import cgi import io def handler(event, context): print(event) print(event['body']) fp = io.BytesIO(event['body'].encode('utf-8')) pdict = cgi.parse_header(event['headers']['Content-Type'])[1] if 'boundary' in pdict: pdict['boundary'] = pdict['boundary'].encode('utf-8') pdict['CONTENT-LENGTH'] = len(event['body']) form_data = cgi.parse_multipart(fp, pdict) print('form_data=', form_data)