[Bug 1403524] Re: [py3] getSourcePackage() crashes with ValueError: Expecting value: line 1 column 1 (char 0)

[Launchpad Bug Tracker]

** Branch linked: lp:debian/experimental/lazr.restfulclient

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https://bugs.launchpad.net/bugs/1403524

Title:
  [py3] getSourcePackage() crashes with ValueError: Expecting value:
  line 1 column 1 (char 0)

Status in lazr.restfulclient package in Ubuntu:
  Triaged

Bug description:
  With python3-launchpadlib, the getSourcePackage() API call fails:

  $ python3 ~/test.py 
  distro: https://api.staging.launchpad.net/1.0/ubuntu
  Traceback (most recent call last):
    File "/home/martin/test.py", line 8, in <module>
      pkg = ubuntu.getSourcePackage(name='coreutils')
    File "/usr/lib/python3/dist-packages/lazr/restfulclient/resource.py", line 621, in __call__
      return self._handle_200_response(url, response, content)
    File "/usr/lib/python3/dist-packages/lazr/restfulclient/resource.py", line 656, in _handle_200_response
      document = loads(text_type(content))
    File "/usr/lib/python3.4/json/__init__.py", line 318, in loads
      return _default_decoder.decode(s)
    File "/usr/lib/python3.4/json/decoder.py", line 343, in decode
      obj, end = self.raw_decode(s, idx=_w(s, 0).end())
    File "/usr/lib/python3.4/json/decoder.py", line 361, in raw_decode
      raise ValueError(errmsg("Expecting value", s, err.value)) from None
  ValueError: Expecting value: line 1 column 1 (char 0)

  With python-launchpadlib (py2) it works fine:

  $ python ~/test.py 
  ('distro:', <distribution at https://api.staging.launchpad.net/1.0/ubuntu>)
  ('pkg:', <distribution_source_package at https://api.staging.launchpad.net/1.0/ubuntu/+source/coreutils>)

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