eval_print.py

eval_print.py

import os
import six
from time import time
from inspect import currentframe
from string import Formatter

string_formatter = Formatter()

devnull = open(os.devnull, 'w')

six.moves.builtins.std_print = print

def print(text, **kwargs):
    caller = currentframe().f_back
    keywords = {kw for _, kw, _, _
                in string_formatter.parse(text) if kw}

    for keyword in keywords:
        value = eval(keyword, caller.f_globals, caller.f_locals)
        text = text.replace("{{{}}}".format(keyword), str(value))

    std_print(text, **kwargs)


name = "oded"
t = time()
for _ in range(50000):
  print("my name is {name} & 2*3={2*3}",
        file=devnull)
std_print("block took {0:.3f} seconds".format(time() - t))