[Bug 1815126] Re: [SRU] Bionic missing dependency for pydotplus

[Corey Bryant]

Verified successfully:

root at b1:~# sudo apt install --install-suggests python-networkx
...
root at b1:~# apt policy python-networkx
python-networkx:
  Installed: 1.11-1ubuntu3
  Candidate: 1.11-1ubuntu3
  Version table:
 *** 1.11-1ubuntu3 500
        500 http://archive.ubuntu.com/ubuntu bionic-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     1.11-1ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages
root at b1:~# apt policy python-pydotplus
python-pydotplus:
  Installed: 2.0.2-2
  Candidate: 2.0.2-2
  Version table:
 *** 2.0.2-2 500
        500 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status

root at b1:~# sudo apt install --install-suggests python3-networkx
...
root at b1:~# apt policy python3-networkx python3-pydotplus
python3-networkx:
  Installed: 1.11-1ubuntu3
  Candidate: 1.11-1ubuntu3
  Version table:
 *** 1.11-1ubuntu3 500
        500 http://archive.ubuntu.com/ubuntu bionic-proposed/universe amd64 Packages
        100 /var/lib/dpkg/status
     1.11-1ubuntu2 500
        500 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
python3-pydotplus:
  Installed: 2.0.2-2
  Candidate: 2.0.2-2
  Version table:
 *** 2.0.2-2 500
        500 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
        100 /var/lib/dpkg/status


** Tags removed: verification-needed verification-needed-bionic
** Tags added: verification-done verification-done-bionic

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https://bugs.launchpad.net/bugs/1815126

Title:
  [SRU] Bionic missing dependency for pydotplus

Status in python-networkx package in Ubuntu:
  Invalid
Status in python-networkx source package in Bionic:
  Fix Committed
Status in python-networkx source package in Cosmic:
  Invalid
Status in python-networkx source package in Disco:
  Invalid

Bug description:
  [Impact]
  python-networkx in bionic is missing a dependency on python(3)-pydotplus. The versions in cosmic and disco no longer use pydotplus. The fix would be to add python(3)-pydotplus to Suggests in bionic since it is not in main.

  [TestCase]
  root at b1:~# python
  Python 2.7.15rc1 (default, Nov 12 2018, 14:31:15)
  [GCC 7.3.0] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import networkx
  >>> from networkx.drawing.nx_pydot import write_dot
  >>> write_dot(networkx.Graph(), "/tmp/null")
  Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
    File "<decorator-gen-232>", line 2, in write_dot
    File "/usr/lib/python2.7/dist-packages/networkx/utils/decorators.py", line 220, in _open_file
      result = func(*new_args, **kwargs)
    File "/usr/lib/python2.7/dist-packages/networkx/drawing/nx_pydot.py", line 43, in write_dot
      P=to_pydot(G)
    File "/usr/lib/python2.7/dist-packages/networkx/drawing/nx_pydot.py", line 175, in to_pydot
      import pydotplus
  ImportError: No module named pydotplus
  >>> quit()
  root at b1:~# python3
  Python 3.6.7 (default, Oct 22 2018, 11:32:17)
  [GCC 8.2.0] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import networkx
  >>> from networkx.drawing.nx_pydot import write_dot
  >>> write_dot(networkx.Graph(), "/tmp/null")
  Traceback (most recent call last):
    File "<stdin>", line 1, in <module>
    File "<decorator-gen-232>", line 2, in write_dot
    File "/usr/lib/python3/dist-packages/networkx/utils/decorators.py", line 220, in _open_file
      result = func(*new_args, **kwargs)
    File "/usr/lib/python3/dist-packages/networkx/drawing/nx_pydot.py", line 43, in write_dot
      P=to_pydot(G)
    File "/usr/lib/python3/dist-packages/networkx/drawing/nx_pydot.py", line 175, in to_pydot
      import pydotplus
  ModuleNotFoundError: No module named 'pydotplus'
  >>> quit()
  root at b1:~# lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description:    Ubuntu 18.04.1 LTS
  Release:        18.04
  Codename:       bionic

  [Regression Potential]
  Very low as this will just be adding pydotplus to Suggested dependencies.

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