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Examples for using Python with Elixir

The GeoLite2 example app use erlport via export in order to leverage the Whoosh text indexing and search Python package.

It creates a search index from the free GeoLite2 city database and provides an Elixir module to search the city index.

Installation

  • Install Python v3.x
  • Install Elixir v1.4+
  • Setup a virtualenv and activate it
  • Run pip install -r requirements.txt to install the python dependencies
  • Run mix deps.get to install the Hex dependencies

Creating the index

Step into the interactive Elixir console with iex -S mix.

Then run the following function to create the city index:

ElixirPython.GeoLite2.create_index()

Searching

You can search your city index with the following code:

iex(1)> ElixirPython.GeoLite2.search("Berlin")
[%{city: "Berlin", country: "Germany", state: "Land Berlin"},
 %{city: "Berlingen", country: "Belgium", state: "Flanders"},
 %{city: "Falkenberg", country: "Germany", state: "Land Berlin"},
 %{city: "Gosen", country: "Germany", state: "Land Berlin"},
 %{city: "Bernau bei Berlin", country: "Germany", state: "Brandenburg"},
 %{city: "Berlingen", country: "Switzerland", state: "Thurgau"},
 %{city: "Treptow Bezirk", country: "Germany", state: "Land Berlin"},
 %{city: "Heinersdorf", country: "Germany", state: "Land Berlin"},
 %{city: "Stirling", country: "Canada", state: "Alberta"},
 %{city: "New Berlin", country: "United States", state: "Illinois"}]

The default number of returned results is 10.
You can also pass the number of wanted results as the second argument:

iex(2)> ElixirPython.GeoLite2.search("Berlin", 3)
[%{city: "Berlin", country: "Germany", state: "Land Berlin"},
 %{city: "Berlingen", country: "Belgium", state: "Flanders"},
 %{city: "Falkenberg", country: "Germany", state: "Land Berlin"}]