python - single object

import json
with open('data.json', 'w') as outfile:
    json.dump(obj, outfile)

python - single object - str

import json
with open('metadata.json', 'w') as outfile:
    obj = json.dumps(metadata_dict, default=str)
    outfile.write(obj)

python - single object - timestamp

import json
import pandas as pd

def default(o):
    if isinstance(o, pd.Timestamp):
        return o.isoformat()

with open('metadata.json', 'w') as outfile:
    obj = json.dumps(metadata_dict, default=default)
    outfile.write(obj)

python - dataframe

scraped_dataframe.to_csv('dump.csv', sep=',', encoding='utf-8', index=False)

python - write list of objects to json file

import json

with open('databases.json', 'w') as outfile:
    json.dump(([database.dump() for database in databases]), outfile)