unicodegen.py

import random

def generate(length):
    try:
        get_char = unichr
    except NameError:
        get_char = chr
    # Update this to include code point ranges to be sampled
    include_ranges = [
    (0x30, 0x39),  # numbers
    (0x41, 0x5a),  # uppercase chars
    (0x61, 0x7a),  # lowercase chars
    (0x900, 0x97f),  # devanganari (I don't even care, SexualRhino)
    (0xa8e0, 0xa8fb),  # devanganari extended, minus square blocks
    (0xbc, 0x2af),  # weird characters with accents, etc
    (0x25a0, 0x27ff),  # dingbats, etc
    (0x1f300, 0x1f64f),  # emoticons
    (0x1f910, 0x1f9e6),
    ]
    alphabet = [
       get_char(code_point) for current_range in include_ranges
            for code_point in range(current_range[0], current_range[1] + 1)
    ]
    sr = random.SystemRandom()
    return ''.join(sr.choice(alphabet) for i in range(length))

if __name__ == '__main__':
    print(generate(5))

Available on repl.it here