A Flat Table

The Problem

Say we want to transform this list of records into a table with Name and Email columns:

[
    {
        "name": "Robert Pringles",
        "email": "bob@pringles.pop"
    },
    {
        "name": "Daniel Sausage",
        "email": "danny@pringles.pop"
    },
    {
        "name": "Charlie Marmalade",
        "email": "charlie@pringles.pop"
    }
]

We’ll achieve this by creating a column set then passing it – and the input data – into a renderer.

Code Sample

In the code below, we:

1. Create a Columns column set.

2. Add Name and Email columns to the set. The first argument of Columns.add() is the column’s name and the second is the source key in our input data.

3. Create a renderers.RowsRenderer renderer for our column set.

4. Render the input data.

from rolumns import Columns
from rolumns.renderers import RowsRenderer

data = [
    {
        "name": "Robert Pringles",
        "email": "bob@pringles.pop",
    },
    {
        "name": "Daniel Sausage",
        "email": "danny@pringles.pop",
    },
    {
        "name": "Charlie Marmalade",
        "email": "charlie@pringles.pop",
    },
]

columns = Columns()
columns.add("Name", "name")
columns.add("Email", "email")

renderer = RowsRenderer(columns)
rows = renderer.render(data)

print(list(rows))

Result

Each object yielded by the rows iterator represents a row in a table, and each row is a list of its cells:

 [['Name',              'Email'],
  ['Robert Pringles',   'bob@pringles.pop'],
  ['Daniel Sausage',    'danny@pringles.pop'],
  ['Charlie Marmalade', 'charlie@pringles.pop']]