File "C:\Users\Administrator\Desktop\樱花树.py", line 5 def tree(n, 1); ^ SyntaxError: invalid syntax [Finished in 229ms]

There is a syntax error in the code. The semi-colon after "1" in the function declaration should be a colon. The corrected code should be:

def tree(n, i):
    if n > 0:
        tree(n-1, i+1)
        print(" "*(i-1) + "*"*(n*2-1))