Python installation and packages

python_install_build_packages.txt

setup tools:
when ever there isa source distribution which consists of setup.py file, we can directly install using the following command
    # cd foo.1.0/
    # python setup.py install

if we need to split the build we can use the following commands
    # python setup.py build
    # python setup.py install 

prefix, exec-prefix stands for the directories that Python is installed to, and where it finds its libraries at run-time.
By default when we install package in unix/mac using setup tools it will go to prefix/lib/pythonX.Y/site-packages

Alternate installations:
 --user, or --home, or --prefix and --exec-prefix, or --install-base and --install-platbase

we can also install in other network file system as follows:
/usr/local/bin/python setup.py install --prefix=/mnt/@server/export

# custom installation:

Python modules	--install-purelib
extension modules	--install-platlib
all modules	--install-lib
scripts	--install-scripts
data	--install-data
C headers	--install-headers

ex:
python setup.py install --home=~/python \
                        --install-purelib=lib \
                        --install-platlib='lib.$PLAT' \
                        --install-scripts=scripts
                        --install-data=data


# Difference between sdist and bdist :
setup.py sdist creates a source distribution: it contains setup.py, the source files of your module/script (.py files or .c/.cpp for binary modules), your data files, etc. The result is an archive that can then be used to recompile everything on any platform.

setup.py bdist (and bdist_*) creates a built distribution: it includes .pyc files, .so/.dll/.dylib for binary modules, .exe if using py2exe on Windows, your data files... but no setup.py. The result is an archive that is specific to a platform (for example linux-x86_64) and to a version of Python, and that can be installed simply by extracting it into the root of your filesystem (executables are in /usr/bin (or equivalent), data files in /usr/share, modules in /usr/lib/pythonX.X/site-packages/...). You can even build rpm archives that can be directly installed using your package manager.

Creating a Source Distribution:
    # python setup.py sdist
    # python setup.py sdist --formats=gztar,zip
    
We can specify, what are the extra files need to include in source distribution using MANIFEST file - MANIFEST.in
include *.txt
recursive-include examples *.txt *.py
prune examples/sample?/build

Setup tools:
    let say we have a project and below are the following files in that project dir. we need to create a package for the following project.
    setup.py
    src/
        mypkg/
            __init__.py
            module.py
            data/
                tables.dat
                spoons.dat
                forks.dat

In setup.py file:

setup(...,
      packages=['mypkg'],
      package_dir={'mypkg': 'src/mypkg'},
      package_data={'mypkg': ['data/*.dat']},
      )

Installing additional files:
setup(...,
      data_files=[('bitmaps', ['bm/b1.gif', 'bm/b2.gif']),
                  ('config', ['cfg/data.cfg']),
                  ('/etc/init.d', ['init-script'])]
     )

# Upload to the local repository
python setup.py sdist upload -r http://example.com/pypi


################################### PIP ##########################################################
# pip.conf example

[global]
index-url = http://download.zope.org/simple
trusted-host = download.zope.org
               pypi.python.org
               secondary.extra.host
extra-index-url= http://pypi.python.org/simple
                 http://secondary.extra.host/simple
      
##################################################################################################





How to install package from conda:
# conda install pip
# conda install docker-compose
# conda install virtualenv

- if you dont find any package from conda you can search as following
    - # anaconda search -t conda json2xml
- And then you can install has following
    - conda install -c auto json2xml
    - conda install -c anaconda beautifulsoup4
    

How to Remove Ananconda: 7153
# conda install anaconda-clean
# anaconda-clean --yes
# rm -rf ~/anaconda3/
# rm -rf ~/.condarc ~/.conda ~/.continuum