python-interpret

#!/usr/bin/env python3.6

# Simulate running code at a python prompt
#
# Separate statements by two newlines
# they will be stripped on output,
# but are used to parse out distinct statements

import io
import re
import sys
import time
import tokenize

# Not used by this script, but allows snippets to skip the import
from tempfile import TemporaryDirectory

try:
    last_t_type = None
    code_tokens = []
    for t in tokenize.generate_tokens(sys.stdin.readline):
        if len(code_tokens) == 0 and t.type == tokenize.DEDENT:
            continue

        code_tokens.append(t)

        if ((t.type == tokenize.NL and t.type == last_t_type)
                or t.type == tokenize.ENDMARKER):
            code = tokenize.untokenize(code_tokens)
            code = re.sub(r"^\\\n", "", code, flags=re.MULTILINE)
            code = code.strip("\n")
            print("\n".join(">>> " + s for s in code.split("\n")))

            compiled_code = compile(code, '', 'single')
            ret = exec(compiled_code, symbol_table)
            code_tokens = []

        last_t_type = t.type
except Exception as e:
    with open('python-interpret.err', 'w') as out:
        out.write(f"Caught exception {e} with tokens:\n")
        for t in code_tokens:
            out.write(repr(t) + "\n")
        out.write("\n")
    raise