pattern.py

n = int(input("Enter number of lines in which we need to print first pattern : "))
# flag = n-1;
for i in range(0, n):
    t=n-i;
    while(t>0):
        print(" ", end="")
        t-=1
    u=2*(i+1)-1;
    while(u>0):
        print("*", end="")
        u-=1
    print()

print()
n = int(input("Enter number of lines in which we need to print second pattern : "))
for i in range(1,n+1):
    t=1
    while(t<=i):
        print("*", end="")
        t+=1
    print()

n = int(input("Enter number of lines in which we need to print third pattern, the number should be odd : "))

for i in range(1,n+1):
    t=1
    if(i==(n+1)/2):
        # print("L", end="")
        while(t<=n):
            if(t==(n+1)/2):
                print(" ", end="")
            else:
                print("*", end="")
            t+=1    
    else:
        while(t<=n):
            print("*", end="")
            t+=1
    print()