Json dumping a dict throws TypeError: keys must be a string

Question

I am attempting to convert the following dict into JSON using json.dumps:

 {
     \'post_engaged\': 36,
     \'post_impressions\':          


        

Answer 1

Modifying the accepted answer above, I wrote a function to handle dictionaries of arbitrary depth:

def stringify_keys(d):
    """Convert a dict's keys to strings if they are not."""
    for key in d.keys():

        # check inner dict
        if isinstance(d[key], dict):
            value = stringify_keys(d[key])
        else:
            value = d[key]

        # convert nonstring to string if needed
        if not isinstance(key, str):
            try:
                d[str(key)] = value
            except Exception:
                try:
                    d[repr(key)] = value
                except Exception:
                    raise

            # delete old key
            del d[key]
    return d