “,sorted(result1))

Intersection Set

To print an element that present on both intersection elements.

result = set1.intersection(set2)
print(“Intersection Result is “,result)result1 = alpha1 & alpha2
print(“Intersection Result is “,sorted(result1))

Difference Set

To show what difference on comparing to another set elements.

result = set1.difference(set2)
print(“Differences Result is “,result)result1 = alpha1 — alpha2
print(“Differences Result is “,sorted(result1))result2 = set2.difference(set1)
print(“Another Differences side Result “,result2)result3 = alpha2 — alpha1
print(“Another Differences side Result “,sorted(result3))

Symmetric Difference Set

It will print unmatched element on both set.

result = set1.symmetric_difference(set2)
print(“First Sym-Differences Result “,result)result1 = alpha1 ^ alpha2
print(“Second Sym-Differences Result “,sorted(result1))

Subset

To find father element on set means all value of set 3 will be in some elements set 1. (Result on boolean)

result = set3.issubset(set1)
print(“Set 3 is child setl is parent “,result)result1 = set2.issubset(set1)
print(“Set 2 is child setl is parent “,result1)result2 = alpha3 <= alpha1
print(“alpha 3 is child alphal is parent “,result2)

Superset

To find children method.(Result on boolean)

result = set1.issuperset(set3)
print(“setl is parent Set 3 is child “,result)result1 = set2.issuperset(set1)
print(“Set 2 is child setl is parent “,result1)result2 = alpha1 >= alpha3
print(“alphal is parent alpha 3 is child “,result2)

Disjoint

To find that no difference element on both set.(Result on boolean)

result = set3.isdisjoint(set1)
print(“The is no matching values”,result)result1 = set4.isdisjoint(set1)
print(“The is no matching values”,result1)result2 = alpha3.isdisjoint(alpha1)
print(“The is no matching values”,result2)result3 = alpha4.isdisjoint(alpha1)
print(“The is no matching values”,result3)

4. Dictionary

Dictionary are enclosed in braces {} not as single element, present as key value pair {“key”:”value”} dictionary is data structure in python

Creating dictionary

For creating a dictionary you need bunch of values that should be enclosed in Braces {} and separated by comma , and it was represented by Key value pair {key:value}

num_alpha={1:’A’,2:’B’,3:’C’,4:’D’,5:’E’}

Accessing the dictionary

Accessing a dictionary mean how you gonna to use or access a set of key value pair that may be all element or individual element in dictionary.

print(num_alpha)
print(num_alpha[2])
print(num_alpha.keys())
print(num_alpha.values())
print(num_alpha.items())
print(type(num_alpha))

Dictionary Methods

Adding in dictionary

To add an element in dictionary you need to insert key and value to be placed on the particular key element.

num_alpha[6]=’G’
print(num_alpha)num_alpha[6]=’F’
print(num_alpha)

Copying in dictionary

To copy an element in dictionary.

dupli=num_alpha.copy()
print(“dupli result is”,dupli)

Removing in dictionary

To remove an element in dictionary directly del method, pop, popitem and clear methods

del dupli[6]
print(“dupli result is”,dupli)dupli.pop(4)
print(“dupli result is”,dupli)dupli.popitem()
print(“dupli result is”,dupli)dupli.clear()
print(“dupli result is”,dupli)

Update in dictionary

To update an element in dictionary you need insert both key and new value.

print(num_alpha)
num_alpha.update({6:”Z”})
print(num_alpha)

Length of dictionary

To find the length in dictionary.

print(“The length of dicionary is “,len(num_alpha))

Get dictionary

To get a value you ‘get’ method.

one=num_alpha.get(1)
print(one)

Set default in Dictionary

One thing while using set default you can insert new value on ‘setdefault’ method but if the key element already have a value the value cant be changed.

res1=num_alpha.setdefault(3)
print(res1)res2=num_alpha.setdefault(5,’y’)
print(res2)res3=num_alpha.setdefault(7,’Y’)
print(res3)print(num_alpha)

From key to iter value

You can use ‘fromkey’ method to combine both element to represent in dictionary element.

num={5,4,3,2,1}
val1=’Value’num1=dict.fromkeys(num,val1)
print(num1)

Looping in dict

To loop an particular element or all dictionary elements.

for key,value in num_alpha.items():
 print(key,’ has value of ‘,value)for val in num_alpha.keys():
 print(val)for a in num_alpha.values():
 print(a)

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