File "C:\Users\Administrator\Desktop\樱花树.py", line 5 def tree(n, l); ^ SyntaxError: invalid syntax

There is a syntax error in the code. The semicolon after the parameter "l" in the function definition should be replaced with a colon.

Corrected code:

def tree(n, l):
    for i in range(1, n + 1):
        print(" " * (n - i) + "*" * (i * 2 - 1))
    for j in range(l):
        print(" " * (n - 1) + "| |")