#sample.py
import os
with open("test.py") as file:
    for line in file:
        print(line)

#main.py
import tokenize
import keyword
import io

colored_tokens = []
with open("sample.py", "rb") as file:
    for token in tokenize.tokenize(file.readline):
        if token.type == 59: #encoding. Skip.
            pass
        elif token.type == 1: #name, e.g. a variable or keyword
            if keyword.iskeyword(token.string):
                colored_tokens.append(f"[color=blue]{token.string}[/color]")
            else:
                colored_tokens.append(token.string)
        elif token.type == 3: #string literal
            colored_tokens.append(f"[color=red]{token.string}[/color]")
        else:
            colored_tokens.append(token.string)

print("".join(colored_tokens))

#output:
[color=blue]import[/color]os
[color=blue]with[/color]open([color=red]"test.py"[/color])[color=blue]as[/color]file:
    [color=blue]for[/color]line[color=blue]in[/color]file:
        print(line)