| 12345678910111213141516171819202122232425 |
- 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)
|
