将 dict 直接转储到文件

Question

Is it possible to do something like this with the json module?

>>> import json
>>> d={1:2}
>>> json.dump(d, 'file.json')

Or, do I need to use json.dumps and then file.write ? That is:

>>> open('file.json', 'w').write(json.dumps(d))

Answer 1

Try this way:

import json
with open('file.json', 'w') as f:
    json.dump(d, f)

Explanation:

In the second line, file.json gets created and opened as the variable f.

In the third line, your dictionary d gets written into the file.json