def enumerate_attributes(self,
root='',
writeable=True,
visibility='simple'):
# root can be AcquisitionAttributes, CameraAttributes,
# CameraInformation and the like
if visibility == 'simple':
visibility = nv.IMAQdxAttributeVisibilitySimple
elif visibility == 'intermediate':
visibility = nv.IMAQdxAttributeVisibilityIntermediate
elif visibility == 'advanced':
visibility = nv.IMAQdxAttributeVisibilityAdvanced
else:
raise Exception("visibility can be 'simple', "
"'inetermediate' or 'advanced'.")
attrs = nv.IMAQdxEnumerateAttributes2(self.imaqdx,
bytes(root, encoding='utf8'),
visibility)
# returns an iterable conveniently
if writeable:
attrs_writeable = []
for attr in attrs:
if nv.IMAQdxIsAttributeWritable(self.imaqdx, attr.Name):
attrs_writeable.append(attr)
return attrs_writeable # this one return list
return attrs # this one return ImaqArray
def get_attribute_names(self, visibility_level, writeable_only=True):
"""Return a list of all attribute names of readable attributes, for the given
visibility level. Optionally return only writeable attributes"""
visibilities = {
'simple': nv.IMAQdxAttributeVisibilitySimple,
'intermediate': nv.IMAQdxAttributeVisibilityIntermediate,
'advanced': nv.IMAQdxAttributeVisibilityAdvanced,
}
visibility_level = visibilities[visibility_level.lower()]
attributes = []
for a in nv.IMAQdxEnumerateAttributes2(self.imaqdx, b'',
visibility_level):
if writeable_only and not a.Writable:
continue
if not a.Readable:
continue
attributes.append(a.Name.decode('utf8'))
return sorted(attributes)