christmas_pattern.py

#Python Program to print a simple christmas tree pattern using asterisk

def christmastree(level): #function definition
    ''' 
       Functions prints the pattern of christmas tree     
    params:
      level: inputs the height of the tree
    returns:
      None
      
    ''' 
    a=level-1
    b=1
    for image in range(0,level):
        for pixel in range(0,a):
            print(' ',end='')
        for image in range(0,b):
            print('*',end='')
        for pixel in range(0,a):
            print(' ',end='')
        b=b+2
        a=a-1
        print()
    for l in range(3):
      print(' '*(level-2),'*')
     


if __name__ == "__main__": #main function

  level= int(input("Enter the height of christmas tree (Integer less than 30):")) #inputs the height of the tree

  christmastree(level) #function calling
    
'''
Sample Output  :
Enter the height of christmas tree (Integer less than 30):10

         *         
        ***        
       *****       
      *******      
     *********     
    ***********    
   *************   
  ***************  
 ***************** 
*******************
         *
         *
         *
 
'''