How to solve dictionary changed size during iteration error?

Question

I want pop out all the large values and its keys in a dictionary, and keep the smallest. Here is the part of my program

for key,value in dictionary.items():
         


        

Answer 1

An alternative solution to dictionary changed size during iteration:

for key,value in list(dictionary.items()):
    for key1, value1 in list(dictionary.items()): 
            if key1!= key and value > value1:
                dictionary.pop(key)             
print (dictionary)  

Better use it with caution! when using this type of code, because list(dictionary.items()) calculated when the complier enters first time to loop. Therefore any change made on dictionary won't affect process inside the current loop.