Spaces:
Running
Running
File size: 803 Bytes
6a86ad5 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 |
from sympy.core.singleton import S
from sympy.core.symbol import symbols
from sympy.parsing.ast_parser import parse_expr
from sympy.testing.pytest import raises
from sympy.core.sympify import SympifyError
import warnings
def test_parse_expr():
a, b = symbols('a, b')
# tests issue_16393
assert parse_expr('a + b', {}) == a + b
raises(SympifyError, lambda: parse_expr('a + ', {}))
# tests Transform.visit_Constant
assert parse_expr('1 + 2', {}) == S(3)
assert parse_expr('1 + 2.0', {}) == S(3.0)
# tests Transform.visit_Name
assert parse_expr('Rational(1, 2)', {}) == S(1)/2
assert parse_expr('a', {'a': a}) == a
# tests issue_23092
with warnings.catch_warnings():
warnings.simplefilter('error')
assert parse_expr('6 * 7', {}) == S(42)
|