我不知道这个错误意味着什么，也不知道如何解决这个问题。我想将国家键和法国值添加到字典中

Question

dictionary_of_spliting = {"Food":"Honey",
                          "Trash1":"some",
                          "Trash2":"some",
                          "Trash3":"your",
                          "Thing":"resorces"}

for keys in dictionary_of_spliting:
    if var <= 12:
        dictionary_of_spliting["Country"] = "France"

Traceback (most recent call last)
  File "C:\Users\IK\PycharmProjects\More sting methods.py", line 20, in <module>
   for keys in dictionary_of_spliting:
RuntimeError: dictionary changed size during iteration

Answer 1

你在迭代时修改了一个字典--这是不允许的，因为它会破坏底层的迭代器。

你可以替换

for keys in dictionary_of_splitting

使用

for keys in list(dictionary_of_splitting)

制作条目的副本并防止此问题。如果使用python2，也可以使用dictionary_of_splitting.keys()