所以我需要从func2及其在func1中定义的数字增加1，并获得UnboundLocalError

因此，我需要从func2及其在func1中定义的数字增加1。继承人代码：

def func1():
    global number
    number = 0
    func2()
    print(number)

def func2():
    number += 1

func1()

当我运行它时，出现此异常：

Traceback (most recent call last):
  File "D:\global.py", line 10, in <module>
    func1()
  File "D:\global.py", line 4, in func1
    func2()
  File "D:\global.py", line 8, in func2
    number += 1
UnboundLocalError: local variable 'number' referenced before assignment