Python programming Codes-Part_1

# Print "Hello, world!" to the console print("Hello, world!") # Declare and assign a variable my_variable = 10 # Conditional statement if my_variable > 5: print("my_variable is greater than 5") else: print("my_variable is less than or equal to 5") # Loop through a list my_list = [1, 2, 3, 4, 5] for item in my_list: print(item) # Define a function def my_function(param1, param2): return param1 + param2 # Call a function result = my_function(2, 3) print(result) 

# Integer my_int = 10 # Float my_float = 3.14 # String my_string = "Hello, world!" # Boolean my_bool = True # List my_list = [1, 2, 3, 4, 5] # Tuple my_tuple = (1, 2, 3) # Set my_set = {1, 2, 3} # Dictionary my_dict = {"name": "John", "age": 30, "city": "New York"} 

# Open a file file = open("file.txt", "w") # Write to a file file.write("Hello, world!") # Close a file file.close() # Open a file for reading file = open("file.txt", "r") # Read from a file contents = file.read() # Close a file file.close() 

# Import a module import math # Use a function from a module result = math.sqrt(16) print(result) # Import a specific function from a module from random import randint # Use the imported function random_number = randint(1, 10) print(random_number) # Import a custom module import my_module # Use a function from the custom module result = my_module.my_function(2, 3) print(result) 

# Create a list my_list = [1, 2, 3, 4, 5] # Append to a list my_list.append(6) = ("new_element") # Remove from a list my_list.remove(3) # Get the length of a list length = len(my_list) # Sort a list my_list.sort() # Reverse a list my_list.reverse() # Sort a list in alphabetic reserve order my_list.sort(reverse="True") # Extend the list with another list my_list.extend(["element","element1"]) 

# Create a new list using list comprehension my_list = [1, 2, 3, 4, 5] new_list = [x * 2 for x in my_list] print(new_list) # Create a new list with condition using list comprehension my_list = [1, 2, 3, 4, 5] new_list = [x for x in my_list if x % 2 == 0] print(new_list) 

# Creating a tuple my_tuple = (1, 2, 3, 4, 5) # Creating a single-element tuple (note the comma) single_element_tuple = (42,) # Creating an empty tuple empty_tuple = () 

# Accessing elements by index first_element = my_tuple[0] last_element = my_tuple[-1] # Slicing a tuple subset_tuple = my_tuple[1:4] # Tuple unpacking a, b, c, d, e = my_tuple 

for item in my_tuple: print(item) # Using enumerate to access both index and value for index, value in enumerate(my_tuple): print(f"Index {index}: {value}") 

# Checking if an element exists in a tuple if 3 in my_tuple: print("3 is in the tuple") 

my_tuple[0] = 10 # Raises a TypeError: 'tuple' object does not support item assignment 

# Concatenating two tuples tuple1 = (1, 2, 3) tuple2 = (4, 5, 6) concatenated_tuple = tuple1 + tuple2 # Repeating a tuple repeated_tuple = (0,) * 3 # Creates (0, 0, 0) 

# Create a dictionary my_dict = {"name": "John", "age": 30, "city": "New York"} # Access a value in a dictionary name = my_dict["name"] # Add a new key-value pair to a dictionary my_dict["country"] = "USA" # Remove a key-value pair from a dictionary del my_dict["age"] # Check if a key exists in a dictionary if "name" in my_dict: print("Name exists in the dictionary") # Get the keys and values of a dictionary as lists keys = list(my_dict.keys()) values = list(my_dict.values()) 

# Define a class class Person: def __init__(self, name, age): self.name = name self.age = age def say_hello(self): print(f"Hello, my name is {self.name} and I am {self.age} years old.") # Create an object of a class person1 = Person("John", 30) # Call a method of an object person1.say_hello() 

# Creating a set my_set = {1, 2, 3} # Adding elements to a set my_set.add(4) # Removing an element from a set my_set.remove(2) # Checking if an element is in a set if 3 in my_set: print("3 is in the set") # Iterating through a set for item in my_set: print(item) # Set operations set1 = {1, 2, 3} set2 = {3, 4, 5} # Union of two sets union_set = set1.union(set2) # Intersection of two sets intersection_set = set1.intersection(set2) # Difference between two sets difference_set = set1.difference(set2) # Symmetric difference between two sets symmetric_difference_set = set1.symmetric_difference(set2)