Question

我收到：

UnboundLocalError: local variable 'ImgY' referenced before assignment

当我做这样的事情时：

q = 0
def a():
  print(q)
while True:
  com = input("")
  if com == "":
    a()
  else:
    q = com

片断“ a（）”：

def df():
  global deas
  if vs != 1:
    if deas == 0:
      deas = 1
      for a in range(ImgY):
        for s in range(ImgX):
          corrente[num[a] + num[s]] = " "
  else:
    if imp == 1:
      ImgX = q[0:1]
      ImgY = q[2:3]
      for a in range(int(ImgY)):
          for s in range(int(ImgX)):
            corrente[num[a] + num[s]] = q[s+5]
    else:
      if deas == 0:
        deas = 1
        for a in range(ImgY):
          for s in range(ImgX):
            corrente[num[a] + num[s]] = " "

我不明白为什么，因为ImgY是全局变量，并且在下面的行（全局）中用“ ImgY = 30”定义其余here

Answer 1

代码段内

def df():
  global deas
  if vs != 1:
    if deas == 0:
      deas = 1
      for a in range(ImgY):
        for s in range(ImgX):
          corrente[num[a] + num[s]] = " "

ImgY / ImgX似乎没有分配。因此，如果它们是全局变量，请尝试：

def df():
  global deas,ImgY,ImgX
  if vs != 1:
    if deas == 0:
      deas = 1
      for a in range(ImgY):
        for s in range(ImgX):
          corrente[num[a] + num[s]] = " "

UnboundLocalError：分配全局之前引用的局部变量

1 个答案: