Python Practice Problems

Python practice problems help beginners to become experts in a python programming language with a small amount of practice effort.

8. Problem to find the difference of two sets

by

In this Python set program, we will find the difference of two sets with the help of the below-given steps.

What is set?
Sets are used to store multiple items in a single variable.
The set is one of 4 built-in data types in Python used to store collections of data.
It is an unordered collection data type that is iterable, mutable and has no duplicate elements.

Difference of two sets: The difference between sets A and B is the set of all elements of A that are not elements of B.

Difference of two sets:

Steps to solve the program

1. Create two sets using {}.
2. Add some elements in the sets.
3. Get the difference of two using the difference() function.
4. Print the output.

				
					a = {1,2,4,5}
b = {7,8,9,1}
print("Original set1: ",a)
print("Original set2: ",b)
print("Difference of a and b:",a-b)

Output :

				
					Original set1:  {1, 2, 4, 5}
Original set2:  {8, 9, 1, 7}
Difference of a and b:  {2, 4, 5}

Python program to find the symmetric difference of two sets.

Python program to show if one set is a subset of another set.

Python program to check if two sets are disjoint.

Python program to convert a list to a set.

Python program to convert a set to a list.

Python program to find the maximum element in a set.

 

 

 

Previous

find the intersection of two sets.

Next

find the symmetric difference of two sets.

7. Problem to find the intersection of two sets

by

In this Python set program, we will find the intersection of two sets using Python with the help of the below-given steps.

What is set?
Sets are used to store multiple items in a single variable.
The set is one of 4 built-in data types in Python used to store collections of data.
It is an unordered collection data type that is iterable, mutable and has no duplicate elements.

Intersection of two sets: The intersection is common elements between the two sets.

Intersection of two sets:

Steps to solve the program

1. Create two sets using {}.
2. Add some elements in the sets.
3. Get the intersection of sets using the intersection() function.
4. Print the output.

				
					a = {1,2,4,5}
b = {7,8,9,1}
print("Original set1: ",a)
print("Original set2: ",b)
print("Intersection of a and b: ",a.intersection(b))

Output :

				
					Original set1:  {1, 2, 4, 5}
Original set2:  {8, 9, 1, 7}
Intersection of a and b:  {1}

Python program to find the difference of two sets.

Python program to find the symmetric difference of two sets.

Python program to show if one set is a subset of another set.

Python program to check if two sets are disjoint.

Python program to convert a list to a set.

Python program to convert a set to a list.

 

 

 

Previous

find the union of two sets.

Next

find the difference of two sets.

6. Problem to find the union of two sets

by

In this Python set program, we will find the union of two sets using Python with the help of the below-given steps.

What is set?
Sets are used to store multiple items in a single variable.
The set is one of 4 built-in data types in Python used to store collections of data.
It is an unordered collection data type that is iterable, mutable and has no duplicate elements.

Union of two sets: Union is the combination of all the elements from both sets.

Union of two sets:

Steps to solve the program

1. Create two sets using {}.
2. Add some elements in the sets.
3. Get the union of two sets using union() function.
4. Print the output.

				
					a = {1,2,4,5}
b = {7,8,9,1}
print("Original set1: ",a)
print("Original set2: ",b)
print("Union of a and b: ",a.union(b))

Output :

				
					Original set1:  {1, 2, 4, 5}
Original set2:  {8, 9, 1, 7}
Union of a and b:  {1, 2, 4, 5, 7, 8, 9}

Python program to find the intersection of two sets.

Python program to find the difference of two sets.

Python program to find the symmetric difference of two sets.

Python program to show if one set is a subset of another set.

Python program to check if two sets are disjoint.

Python program to convert a list to a set.

 

 

 

Previous

check if an element is present in a set.

Next

Find the intersection of two sets.

5. Problem to check if an element is in a set

by

In this python set program, we will check if an element is in a set and if yes then we will print True, else print False with the help of the below-given steps.

What is set?
Sets are used to store multiple items in a single variable.
The set is one of 4 built-in data types in Python used to store collections of data.
It is an unordered collection data type that is iterable, mutable and has no duplicate elements.

Check if an element is in a set:

Steps to solve the program

1. Create a set using {}.
2. Add some elements in the set.
3. Use an if-else statement to check whether 5 is in the set or not.
4. Print the respective output.

				
					a = {1,2,3,5,6}
print("Original set: ",a)
if 5 in a:
    print("True")
else:
    print("False")

Output :

				
					Original set:  {1, 2, 3, 5, 6}
True

Python program to find the union of two sets.

Python program to find the intersection of two sets.

Python program to find the difference of two sets.

Python program to find the symmetric difference of two sets.

Python program to show if one set is a subset of another set.

Python program to check if two sets are disjoint.

 

 

 

Previous

Find the length of a set.

Next

find the union of two sets.

4. Problem to find the length of a set

by

In the Python set program, we will find the length of a set and print it to see the total number of elements in that set with the help of the below-given steps.

What is set?
Sets are used to store multiple items in a single variable.
The set is one of 4 built-in data types in Python used to store collections of data.
It is an unordered collection data type that is iterable, mutable and has no duplicate elements.

Length of a set:

Steps to solve the program

1. Create a set using {}.
2. Add some elements to the set.
3. Find the length of set using the len() function.
4. Print the output.

				
					a = {1,2,3,5,6}
print("Original set: ",a)
print("Length of given set: ",len(a))

Output :

				
					Original set:  {1, 2, 3, 5, 6}
Length of given set:  5

Python program to check if an element is present in a set.

Python program to find the union of two sets.

Python program to find the intersection of two sets.

Python program to find the difference of two sets.

Python program to find the symmetric difference of two sets.

Python program to show if one set is a subset of another set.

 

 

 

Previous

remove an element from a set.

Next

check if an element is present in a set.

3. Problem to remove an element from set

by

In this Python set program, we will remove an element from set and print the set to see the result with the help of the below-given steps.

What is set?
Sets are used to store multiple items in a single variable.
The set is one of 4 built-in data types in Python used to store collections of data.
It is an unordered collection data type that is iterable, mutable and has no duplicate elements.

Remove an element from set:

Steps to solve the program

1. Create a set using {}.
2. Add some elements in the set.
3. Remove an element from the set using remove() function.
4. Print the output.

				
					a = {1,2,3,5,6}
print("Original set: ",a)
a.remove(5)
print("New set: ",a)

Output :

				
					Original set:  {1, 2, 3, 5, 6}
New set:  {1, 2, 3, 6}

Python program to find the length of a set.

Python program to check if an element is present in a set.

Python program to find the union of two sets.

Python program to find the intersection of two sets.

Python program to find the difference of two sets.

Python program to find the symmetric difference of two sets.

 

 

 

Previous

add an element to a set.

Next

find the length of a set.

2. Problem to add elements to set in python

by

In this Python set program, we will add elements to set in Python and print the set to see the result with the help of the below-given steps.

What is set?
Sets are used to store multiple items in a single variable.
The set is one of 4 built-in data types in Python used to store collections of data.
It is an unordered collection data type that is iterable, mutable and has no duplicate elements.

Add elements to set:

Steps to solve the program
  1. Create a set using {}.
  2. Add some elements in the set.
  3. Add an element in the set using add() function.
  4. Print the output.
				
					a = {1,2,3,5,6}
print("Original set: ",a)
a.add(7)
print("New set: ",a)

Output :

				
					Original set:  {1, 2, 3, 5, 6}
New set:  {1, 2, 3, 5, 6, 7}

Python program to remove an element from a set.

Python program to find the length of a set.

Python program to check if an element is present in a set.

Python program to find the union of two sets.

Python program to find the intersection of two sets.

Python program to find the difference of two sets.

 

 

 

Previous

create a set with some elements.

Next

remove an element from a set.

1. Problem to create a set in Python

by

In this Python set program, we will create a set in Python and add some elements in it as an example with the help of the below-given steps.

What is set?
Sets are used to store multiple items in a single variable.
The set is one of 4 built-in data types in Python used to store collections of data.
It is an unordered collection data type that is iterable, mutable, and has no duplicate elements.

Create a set in Python: 

Steps to solve the program
  1. Create a set using {}.
  2. Add some elements to the set.
  3. Print the set.
				
					a = {1,2,3,5,6}
print("Set: ",a)

Output :

				
					Set:  {1, 2, 3, 5, 6}

Python program to add an element to a set.

Python program to remove an element from a set.

Python program to find the length of a set.

Python program to check if an element is present in a set.

Python program to find the union of two sets.

Python program to find the intersection of two sets.

 

 

 

Next

add an element to a set.

Python Set Programs, Exercises

by

Python set programs and exercises help beginners to get expertise in set data type, set is a collection of unique data enclosed with ‘{}’ curly braces. User can store only immutable data type to the set. e.g (int, float, string, tuple), mutable data type is not allowed as set element. e.g.  (list, dictionary, set), Let’s consider if we want to store student data, with unique id, then we can use set data type to store the data.

1). Python program to create a set with some elements.

Solution

2). Python program to add an element to a set.

Solution

3). Python program to remove an element from a set.

Solution

4). Python program to find the length of a set.

Solution

5). Python program to check if an element is present in a set.

Solution

6). Python program to find the union of two sets.

Solution

7). Python program to find the intersection of two sets.

Solution

8). Python program to find the difference of two sets.

Solution

9). Python program to find the symmetric difference of two sets.

Solution

10). Python program to show if one set is a subset of another set.

Solution

11). Python program to check if two sets are disjoint.

Solution

12). Python program to convert a list to a set.

Solution

13). Python program to convert a set to a list.

Solution

14). Python program to find the maximum element in a set.

Solution

15). Python program to find the minimum element in a set.

Solution

16). Python program to find the sum of elements in a set.

Solution

17). Python program to find the average of elements in a set.

Solution

18). Python program to check if all elements in a set are even.

Solution

19). Python program to check if all elements in a set are odd.

Solution

20). Python program to check if all elements in a set are prime.

Solution

21). Python program to check if a set is a proper subset of another set.

Solution

22). Python program to find the cartesian product of two sets.

Solution

23). Python program to find the power set of a set.

24). Python program to remove all elements from a set.

Solution

25). Python program to remove a random element from a set.

Solution

26). Python program to find the difference between two sets using the “-” operator.

Solution

27). Python program to find the intersection between two sets using the “&” operator.

Solution

28). Python program to find the union of multiple sets using the | operator.

Solution

29). Python program to find the symmetric difference of two sets using the “^” operator

Solution

30). Python program to check if a set is a superset of another set.

Solution

31). Python program to find the common elements between two sets.

Solution

32). Python program to remove a specific element from a set.

Solution

33). Python program to add multiple elements to a set.

Solution

34). Python program to remove multiple elements from a set.

Solution

35). Python program to check if a set is empty.

Solution

36). Python program to check if two sets are equal.

Solution

37). Python program to check if a set is a frozen set.

Solution

38). Python program to create a frozen set.

Solution

39). Python program to find the difference between multiple sets.

Solution

40). Python program to find the intersection between multiple sets.

Solution

41). Python program to check if any element in a set is a substring of a given string.

Solution

42). Python program to check if any element in a set is a prefix of a given string.

43). Python program to check if any element in a set is a suffix of a given string.

44). Python program to find the index of an element in a set.

Solution

45). Python program to convert a set to a dictionary with each element as key and value to an empty set.

Solution

46). Python program to create a set of even numbers from 1 to 20.

Solution

47). Python program to create a set of odd numbers from 1 to 20.

Solution

48). Python program to create a set of your favorite actors.

Solution

49). Python program to create a set of your favorite movies.

Solution

50). Python program to create two sets of books and find the intersection of sets.

Solution

51). Python program to find the longest word in a set.

Solution

Sort Lines of File with Python

by

Sort lines of file with Python is an easy way to arrange the file content in ascending order. In this article, we will focus to sort lines of file with the length of each line and sorting the lines in Alphabetical order.

Sort lines of file with line length size:

Let’s consider a text with the name sortcontent.txt which
contains some lines that we will try to sort on the basis of length of the each line.
				
					# sortcontent.txt
This is Python
Hello Good Morning How Are You.
This is Java
Python is good language
Steps to solve the program
  1. Open the first file using open(“sortcontent.txt”,”r”).
  2. Read all the lines of the file using readlines() method
  3. Now compare all lines one by one and exchange place
    of long length lines with small length lines to re-arrange them
    in ascending order using a nested loop.
  4. re-write all the lines of the list in ascending order.
				
					# Open file in read mode with context manager
with open("sortcontent.txt", "r") as file:
    # Read list of lines.
    FileLines = file.readlines()
    # Initial for loop to start picking each line one by one
    for i in range(len(FileLines)):
        # Initial for loop to compare all remaining line with previous one.
        for j in range(i+1, len(FileLines)):
            # compare each line length, swap small len line with long len line.
            if len(FileLines[i]) > len(FileLines[j]):
                temp = FileLines[i]
                FileLines[i] = FileLines[j]
                FileLines[j] = temp
            else:
                continue

# re-write all the line one by one to the file
with open('ReadContent.txt', "w") as file:
    # Combine all the sequentially arrange lines with join method.
    all_lines = ''.join(FileLines)
    # overwrite all the existing lines with new one
    file.write(all_lines)

Output: Open the sortcontent.txt file to see the output. below content will be available in the file. All lines of the file will arrange in ascending as per their length.

				
					This is Java
This is Python
Python is good language
Hello Good Morning How Are You.


Sort lines of file in Alphabetical order:

Let’s consider a text file with a city name list, where names are mentioned one name in each line In the below program will sort the line of the file in alphabetical order, reads all the names from a file, and print them in alphabetical order.

				
					# cityname.txt
Kolkata
Mumbai
Pune
Bangalore
Delhi
				
			
				
					# open file with context manager
with open('cityname.txt') as file:
    # read all lines with readlines() method.
    file_lines = file.readlines()
    # sort line of file in alphabetical order
    file_lines.sort()
    # print all sorted name using loop
    for line in file_lines:
        print(line)

When we will run above program, will get following output.

				
					Bangalore
Delhi
Kolkata
Mumbai
Pune

Related Articles

Python file program to count the number of lines in a file.
Python file program to get all odd and even length words in two lists.
Python file program to get all mobile numbers from a file.
Python file program to compare two files.
Python file program to count the number of lines in a file.

Previous

display words from a file that has less than 5 characters.