RuntimeError: dictionary changed size during iteration

dictionary changed size during iteration.md

错误

 for key in dict.keys():
     if not dict[key]:
         del dict[key]

调整

for key in dict.copy().keys():
    if not dict[key]:
        del dict[key]

问题可能出在 字典在循环迭代中变更大小，因为字典是无序的。

• The Python "RuntimeError: dictionary changed size during iteration" occurs when we change the size of a dictionary when iterating over it.
• To solve the error, use the copy() method to create a shallow copy of the dictionary that you can iterate over, e.g., my_dict.copy().