def test_attribute_set_to_value(self):
"""Test setting attribute to a value"""
x = self.X()
x.y = 1
assert 1 == x.y
with attribute_set_to(x, 'y', 2):
assert 2 == x.y
assert 1 == x.y
def test_attribute_set_to_object(self):
"""Test setting attribute to an object"""
x = self.X()
original_object = self.X()
x.y = original_object
assert original_object == x.y
assert original_object is x.y
new_object = self.X()
with attribute_set_to(x, 'y', new_object):
assert new_object == x.y
assert new_object is x.y
assert original_object == x.y
assert original_object is x.y
def _visa_resource_read_termination_set_to_none(
visa_resource: pyvisa.Resource) -> ContextManager:
"""
This context manager works around the problem with 'query_binary_values'
method in pyvisa 1.9.0 that results in visa timeout exception in
drivers which use the method.
Usage:
...
# visa_resource is the variable that refers to the instrument's pyvisa
# resource object
with visa_query_binary_values_fix_for(visa_resource):
visa_resource.query_binary_values(...)
...
"""
return attribute_set_to(visa_resource, '_read_termination', None)