def main():
"""Main Read - Eval - Print - Loop.
"""
while True:
try:
line = input("> ")
print(evaluate(line))
except (SyntaxError, ValueError) as e:
print(e)
except EOFError:
print() # Print empty line
break
def test_log_precedence():
assert evaluate('log(1 + 1)') == evaluate('log(2)') == 0.69314718055994530942
assert evaluate('log 1 + 1') == 1.0
def test_evaluate_negative_number():
assert evaluate('-1') == -1.0
def test_evaluate_with_function():
assert evaluate('log 2') == evaluate('log(2)') == 0.69314718055994530942
def test_evaluate_complex_expression():
assert evaluate('3 + 4 * 2 / ( 1 - 5 )') == 1.0
def test_evaluate_simple_sum():
assert evaluate('1 + 2') == 3.0
def test_assert_simple_equation():
assert evaluate('2 * x = 1') == 'x = 0.5'
def test_solve_trivial_equation():
assert evaluate('x = 1') == 'x = 1.0'