Python - dump dict as a json string -

what missing? want dump dictionary json string.

i using python 2.7

with code:

import json fu = {'a':'b'} output = json.dump(fu) 

i following error:

traceback (most recent call last):   file "/usr/local/lib/python2.7/dist-packages/gevent-1.0b2-py2.7-linux-x86_64.egg/gevent/greenlet.py", line 328, in run     result = self._run(*self.args, **self.kwargs)   file "/home/ubuntu/workspace/bitmagister-api/mab.py", line 117, in mabloop     output = json.dump(fu) typeerror: dump() takes @ least 2 arguments (1 given) <greenlet @ 0x7f4f3d6eec30: mabloop> failed typeerror 

use json.dumps dump str

>>> import json >>> json.dumps({'a':'b'}) '{"a": "b"}' 

json.dump dumps file