pip3 install mu-editor                 
Collecting mu-editor
  Using cached mu_editor-1.0.3-py3-none-any.whl (2.0 MB)
Requirement already satisfied: pyqt5==5.14.1 in /usr/lib/python3/dist-packages (from mu-editor) (5.14.1)
Collecting gpiozero>=1.4.1
  Downloading gpiozero-1.5.1-py2.py3-none-any.whl (138 kB)
     |████████████████████████████████| 138 kB 3.1 MB/s 
Collecting pigpio>=1.40.post1
  Using cached pigpio-1.46-py2.py3-none-any.whl (39 kB)
Collecting semver>=2.8.0
  Downloading semver-2.10.0-py2.py3-none-any.whl (12 kB)
Requirement already satisfied: guizero>=1.1.0 in /usr/lib/python3/dist-packages (from mu-editor) (1.1.0)
Collecting pyflakes==2.0.0
  Using cached pyflakes-2.0.0-py2.py3-none-any.whl (53 kB)
Collecting pycodestyle==2.4.0
  Downloading pycodestyle-2.4.0-py2.py3-none-any.whl (62 kB)
     |████████████████████████████████| 62 kB 1.9 MB/s 
Collecting matplotlib==2.2.2
  Using cached matplotlib-2.2.2.tar.gz (37.3 MB)
    ERROR: Command errored out with exit status 1:
     command: /usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-s9u172yz/matplotlib/setup.py'"'"'; __file__='"'"'/tmp/pip-install-s9u172yz/matplotlib/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-s9u172yz/matplotlib/pip-egg-info                                                                                                           
         cwd: /tmp/pip-install-s9u172yz/matplotlib/                                                                                                                                                                                                                            
    Complete output (66 lines):                                                                                                                                                                                                                                                
    IMPORTANT WARNING:                                                                                                                                                                                                                                                         
        pkg-config is not installed.                                                                                                                                                                                                                                           
        matplotlib may not be able to find some of its dependencies                                                                                                                                                                                                            
    ============================================================================                                                                                                                                                                                               
    Edit setup.cfg to change the build options                                                                                                                                                                                                                                 
                                                                                                                                                                                                                                                                               
    BUILDING MATPLOTLIB
                matplotlib: yes [2.2.2]
                    python: yes [3.8.2 (default, Apr 27 2020, 15:53:34)  [GCC
                            9.3.0]]
                  platform: yes [linux]
    
    REQUIRED DEPENDENCIES AND EXTENSIONS
                     numpy: yes [version 1.17.4]
          install_requires: yes [handled by setuptools]
                    libagg: yes [pkg-config information for 'libagg' could not
                            be found. Using local copy.]
                  freetype: no  [The C/C++ header for freetype2 (ft2build.h)
                            could not be found.  You may need to install the
                            development package.]
                       png: no  [pkg-config information for 'libpng' could not
                            be found.]
                     qhull: yes [pkg-config information for 'libqhull' could not
                            be found. Using local copy.]
    
    OPTIONAL SUBPACKAGES
               sample_data: yes [installing]
                  toolkits: yes [installing]
                     tests: no  [skipping due to configuration]
            toolkits_tests: no  [skipping due to configuration]
    
    OPTIONAL BACKEND EXTENSIONS
                    macosx: no  [Mac OS-X only]
                    qt5agg: yes [installing, Qt: 5.12.8, PyQt: 5.14.1; PySide2
                            not found]
                    qt4agg: no  [PySide not found; PyQt4 not found]
                   gtk3agg: yes [installing, version 3.18.24]
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-s9u172yz/matplotlib/setup.py", line 197, in <module>
        msg = pkg.install_help_msg()
      File "/tmp/pip-install-s9u172yz/matplotlib/setupext.py", line 592, in install_help_msg
        release = platform.linux_distribution()[0].lower()
    AttributeError: module 'platform' has no attribute 'linux_distribution'
                 gtk3cairo: yes [installing, version 3.18.24]
                    gtkagg: no  [Requires pygtk]
                     tkagg: yes [installing; run-time loading from Python Tcl /
                            Tk]
                     wxagg: no  [requires wxPython]
                       gtk: no  [Requires pygtk]
                       agg: yes [installing]
                     cairo: yes [installing, pycairo version 1.16.2]
                 windowing: no  [Microsoft Windows only]
    
    OPTIONAL LATEX DEPENDENCIES
                    dvipng: no
               ghostscript: yes [version 9.50]
                     latex: no
                   pdftops: yes [version 0.86.1]
    
    OPTIONAL PACKAGE DATA
                      dlls: no  [skipping due to configuration]
    
    ============================================================================
                            * The following required packages can not be built:
                            * freetype, png
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.