Questions[pygi](ubuntu)

I've created a python virtual env and I want to intall gi into it. But it returns this error to me.

newtron@newtron:~/Documents/PythonProjects/PyQt/rasp-media$ ./bin/python3 -m pip install PyGObject
Collecting PyGObject
  Downloading PyGObject-3.36.0.tar.gz (714 kB)
     |████████████████████████████████| 714 kB 203 kB/s 
  Installing build dependencies ... error
  ERROR: Command errored out with exit status 1:
   command: /home/newtron/Documents/PythonProjects/PyQt/rasp-media/bin/python3 /home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-0dy6w32x/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel pycairo
       cwd: None
  Complete output (23 lines):
  Collecting setuptools
    Downloading setuptools-46.1.3-py3-none-any.whl (582 kB)
  Collecting wheel
    Downloading wheel-0.34.2-py2.py3-none-any.whl (26 kB)
  Collecting pycairo
    Downloading pycairo-1.19.1.tar.gz (205 kB)
      ERROR: Command errored out with exit status 1:
       command: /home/newtron/Documents/PythonProjects/PyQt/rasp-media/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-od775dbd/pycairo/setup.py'"'"'; __file__='"'"'/tmp/pip-install-od775dbd/pycairo/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-od775dbd/pycairo/pip-egg-info
           cwd: /tmp/pip-install-od775dbd/pycairo/
      Complete output (11 lines):
      Traceback (most recent call last):
        File "<string>", line 1, in <module>
        File "/home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/setuptools/__init__.py", line 20, in <module>
          from setuptools.dist import Distribution, Feature
        File "/home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/setuptools/dist.py", line 35, in <module>
          from setuptools import windows_support
        File "/home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/setuptools/windows_support.py", line 2, in <module>
          import ctypes
        File "/usr/local/lib/python3.8/ctypes/__init__.py", line 7, in <module>
          from _ctypes import Union, Structure, Array
      ModuleNotFoundError: No module named '_ctypes'
      ----------------------------------------
  ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
  ----------------------------------------
ERROR: Command errored out with exit status 1: /home/newtron/Documents/PythonProjects/PyQt/rasp-media/bin/python3 /home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-0dy6w32x/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel pycairo Check the logs for full command output.
newtron@newtron:~/Documents/PythonProjects/PyQt/rasp-media$ ./bin/python3 -m pip install PyGObject
Collecting PyGObject
  Using cached PyGObject-3.36.0.tar.gz (714 kB)
  Installing build dependencies ... error
  ERROR: Command errored out with exit status 1:
   command: /home/newtron/Documents/PythonProjects/PyQt/rasp-media/bin/python3 /home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-tzvaosca/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel pycairo
       cwd: None
  Complete output (23 lines):
  Collecting setuptools
    Using cached setuptools-46.1.3-py3-none-any.whl (582 kB)
  Collecting wheel
    Using cached wheel-0.34.2-py2.py3-none-any.whl (26 kB)
  Collecting pycairo
    Using cached pycairo-1.19.1.tar.gz (205 kB)
      ERROR: Command errored out with exit status 1:
       command: /home/newtron/Documents/PythonProjects/PyQt/rasp-media/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-aotbe4p8/pycairo/setup.py'"'"'; __file__='"'"'/tmp/pip-install-aotbe4p8/pycairo/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-aotbe4p8/pycairo/pip-egg-info
           cwd: /tmp/pip-install-aotbe4p8/pycairo/
      Complete output (11 lines):
      Traceback (most recent call last):
        File "<string>", line 1, in <module>
        File "/home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/setuptools/__init__.py", line 20, in <module>
          from setuptools.dist import Distribution, Feature
        File "/home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/setuptools/dist.py", line 35, in <module>
          from setuptools import windows_support
        File "/home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/setuptools/windows_support.py", line 2, in <module>
          import ctypes
        File "/usr/local/lib/python3.8/ctypes/__init__.py", line 7, in <module>
          from _ctypes import Union, Structure, Array
      ModuleNotFoundError: No module named '_ctypes'
      ----------------------------------------
  ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
  ----------------------------------------
ERROR: Command errored out with exit status 1: /home/newtron/Documents/PythonProjects/PyQt/rasp-media/bin/python3 /home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-tzvaosca/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel pycairo Check the logs for full command output.
newtron@newtron:~/Documents/PythonProjects/PyQt/rasp-media$ ./bin/python3 -m pip install PyGObject
Collecting PyGObject
  Using cached PyGObject-3.36.0.tar.gz (714 kB)
  Installing build dependencies ... error
  ERROR: Command errored out with exit status 1:
   command: /home/newtron/Documents/PythonProjects/PyQt/rasp-media/bin/python3 /home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-ngagzc6u/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel pycairo
       cwd: None
  Complete output (23 lines):
  Collecting setuptools
    Using cached setuptools-46.1.3-py3-none-any.whl (582 kB)
  Collecting wheel
    Using cached wheel-0.34.2-py2.py3-none-any.whl (26 kB)
  Collecting pycairo
    Using cached pycairo-1.19.1.tar.gz (205 kB)
      ERROR: Command errored out with exit status 1:
       command: /home/newtron/Documents/PythonProjects/PyQt/rasp-media/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-kag8ebvt/pycairo/setup.py'"'"'; __file__='"'"'/tmp/pip-install-kag8ebvt/pycairo/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-kag8ebvt/pycairo/pip-egg-info
           cwd: /tmp/pip-install-kag8ebvt/pycairo/
      Complete output (11 lines):
      Traceback (most recent call last):
        File "<string>", line 1, in <module>
        File "/home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/setuptools/__init__.py", line 20, in <module>
          from setuptools.dist import Distribution, Feature
        File "/home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/setuptools/dist.py", line 35, in <module>
          from setuptools import windows_support
        File "/home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/setuptools/windows_support.py", line 2, in <module>
          import ctypes
        File "/usr/local/lib/python3.8/ctypes/__init__.py", line 7, in <module>
          from _ctypes import Union, Structure, Array
      ModuleNotFoundError: No module named '_ctypes'
      ----------------------------------------
  ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
  ----------------------------------------
ERROR: Command errored out with exit status 1: /home/newtron/Documents/PythonProjects/PyQt/rasp-media/bin/python3 /home/newtron/Documents/PythonProjects/PyQt/rasp-media/lib/python3.8/site-packages/pip install --ignore-installed --no-user --prefix /tmp/pip-build-env-ngagzc6u/overlay --no-warn-script-location --no-binary :none: --only-binary :none: -i https://pypi.org/simple -- setuptools wheel pycairo Check the logs for full command output.

Is there any other way to install pygobject in virtual env.

I have referred this link: How to open Nautilus at current command line directory?

but ever since I upgraded to 17.10, running nautilus ., when I am already in a particular directory using cd in the terminal, gives me the following message.

sys:1: PyGIWarning: Nautilus was imported without specifying a version first. Use gi.require_version('Nautilus', '3.0') before import to ensure that the right version gets loaded.
Initializing nautilus-dropbox 2015.10.28

How do I fix this?

I am running Ubuntu 17.10 in Xorg mode

If I want to dynamically add a row to a vbox and populate it... I need a way to see if that row already exists. So the thought train is "Try to fetch the box with builder instance. If it fails, add a row and add the box" If I add the box dynamically, what flags do I have to set or what calls do I have to make in order to be able to fetch it with builder?

I'm writing a small little app that I want to submit to the Ubuntu App Review board, and one thing I'd like to do is for it to show the names of the detected Wireless SSIDs in a combo box. It's a PyGI app.

Has anyone got any pointers on how I can get those SSIDs from the system, preferably through a Python API? From dbus? From NetworkManager?

I'm writing a Python app that is tab-based, and I don't want it to have any additional pop-up dialogs.

I'd like to use the Gtk.AboutDialog functionality, but I don't want it to appear as a separate window. Rather, I'd like it to be embedded in one of the tabs of my Gtk.Notebook (which I've created with Glade).

I could not find any obvious way to do this. Does anyone have any pointers?