ascii_table__simple_pretty__format.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

__author__ = "ipetrash"


def pretty_table(data, cell_sep=" | ", header_separator=True, align=">") -> str:
    rows = len(data)
    cols = len(data[0])

    col_width = []
    for col in range(cols):
        columns = [str(data[row][col]) for row in range(rows)]
        col_width.append(len(max(columns, key=len)))

    templates = ["{:" + align + "%d}" % width for width in col_width]
    separator = "-+-".join("-" * n for n in col_width)

    lines = []
    for i, row in enumerate(range(rows)):
        result = []
        for col in range(cols):
            value = str(data[row][col])
            item = templates[col].format(value)
            result.append(item)

        lines.append(cell_sep.join(result))

        if i == 0 and header_separator:
            lines.append(separator)

    return "\n".join(lines)


def print_pretty_table(data, cell_sep=" | ", header_separator=True, align=">"):
    print(pretty_table(data, cell_sep, header_separator, align))


if __name__ == "__main__":
    table_data = [
        ["FRUIT", "PERSON", "ANIMAL"],
        ["apples", "Alice", "dogs"],
        ["oranges", "Bob", "cats"],
        ["cherries", "Carol", "moose"],
        ["banana", "David", "goose"],
    ]

    print_pretty_table(table_data, header_separator=False)
    #    FRUIT | PERSON | ANIMAL
    #   apples |  Alice |   dogs
    #  oranges |    Bob |   cats
    # cherries |  Carol |  moose
    #   banana |  David |  goose

    print()

    print_pretty_table(table_data)
    #    FRUIT | PERSON | ANIMAL
    # ---------+--------+-------
    #   apples |  Alice |   dogs
    #  oranges |    Bob |   cats
    # cherries |  Carol |  moose
    #   banana |  David |  goose

    print()

    print_pretty_table([["FRUIT", "PERSON", "ANIMAL"]])