Here is the content for the series of Build your own Python package:

Make your package installable

Imagine that you have some python codes for analysis and many repetitive tasks. You might want to wrap up the codes, put them somewhere and just call them when you need them, like what you do with numpy by import numpy as np. In fact, you can achieve this with the help of Setuptools, as introduced in the following.

“Setuptools is a collection of enhancements to the Python distutils that allow developers to more easily build and distribute Python packages, especially ones that have dependencies on other packages.” – cite from Setuptools website

Assume we have a package for installation named demo.

Install setuptools
```
pip install setuptools
```

Prepare a setup.py file in the root dir of your package

cd demo
vi setup.py

Here a simple example for setup.py:

"""
Setup script for `demo`
"""

from setuptools import setup, find_packages


setup(
    name = "demo",
    version = "1.0",
    packages = find_packages(),
    include_package_data = True
)

Install your package (copy the code to the path for python site-packages) by:
```
python setup.py install
```
If you will frequently modify your codes (e.g., when developing), I recommend you the development mode:
```
python setup.py develop
```
which will generate a link to your source code. Then you can change your source codes and apply the changes directly without re-installation.
If you want to specify the dependencies for your package, you can use pipreqs:
```
pip install pipreqs
pipreqs myproj
```

Build your own Python package (1)

Make your package installable

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