Example of how to print aligned a table from a list of dicts

table_alignment.py

from operator import itemgetter
from typing import (Any,
                    Dict,
                    Iterable,
                    Iterator,
                    List,
                    Sequence)


def max_length(objects: Iterable[Any]) -> int:
    """Returns maximum string length of a sequence of objects"""
    strings = map(str, objects)
    return max(map(len, strings))


def values_max_length(dicts: Sequence[Dict[str, Any]],
                      *,
                      key: str) -> int:
    """Returns maximum string length of dicts values for specific key"""
    return max_length(map(itemgetter(key), dicts))


def to_aligned_data(dicts: Sequence[Dict[str, Any]],
                    *,
                    keys: List[str],
                    sep: str = ' ') -> Iterator[str]:
    """Prints a sequence of dicts in a form of a left aligned table"""
    lengths = (values_max_length(dicts, key=key) 
               for key in keys)

    format_string = sep.join(map('{{:{}}}'.format, lengths))

    for row in map(itemgetter(*keys), dicts):
        yield format_string.format(*row)


if __name__ == '__main__':
    data = [{'Key': '1',
             'Title': 'Salvation.S02E11.HDTV.x264-KILLERS',
             'Seeds': '262',
             'Leechers': '19'},
            {'Key': '2',
             'Title': 'Salvation.S02E13.WEB.x264-TBS[ettv]',
             'Seeds': '229',
             'Leechers': '25'},
            {'Key': '3',
             'Title': 'Salvation.S02E08.HDTV.x264-KILLERS',
             'Seeds': '178',
             'Leechers': '21'},
            {'Key': '4',
             'Title': 'Salvation.S02E01.HDTV.x264-KILLERS',
             'Seeds': '144',
             'Leechers': '11'},
            {'Key': '5',
             'Title': 'Salvation.S02E09.HDTV.x264-SVA[ettv]',
             'Seeds': '129',
             'Leechers': '14'}]
    keys = ['Key', 'Title', 'Seeds', 'Leechers']
    print(*to_aligned_data(data, keys=keys),
          sep='\n')
# 1 Salvation.S02E11.HDTV.x264-KILLERS   262 19
# 2 Salvation.S02E13.WEB.x264-TBS[ettv]  229 25
# 3 Salvation.S02E08.HDTV.x264-KILLERS   178 21
# 4 Salvation.S02E01.HDTV.x264-KILLERS   144 11
# 5 Salvation.S02E09.HDTV.x264-SVA[ettv] 129 14
    keys = ['Title', 'Leechers']
    print(*to_aligned_data(data, keys=keys),
          sep='\n')
# Salvation.S02E11.HDTV.x264-KILLERS   19
# Salvation.S02E13.WEB.x264-TBS[ettv]  25
# Salvation.S02E08.HDTV.x264-KILLERS   21
# Salvation.S02E01.HDTV.x264-KILLERS   11
# Salvation.S02E09.HDTV.x264-SVA[ettv] 14
    keys = ['Key', 'Title', 'Seeds', 'Leechers']
    print(*to_aligned_data(data, keys=keys, sep=' ' * 5),
          sep='\n')
# 1     Salvation.S02E11.HDTV.x264-KILLERS       262     19
# 2     Salvation.S02E13.WEB.x264-TBS[ettv]      229     25
# 3     Salvation.S02E08.HDTV.x264-KILLERS       178     21
# 4     Salvation.S02E01.HDTV.x264-KILLERS       144     11
# 5     Salvation.S02E09.HDTV.x264-SVA[ettv]     129     14