Question

字典[ “西北”] =（南+ width_NS，西）

TypeError：'type'对象不支持项目分配

class Building:
    def __init__(self, south, west, width_WE, width_NS, height=10):

      keys=("north-west","north-east","south-west","south-east")
      dict.fromkeys(keys)
      dict['north-west']=(south+width_NS,west)
      dict["north-east"]=(south+width_NS,west+width_WE)
      dict["south-west"]=(south,west)
      dict["south-east"]=(south,west+width_WE)
  self.corners=dict

Answer 1

您必须分配创建的词典：

d = dict.fromkeys(keys)

这给出了：

>>> d = dict.fromkeys(keys)
>>> d
{'south-west': None, 'south-east': None, 'north-east': None, 'north-west': None}
>>> d['north-west'] = (south+width_NS,west)
{'south-west': None, 'south-east': None, 'north-east': None, 'north-west': (6, 8)}

（我使用south，width_NS和west的一些随机值

Answer 2

使用另一个变量名称，例如dict1。这是正确的代码：

class Building:
    def __init__(self, south, west, width_WE, width_NS, height=10):
      keys=("north-west","north-east","south-west","south-east")
      dict1 = dict.fromkeys(keys)
      dict1['north-west']=(south+width_NS,west)
      dict1["north-east"]=(south+width_NS,west+width_WE)
      dict1["south-west"]=(south,west)
      dict1["south-east"]=(south,west+width_WE)
      self.corners=dict1

尝试将值分配给字典中的键会产生类型错误

2 个答案: