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Add query_dataframe function to be able to then use the labels in pandas #8

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Add query_dataframe function to be able to then use the labels in pandas #8

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23 changes: 23 additions & 0 deletions prometheus_pandas/query.py
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,29 @@ def query(self, query: str, time: Optional[Timestamp] = None, timeout: Optional[

return to_pandas(self._do_query('api/v1/query', params))

def query_dataframe(self, query: str, time: Optional[Timestamp] = None, timeout: Optional[Duration] = None) -> Matrix:
"""
Evaluates an instant query at a single point in time like query(),
but always returns a Dataframe with the value in column "value" and
prometheus labels used as additional columns.

:param query: Prometheus expression query string.
:param time: Evaluation timestamp. Optional.
:param timeout: Evaluation timeout. Optional.
:return: Pandas DataFrame.
"""
params = {'query': query}

if time is not None:
params['time'] = _timestamp(time)

if timeout is not None:
params['timeout'] = _duration(timeout)


data = self._do_query('api/v1/query', params)
return pd.DataFrame(r['metric'] | {'value': np.float64(r['value'][1])} for r in data['result'])

def query_range(self, query: str, start: Timestamp, end: Timestamp, step: Union[Duration, float], timeout: Optional[Duration] = None) -> Matrix:
"""
Evaluates an expression query over a range of time.
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