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Drone Librarian

A Drone Librarian is a records database for drones.

Default Libraries

There is one drone library: drones.json. You can define it explicitly, or not.

from tdw.librarian import DroneLibrarian

# These constructors will load the same records database.
lib = DroneLibrarian()
lib = DroneLibrarian(library="drones.json")

Command API

Send the add_drone command to add a drone to the scene.

DroneRecordAPI

A record of a drone asset bundle.

from tdw.librarian import DroneRecord

record = DroneRecord() # Creates a record with blank or default values.
from tdw.librarian import DroneRecord 

record = DroneRecord(data=data) # Creates a record from JSON data.

Fields

Field Type Description
name str The name of the record.
urls Dict[str, str] A dictionary of URLs or local filepaths of asset bundles per platform. See: DroneRecord.get_url()

Functions

def get_url(self) -> str:

Returns the URL of the asset bundle for this platform. This is a wrapper for record.urls.

lib = DroneLibrarian()
record = lib.records[0]

print(record.get_url())

DroneLibrarian API

Fields

Field Type Description
library str The path to the records database file.
data dict The raw JSON dictionary loaded from the records database file.
description str A brief description of the library.
records List[DroneRecord] The list of drone records.

Static Functions

def create_library(description: str, path: str) -> None:

Create a new library JSON file.

DroneLibrarian.create_library("My library", path="path/to/new/library.json")
Parameter Type Description
description str A description of the library.
path str The absolute filepath to the .json records database file.
def get_library_filenames() -> List[str]:

Returns a list of the filenames of the libraries of this type in the tdw module.

filenames = DroneLibrarian.get_library_filenames()

print(filenames) # ['drones.json']
def get_default_library() -> List[str]:

Returns the filename of the default library (which is always the first element in the list returned by get_library_filenames().

default_library = DroneLibrarian.get_default_library()

print(default_library) # drones.json

Functions

def get_record(self, name: str) -> Optional[DroneRecord]:

Returns a record with the specified name. If that record can't be found, returns None.

lib = DroneLibrarian()
record = lib.get_record("drone")

print(record.name)  # drone
Parameter Type Description
name str The name of the record.
def search_records(self, search: str) -> List[DroneRecord]:

Returns a list of records whose names include the search keyword.

lib = DroneLibrarian()
records = lib.search_records("drone")

for record in records:
    print(record.name) # drone, etc.
Parameter Type Description
search str The string to search for in the record name.
def add_or_update_record(self, record: DroneRecord, overwrite: bool, write bool = True, quiet: bool = True) -> bool:

Add a new record or update an existing record.

record = define_record() # Provide your own code here.
lib = DroneLibrarian()

lib.add_or_update_record(record, False, write=True, quiet=False)
Parameter Type Description
record DroneRecord The new or modified record.
overwrite bool If True: If there is a record with the same name as this record, replace it with the new record and return True. Otherwise, return False.
If False: If there is a record with the same name as this record, don't add the record, and suggest a new name.
write bool If true, write the library data to disk (overwriting the existing file).
quiet bool If true, don't print out messages to the console.
def remove_record(self, record: Union[str, DroneRecord], write: bool = True) -> bool:

Remove a record. Returns true if the record was removed.

record = define_record() # Provide your own code here.
lib = DroneLibrarian()

lib.remove_record(record) # Returns False.
lib = DroneLibrarian()

lib.remove_record("drone") # Returns True.
Parameter Type Description
record DroneRecord or str The record or the name of the record.
write bool If true, write the library data to disk (overwriting the existing file).
def write(self, pretty=True) -> None:

Write the library data to disk (overwriting the existing file).

Parameter Type Description
pretty bool "Pretty print" the JSON data with line breaks and indentations.
def get_valid_record_name(self, name: str, overwrite: bool) -> Tuple[bool, str, List[str]]:

Generates a valid record name. Returns: true if the name is good as-is, the new name, and a list of problems with the old name.

lib = DroneLibrarian()

ok, name, problems = lib.get_valid_record_name("drone", False)

print(ok) # False
print(name) # droneabcd
print(problems) # ["A record named drone already exists, and we don't want to overwrite it."]
Parameter Type Description
name str The name of a record we'd like to add.
overwrite str If True: raise an exception if a record named name doesn't already exist.
If False: If the record exists, suggest a new name.