python菱形

u=int(input("请输入行数"))
for i in range(1,u+1):
    print(" ")
    for j in range(i,u):
        print(" ",end="")
    for k in range(u-i+1,u):
        print("*",end="")
    for m in range(u-i,u):
        print("*",end="")
for f in range(u+1,2*u+1):
    print(" ")
    for z in range(u+1,f):
        print(" ",end="")
    for p in range(f-1,2*u):
        print("*",end="")
    for c in range(f,2*u):
        print("*",end="")