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Creating a gammapy env using conda

See original GitHub issue

Hi all,

I have followed the documentation and tried to install a fresh version of gammapy under ubuntu and conda 4.5.11. I have unfortunately a crash:

[4:37pm] /home/bruno/MesProgrammes> curl -O http://gammapy.org/download/install/gammapy-0.8-environment.yml
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   656  100   656    0     0   2877      0 --:--:-- --:--:-- --:--:--  2877
[4:38pm] /home/bruno/MesProgrammes> conda env create -f gammapy-0.8-environment.yml
Solving environment: failed

UnsatisfiableError: The following specifications were found to be in conflict:
  - matplotlib==2.2.3 -> pyqt=5.9 -> qt[version='5.9.*,>=5.9.6,<5.10.0a0'] -> sqlite[version='>=3.24.0,<4.0a0'] -> readline[version='>=7.0,<8.0a0'] -> ncurses[version='>=6.1,<6.2.0a0']
  - matplotlib==2.2.3 -> tk[version='8.6.*,>=8.6.7,<8.7.0a0']
  - python==3.6
Use "conda info <package>" to see the dependencies for each package.

Have you encountered this issue? The output of the command ‘conda info matplotlib==2.2.3’ is given here:

[4:43pm] /home/bruno/MesProgrammes/gammapy/gammapy> conda info matplotlib==2.2.3

matplotlib 2.2.3 py35hb69df0a_0
-------------------------------
file name   : matplotlib-2.2.3-py35hb69df0a_0.tar.bz2
name        : matplotlib
version     : 2.2.3
build string: py35hb69df0a_0
build number: 0
channel     : https://repo.anaconda.com/pkgs/main/linux-64
size        : 6.7 MB
arch        : None
constrains  : ()
license     : PSF-based
license_family: PSF
md5         : 6d6e786bdb82b24950e8e0ee123acb9a
platform    : None
subdir      : linux-64
timestamp   : 1534273740421
url         : https://repo.anaconda.com/pkgs/main/linux-64/matplotlib-2.2.3-py35hb69df0a_0.tar.bz2
dependencies:
    cycler >=0.10
    freetype >=2.9.1,<3.0a0
    icu >=58.2,<59.0a0
    kiwisolver
    libgcc-ng >=7.2.0
    libpng >=1.6.34,<1.7.0a0
    libstdcxx-ng >=7.2.0
    numpy
    pyparsing
    pyqt 5.9.*
    python >=3.5,<3.6.0a0
    python-dateutil
    pytz
    setuptools
    tk 8.6.*
    tk >=8.6.7,<8.7.0a0
    tornado
    zlib >=1.2.11,<1.3.0a0

matplotlib 2.2.3 py27hb69df0a_0
-------------------------------
file name   : matplotlib-2.2.3-py27hb69df0a_0.tar.bz2
name        : matplotlib
version     : 2.2.3
build string: py27hb69df0a_0
build number: 0
channel     : https://repo.anaconda.com/pkgs/main/linux-64
size        : 6.5 MB
arch        : None
constrains  : ()
license     : PSF-based
license_family: PSF
md5         : 5c32641e48b1a3efb40dd797c5691943
platform    : None
subdir      : linux-64
timestamp   : 1534273730171
url         : https://repo.anaconda.com/pkgs/main/linux-64/matplotlib-2.2.3-py27hb69df0a_0.tar.bz2
dependencies:
    backports.functools_lru_cache
    cycler >=0.10
    freetype >=2.9.1,<3.0a0
    functools32
    icu >=58.2,<59.0a0
    kiwisolver
    libgcc-ng >=7.2.0
    libpng >=1.6.34,<1.7.0a0
    libstdcxx-ng >=7.2.0
    numpy
    pyparsing
    pyqt 5.9.*
    python >=2.7,<2.8.0a0
    python-dateutil
    pytz
    setuptools
    subprocess32
    tk 8.6.*
    tk >=8.6.7,<8.7.0a0
    tornado
    zlib >=1.2.11,<1.3.0a0

matplotlib 2.2.3 py37hb69df0a_0
-------------------------------
file name   : matplotlib-2.2.3-py37hb69df0a_0.tar.bz2
name        : matplotlib
version     : 2.2.3
build string: py37hb69df0a_0
build number: 0
channel     : https://repo.anaconda.com/pkgs/main/linux-64
size        : 6.6 MB
arch        : None
constrains  : ()
license     : PSF-based
license_family: PSF
md5         : a4fa9d10f491522f15789ba6707fce4f
platform    : None
subdir      : linux-64
timestamp   : 1534273737662
url         : https://repo.anaconda.com/pkgs/main/linux-64/matplotlib-2.2.3-py37hb69df0a_0.tar.bz2
dependencies:
    cycler >=0.10
    freetype >=2.9.1,<3.0a0
    icu >=58.2,<59.0a0
    kiwisolver
    libgcc-ng >=7.2.0
    libpng >=1.6.34,<1.7.0a0
    libstdcxx-ng >=7.2.0
    numpy
    pyparsing
    pyqt 5.9.*
    python >=3.7,<3.8.0a0
    python-dateutil
    pytz
    setuptools
    tk 8.6.*
    tk >=8.6.7,<8.7.0a0
    tornado
    zlib >=1.2.11,<1.3.0a0

matplotlib 2.2.3 py36hb69df0a_0
-------------------------------
file name   : matplotlib-2.2.3-py36hb69df0a_0.tar.bz2
name        : matplotlib
version     : 2.2.3
build string: py36hb69df0a_0
build number: 0
channel     : https://repo.anaconda.com/pkgs/main/linux-64
size        : 6.6 MB
arch        : None
constrains  : ()
license     : PSF-based
license_family: PSF
md5         : b52690dbd6940b4c1ba3b8c1ef7ed979
platform    : None
subdir      : linux-64
timestamp   : 1534273679230
url         : https://repo.anaconda.com/pkgs/main/linux-64/matplotlib-2.2.3-py36hb69df0a_0.tar.bz2
dependencies:
    cycler >=0.10
    freetype >=2.9.1,<3.0a0
    icu >=58.2,<59.0a0
    kiwisolver
    libgcc-ng >=7.2.0
    libpng >=1.6.34,<1.7.0a0
    libstdcxx-ng >=7.2.0
    numpy
    pyparsing
    pyqt 5.9.*
    python >=3.6,<3.7.0a0
    python-dateutil
    pytz
    setuptools
    tk 8.6.*
    tk >=8.6.7,<8.7.0a0
    tornado
    zlib >=1.2.11,<1.3.0a0

Cheers, Bruno