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Obitools doesn't install well

Hello everyone, I'm new in the python coding and for an university work I need to use the package obitools on Linux. I'm on a PC which works on Windows 10 and I use a virtual box to run Ubuntu 18.04. When i try to install the obitools package I always have the same message :

Traceback (most recent call last):
  File "setup.py", line 37, in <module>
    serenity=serenity_mode(PACKAGE,VERSION)
  File "distutils.ext/obidistutils/serenity/__init__.py", line 109, in serenity_mode
    serenity_snake(args.virtual,package,version)
  File "distutils.ext/obidistutils/serenity/__init__.py", line 58, in serenity_snake
    virtualpython=serenity_virtualenv(envname,package,version,minversion=minversion)
  File "distutils.ext/obidistutils/serenity/virtual.py", line 105, in serenity_virtualenv
    ok = (is_good_python27(python) and 
  File "distutils.ext/obidistutils/serenity/checkpython.py", line 143, in is_good_python27
    rep = is_python27(path) and \
  File "distutils.ext/obidistutils/serenity/checkpython.py", line 41, in is_python27
    return     pythonversion >=StrictVersion("2.7") \
  File "/usr/lib/python2.7/distutils/version.py", line 140, in __cmp__
    compare = cmp(self.version, other.version)
AttributeError: StrictVersion instance has no attribute 'version'

You can now use OBITools

The computer tell me that I can use obitools but all the commands I tried return me : command name : command not found. I think it's because of the error message above, but as said earlier I'm new in python and on linux so I don't know what to do. I searched any help on internet by taping the error but i didn't found anything interesting.

I really hope some one can help me to run obitools. Thank's in advance.

software error

I've just tried and I get this :

UnsatisfiableError: The following specifications were found to be incompatible with each other:
Package virtualenv conflicts for:
obitools -> virtualenv[version='>=1.11.0']
Package wheel conflicts for:
obitools -> wheel[version='>=0.24.0']
Package sqlite conflicts for:
python=2.7 -> sqlite[version='>=3.20.1,<4.0a0|>=3.22.0,<4.0a0|>=3.23.1,<4.0a0|>=3.25.2,<4.0a0|>=3.25.3,<4.0a0|>=3.27.2,<4.0a0|>=3.29.0,<4.0a0|>=3.30.0,<4.0a0']
Package esmre conflicts for:
obitools -> esmre
Package sphinx conflicts for:
obitools -> sphinx[version='>=1.2.0']
Package cython conflicts for:
obitools -> cython[version='0.21.*|>=0.24']
Package ncurses conflicts for:
python=2.7 -> ncurses[version='6.0.*|>=6.0,<7.0a0|>=6.1,<7.0a0']
Package zlib conflicts for:
python=2.7 -> zlib[version='>=1.2.11,<1.3.0a0']
Package openssl conflicts for:
python=2.7 -> openssl[version='1.0.*|1.0.*,>=1.0.2l,<1.0.3a|>=1.0.2m,<1.0.3a|>=1.0.2n,<1.0.3a|>=1.0.2o,<1.0.3a|>=1.0.2p,<1.0.3a|>=1.1.1a,<1.1.2a|>=1.1.1b,<1.1.2a|>=1.1.1c,<1.1.2a|>=1.1.1d,<1.1.2a']
Package xorg-libxau conflicts for:
obitools -> xorg-libxau
Package pip conflicts for:
python=2.7 -> pip
Package ca-certificates conflicts for:
python=2.7 -> ca-certificates
Package libgcc-ng conflicts for:
python=2.7 -> libgcc-ng[version='>=7.2.0|>=7.3.0']
obitools -> libgcc-ng[version='>=7.3.0']
Package libffi conflicts for:
python=2.7 -> libffi[version='3.2.*|>=3.2.1,<4.0a0']
Package tk conflicts for:
python=2.7 -> tk[version='8.6.*|>=8.6.7,<8.7.0a0|>=8.6.8,<8.7.0a0']
Package libstdcxx-ng conflicts for:
python=2.7 -> libstdcxx-ng[version='>=7.2.0|>=7.3.0']
Package ipython conflicts for:
obitools -> ipython[version='>=3.0.0|>=3.0.0,<6.0']
Package xorg-libx11 conflicts for:
obitools -> xorg-libx11
Package readline conflicts for:
python=2.7 -> readline[version='7.*|>=7.0,<8.0a0']

Output of python --version?

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