colortable

#!/usr/bin/env python3
#
#   http://tldp.org/HOWTO/Bash-Prompt-HOWTO/x329.html
#
#   This file echoes a bunch of color codes to the
#   terminal to demonstrate what's available.  Each
#   line is the color code of one forground color,
#   out of 17 (default + 16 escapes), followed by a
#   test use of that color on all nine background
#   colors (default + 8 escapes).
#

TEST_TEXT = '  gYw  '   # sample text
PRINT_RAW = False


def test_colors(fg, bg, text=TEST_TEXT, raw=PRINT_RAW):
    if raw:
        escape = r'\033['
    else:
        escape = "\033["

    if bg:
        bg_mod = f"{escape}{bg}m"
    else:
        bg_mod = ''

    return f"{escape}{fg}m{bg_mod}{text}{escape}m"


def print_table(fg_colors, bg_colors):
    print()
    print(' ' * 18 + ''.join(f"{str(x) + 'm':<8}" for x in bg_colors))

    for fg in ['0'] + list(fg_colors):
        for bold in ['', ';1']:
            fgb = str(fg) + bold
            print(" %5sm " % fgb, end='')
            for bg in [None] + list(bg_colors):
                print(test_colors(fg=fgb, bg=bg), end=' ')
            print()


def print_palette():
    if PRINT_RAW:
        escape = r'\033['
    else:
        escape = "\033["

    print()
    i = 0
    for row in [range(40, 48), range(100, 108)]:
        for col in row:
            print(f"{escape}{col}m      {escape}m ", end='')
        print()
        for col in row:
            print(f"{escape}{col}m  xX  {escape}m ", end='')
            i += 1
        print()
        for col in row:
            print(f"{escape}{col}m      {escape}m ", end='')
        print("\n")


print_table(range(30, 38), range(40, 48))
print_table(range(90, 98), range(100, 108))

print()

print_palette()

print()
print('The format for ANSI escapes is "\\033[" + <numbers> + "m"')
print('Multiple semicolon-separated directives may be included in <numbers>')