How to delete dictionary key-value pairs if a substring is found at the end of more than one key?-CodePudding

Suppose I have the following dictionary:

dictionary = {
'thegreenmile': '1999',
'scarface': '1983',
'fightclub': '1999',
'thebluemile': '1776',
'theyellowmile': '1893'
}

I want Python to look through the dictionary. If there are keys that end in identical ways, remove the key-value pairs. In the dictionary above, that means while the key-value pair associated with the key thegreenmile remains, the other two key-value pairs associated with the keys thebluemile and theyellowmile are deleted.

You might ask, "What about the beginning? I see the word the duplicated." I'm only focusing on the end, and I haven't been successful in finding something that would allow me to target only the end (I do know about .strip(), but that's very different.)

How can I make it so that Python keeps only one key-value pair if it happens that multiple keys share the same ending? I'm thinking of a threshold of four identical characters at the end.

CodePudding user response：

You might try it this way, if you want to keep multiple values with the same suffix, try saving them in the same list, or in a format like json

dictionary = {'thegreenmile': '1999', 'scarface': '1983', 'fightclub': '1999', 'thebluemile': '1776', 'theyellowmile': '1893'}

keys, new_dic = set(), {}
for k, v in dictionary.items():
    if k[-4:] not in keys:
        keys.add(k[-4:])
        new_dic[k] = v
print(new_dic)