Create a table from linear texts which contain columns and rows

product.py

import argparse

parser = argparse.ArgumentParser()
parser.add_argument("filename", help="You set here files to parse.")
parser.add_argument(
    "--transpose",
    default=False, action='store_true',
    help="Exchange column header and row header."
)
args = parser.parse_args()

lines = open(args.filename).readlines()
removed_lb_lines = [line.replace('\n', '') for line in lines]

x = []
y = []

is_switched = False
for line in removed_lb_lines:
    if line == '---':
        is_switched = True
        continue

    if args.transpose ^ is_switched:
        y.append(line)
    else:
        x.append(line)


out = ''
out += '\t' + '\t'.join(x) + '\n'
for y_el in y:
    out += y_el + '\n'
print(out)