geodesy.props

geographic_msgs/KeyValue property interface for Geographic Information messages.

geodesy.props.get(msg, key)

Get property value.

Parameters:

• msg – Message containing properties.
• key – Property key to match.

Returns:

Corresponding value, if defined; None otherwise. Beware: the value may be ‘’, which evaluates False as a predicate, use is not None to test for presence.

geodesy.props.match(msg, key_set)

Match message properties.

Parameters:

• msg – Message containing properties.
• key_set – Set of property keys to match.

Returns:

(key, value) of first property matched; None otherwise.

Raises :

ValueError if key_set is not a set

geodesy.props.put(msg, key, val='')

Add KeyValue to message properties.

Parameters:

• msg – Message to update.
• key – Property key name.
• value – Corresponding value string (default ‘’).