Traceback (most recent call last):

 "minimal_demo.py", line 18, in <module>
main()

 "/home/bilderbuchi/Dropbox/Coding/Gooey/gooey/python_bindings/gooey_decorator.py", line 71, in inner2
return payload(*args, **kwargs)

 "minimal_demo.py", line 13, in main
args = parser.parse_args()

 "/home/bilderbuchi/Dropbox/Coding/Gooey/gooey/python_bindings/gooey_decorator.py", line 65, in run_gooey
f.write(json.dumps(build_spec, indent=2))

 "/home/bilderbuchi/anaconda3/envs/py2/lib/python2.7/json/__init__.py", line 250, in dumps
sort_keys=sort_keys, **kw).encode(obj)

 "/home/bilderbuchi/anaconda3/envs/py2/lib/python2.7/json/encoder.py", line 209, in encode
chunks = list(chunks)

 "/home/bilderbuchi/anaconda3/envs/py2/lib/python2.7/json/encoder.py", line 434, in _iterencode
for chunk in _iterencode_dict(o, _current_indent_level):

 "/home/bilderbuchi/anaconda3/envs/py2/lib/python2.7/json/encoder.py", line 408, in _iterencode_dict
for chunk in chunks:

 "/home/bilderbuchi/anaconda3/envs/py2/lib/python2.7/json/encoder.py", line 332, in _iterencode_list
for chunk in chunks:

 "/home/bilderbuchi/anaconda3/envs/py2/lib/python2.7/json/encoder.py", line 408, in _iterencode_dict
for chunk in chunks:

 "/home/bilderbuchi/anaconda3/envs/py2/lib/python2.7/json/encoder.py", line 408, in _iterencode_dict
for chunk in chunks:

 "/home/bilderbuchi/anaconda3/envs/py2/lib/python2.7/json/encoder.py", line 442, in _iterencode
o = _default(o)

 "/home/bilderbuchi/anaconda3/envs/py2/lib/python2.7/json/encoder.py", line 184, in default
raise TypeError(repr(o) + " is not JSON serializable")TypeError: <built-in function max> is not JSON serializable
Traceback (most recent call last):


 "test.py", line 22, in <module>

writer.save()


 "/usr/local/lib/python3.6/site-packages/pandas/io/excel.py", line 1732, in save

return self.book.close()


 "/usr/local/lib/python3.6/site-packages/xlsxwriter/workbook.py", line 311, in close

self._store_workbook()


 "/usr/local/lib/python3.6/site-packages/xlsxwriter/workbook.py", line 658, in _store_workbook

xlsx_file.write(os_filename, xml_filename)


 "/usr/local/lib/python3.6/zipfile.py", line 1594, in write

zinfo = ZipInfo.from_file(filename, arcname)


 "/usr/local/lib/python3.6/zipfile.py", line 496, in from_file

zinfo = cls(arcname, date_time)


 "/usr/local/lib/python3.6/zipfile.py", line 338, in __init__

raise ValueError('ZIP does not support timestamps before 1980')
ValueError: ZIP does not support timestamps before 1980
