Error gettting values when number is between quotes (string)

[viper0131]

Hi,

I'm trying to parse a json object that contains:
"NumberOfUsers":"30"

The number is between quotes. I can't change it, it an off the shelf app that generates this json.

In example.yaml I have the following metrics definition:

- name: NumberOfUsers
  description: Number of users
  path: $.NumberOfUsers

When I curl the endpoint it throws the following error:

2018-01-21 15:58:35,551 - root - DEBUG - metric_name: test_NumberOfUsers, value for '$.NumberOfUsers'
2018-01-21 15:58:35,551 - root - DEBUG - metric_name: test_NumberOfUsers, value for '$.NumberOfUsers' : 30
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/SocketServer.py", line 596, in process_request_thread
    self.finish_request(request, client_address)
  File "/usr/local/lib/python2.7/SocketServer.py", line 331, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "/usr/local/lib/python2.7/SocketServer.py", line 652, in __init__
    self.handle()
  File "/usr/local/lib/python2.7/BaseHTTPServer.py", line 340, in handle
    self.handle_one_request()
  File "/usr/local/lib/python2.7/BaseHTTPServer.py", line 328, in handle_one_request
    method()
  File "/usr/local/lib/python2.7/site-packages/prometheus_client/exposition.py", line 94, in do_GET
    output = generate_latest(registry)
  File "/usr/local/lib/python2.7/site-packages/prometheus_client/exposition.py", line 80, in generate_latest
    output.append('{0}{1} {2}\n'.format(name, labelstr, core._floatToGoString(value)))
  File "/usr/local/lib/python2.7/site-packages/prometheus_client/core.py", line 823, in _floatToGoString
    elif math.isnan(d):
TypeError: a float is required

[viper0131]

I quick workaround seems to work:

In app/exporter.py:

metric = GaugeMetricFamily(metric_name, metric_description, value=float(value))
works for now.

[bcg62]

I'm also hitting this issue

[kunchalavikram1427]

Hi, I also face this issue now