hello_world.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

__author__ = "ipetrash"


import hashlib
import math

# pip install simpleeval
from simpleeval import simple_eval, SimpleEval, EvalWithCompoundTypes


print(simple_eval("21 + 21"))  # 42
print(simple_eval("'21' + '21'"))  # '2121'
print(simple_eval("int('21' + '21')"))  # 2121
print()

print(simple_eval("2 + 2 * 2"))  # 6
print(simple_eval("10 ** 123"))
# 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

print(simple_eval("21 + 19 / 7 + (8 % 3) ** 9"))  # 535.7142857142857
print()

# Call methods
print(simple_eval("'1,2,3,4'.split(',')"))  # ['1', '2', '3', '4']
print(simple_eval("'+'.join('1234')"))  # 1+2+3+4
print()

print(EvalWithCompoundTypes().eval('list("Hello").count("l")'))  # 2
print(simple_eval('list("Hello").count("l")', functions={"list": list}))  # 2
print()

# User functions
print(simple_eval("square(11)", functions={"square": lambda x: x * x}))  # 121

print(
    simple_eval(
        "abs(sin(3) * cos(3))", functions={"sin": math.sin, "cos": math.cos, "abs": abs}
    )
)
# 0.13970774909946293


def my_md5(value):
    return hashlib.md5(bytes(value, "utf-8")).hexdigest()


print(
    simple_eval("md5('Hello World!')", functions={"md5": my_md5})
)
# ed076287532e86365e841e92bfc50d8c

print(simple_eval("list('1234')", functions={"list": list}))  # ['1', '2', '3', '4']
print()

# Using SimpleEval class
my_eval = SimpleEval()
my_eval.names["a"] = 2
my_eval.functions["square"] = lambda x: x * x

print(my_eval.eval("1 + 1 * a"))  # 3
print(my_eval.eval("square(1 + 1 * a)"))  # 9