Full Error - StackOverflow Question

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TypeError                                 Traceback (most recent call last)
<ipython-input-19-139ad3629b25> in <module>
    121
    122         with open(all_matches_index, "w") as file_handle:
--> 123             json.dump(file_handle, {"matches": matches})
    124
    125 file_handle.close

/usr/lib/python3.8/json/__init__.py in dump(obj, fp, skipkeys, ensure_ascii, check_circular, allow_nan, cls, indent, separators, default, sort_keys, **kw)
    177     # could accelerate with writelines in some versions of Python, at
    178     # a debuggability cost
--> 179     for chunk in iterable:
    180         fp.write(chunk)
    181

/usr/lib/python3.8/json/encoder.py in _iterencode(o, _current_indent_level)
    436                     raise ValueError("Circular reference detected")
    437                 markers[markerid] = o
--> 438             o = _default(o)
    439             yield from _iterencode(o, _current_indent_level)
    440             if markers is not None:

/usr/lib/python3.8/json/encoder.py in default(self, o)
    177
    178         """
--> 179         raise TypeError(f'Object of type {o.__class__.__name__} '
    180                         f'is not JSON serializable')
    181

TypeError: Object of type TextIOWrapper is not JSON serializable