installing matplotlib fails using pip on python3

[Omnipresent]

I'm trying to install matplotlib but getting the errors below

(cv3)
~/code                                                                                                                                                      
▶ pip install matplotlib
Collecting matplotlib
  Using cached matplotlib-1.4.3.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 20, in <module>
      File "/private/var/folders/c5/885z1_zn5z985rrq1bz7398r0000gn/T/pip-build-lfkqop5c/matplotlib/setup.py", line 155, in <module>
        result = package.check()
      File "/private/var/folders/c5/885z1_zn5z985rrq1bz7398r0000gn/T/pip-build-lfkqop5c/matplotlib/setupext.py", line 961, in check
        min_version='2.3', version=version)
      File "/private/var/folders/c5/885z1_zn5z985rrq1bz7398r0000gn/T/pip-build-lfkqop5c/matplotlib/setupext.py", line 445, in _check_for_pkg_config
        if (not is_min_version(version, min_version)):
      File "/private/var/folders/c5/885z1_zn5z985rrq1bz7398r0000gn/T/pip-build-lfkqop5c/matplotlib/setupext.py", line 173, in is_min_version
        return found_version >= expected_version
      File "/usr/local/Cellar/python3/3.5.0/Frameworks/Python.framework/Versions/3.5/lib/python3.5/distutils/version.py", line 70, in __ge__
        c = self._cmp(other)
      File "/usr/local/Cellar/python3/3.5.0/Frameworks/Python.framework/Versions/3.5/lib/python3.5/distutils/version.py", line 337, in _cmp
        if self.version < other.version:
    TypeError: unorderable types: str() < int()
    ============================================================================
    Edit setup.cfg to change the build options

    BUILDING MATPLOTLIB
                matplotlib: yes [1.4.3]
                    python: yes [3.5.0 (default, Sep 24 2015, 19:45:12)  [GCC
                            4.2.1 Compatible Apple LLVM 6.1.0 (clang-602.0.53)]]
                  platform: yes [darwin]

    REQUIRED DEPENDENCIES AND EXTENSIONS
                     numpy: yes [version 1.9.3]
                       six: yes [six was not found.pip will attempt to install
                            it after matplotlib.]
                  dateutil: yes [dateutil was not found. It is required for date
                            axis support. pip/easy_install may attempt to
                            install it after matplotlib.]
                      pytz: yes [pytz was not found. pip will attempt to install
                            it after matplotlib.]
                   tornado: yes [using tornado version 4.2.1]
                 pyparsing: yes [pyparsing was not found. It is required for
                            mathtext support. pip/easy_install may attempt to
                            install it after matplotlib.]
                     pycxx: yes [Official versions of PyCXX are not compatible
                            with matplotlib on Python 3.x, since they lack
                            support for the buffer object.  Using local copy]
                    libagg: yes [pkg-config information for 'libagg' could not
                            be found. Using local copy.]

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/c5/885z1_zn5z985rrq1bz7398r0000gn/T/pip-build-lfkqop5c/matplotlib

More information about my environment:

▶ python --version
Python 3.5.0
▶ brew install pkg-config
Warning: pkg-config-0.28 already installed

[tacaswell]

The exception is coming out of disutils and from looking at the order of external packages we check I think that is due to isuess with FreeType. Make sure you have the dev-version of that installed.

We had a flurry of issues like this a while ago and I think it is fixed on current master. Can you try installing master or the 1.5.0rc1 release candidate?

[Omnipresent]

Thanks. Installing from master worked for me.

[tacaswell]

Great!