Python Environment.extend Examples

Example #1

File: test_4_working_with_variables_and_environments.py Project: austvik/diy-lisp

def test_lookup_from_inner_env():
    """The `extend` function returns a new environment extended with more bindings."""

    env = Environment({"foo": 42})
    env = env.extend({"bar": True})
    assert_equals(42, env.lookup("foo"))
    assert_equals(True, env.lookup("bar"))

Example #2

File: test_4_working_with_variables_and_environments.py Project: torgeir/diy-lisp

def test_lookup_from_inner_env():
    """The `extend` function returns a new environment extended with more bindings."""

    env = Environment({"foo": 42})
    env = env.extend({"bar": True})
    assert_equals(42, env.lookup("foo"))
    assert_equals(True, env.lookup("bar"))

Example #3

File: test_4_working_with_variables_and_environments.py Project: austvik/diy-lisp

def test_extend_returns_new_environment():
    """The extend method should create a new environment, leaving the old one unchanged."""

    env = Environment({"foo": 1})
    extended = env.extend({"foo": 2})

    assert_equals(1, env.lookup("foo"))
    assert_equals(2, extended.lookup("foo"))

Example #4

File: test_4_working_with_variables_and_environments.py Project: torgeir/diy-lisp

def test_extend_returns_new_environment():
    """The extend method should create a new environment, leaving the old one unchanged."""

    env = Environment({"foo": 1})
    extended = env.extend({"foo": 2})

    assert_equals(1, env.lookup("foo"))
    assert_equals(2, extended.lookup("foo"))