9. Astrologer's Star.py 

# Pattern Printing
# input = Integer n
# Boolean = True or False

# True n=4
# *
# **
# ***
# ****

# n = no.of rows

# False n = 4
# ****
# ***
# **
# *


# print the stars according to the date of birth of the client



Raahu = input("Enter 'YES' if Raahu present else enter 'NO':   ").lower()

# str(Raahu)
# Raahu = False
if Raahu == "yes":
    # Take date input from the user
    date_of_birth = input("Enter the Date Of Birth (DD-MM-YYYY): ")

    # Extracting the date from the DOB
    dob = date_of_birth.split('-')

    # Custom exception class for invalid date format
    class InvalidDateFormatError(Exception):
        def __init__(self, message="Invalid date format. Please use DD-MM-YYYY."):
            self.message = message
            super().__init__(self.message)

    # Raise an error if date is not in 3 part format i.e DD-MM-YYYY
    # if len(dob) != 3:
    #     print("Enter a valid (DD-MM-YYYY) date format!")

    # Storing the day in another variable to use it as no. of rows of the star pattern
    date = dob[0]
    # Typecasting of the day into int
    day = int(date)

    try:
        # Check the date is valid or not
        if day <= 31:
            # i to iterate throughout the rows
            for i in range(1, day + 1):
                # j to iterate throughout the columns
                for j in range(1, i + 1):
                    print("*", end=" ")
                print()
        else:
            print("Invalid date entered!")

    except InvalidDateFormatError as e:
        print(f"Error: {e}", "Invalid date format. Please enter the date in DD-MM-YYYY format.")


elif Raahu == "no":

    # Take date input from the user
    date_of_birth = input("Enter the Date Of Birth (DD-MM-YYYY): ")
    # Extracting the date from the DOB
    dob = date_of_birth.split('-')


    # Custom exception class for invalid date format
    class InvalidDateFormatError(Exception):
        def __init__(self, message="Invalid date format. Please use DD-MM-YYYY."):
            self.message = message
            super().__init__(self.message)

    # Raise an error if date is not in 3 part format i.e DD-MM-YYYY
    # if len(dob) != 3:
    #     print("Enter a valid (DD-MM-YYYY) date format!")
    # Storing the day in another variable to use it as no. of rows of the star pattern
    date = dob[0]
    # Typecasting of the day into int
    day = int(date)

    try:
        # Check the date is valid or not
        if day <= 31:
            # i to iterate throughout the rows
            for i in range(day, -1, -1):
                # j to iterate throughout the columns
                for j in range(1, i + 1):
                    print("*", end=" ")
                print()
        else:
            print("Invalid date entered!")



    except InvalidDateFormatError as e:
        print(f"Error: {e}", "Invalid date format. Please enter the date in DD-MM-YYYY format.")


else:

print("Wrong Choice Entered!!! ") 

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