How to not return a key if its value is None in a recursive function-CodePudding

I have return statement within a recursive function that looks like this:

def recursive_function(data):
....
return {f'uid': uid,'title': title, 'string': string,'create-time': create_time, 'edit-time': edit_time, 'children': children, 'refs': refs}

Sometimes some of these values can be None (ex: when the title has a value, the string's value will be None, and vice-versa). The application I'm using does not recognize keys with None values, how do I prevent those keys from returning when the values are None?

Thank you in advance.

CodePudding user response：

You can't directly get non-None values from a dict directly. You can use a dictionary comprehension to retrieve the non-None values yourself instead.

def recursive_function(data):
...
    original_dict = {'uid': uid,'title': title, 'string': string,
                     'create-time': create_time, 'edit-time': edit_time,
                     'children': children, 'refs': refs}

    return { key: value for key, value in
             original_dict.items() if value is not None }

CodePudding user response：

You can achieve this using dictionary comprehension:

return {key:value for key,value in {f'uid': uid,'title': title, 'string': string,'create-time': create_time, 'edit-time': edit_time, 'children': children, 'refs': refs}.items() if value is not None }