NetworkTable

class ntcore.NetworkTable

Bases: pybind11_object

A network table that knows its subtable path. @ingroup ntcore_cpp_api

PATH_SEPARATOR_CHAR = '/'

addListener(*args, **kwargs)

Overloaded function.

addListener(self: ntcore._ntcore.NetworkTable, eventMask: int, listener: Callable[[ntcore._ntcore.NetworkTable, str, ntcore._ntcore.Event], None]) -> int

Listen to topics only within this table.

Parameters:

eventMask – Bitmask of EventFlags values
listener – listener to add

Returns:

Listener handle

addListener(self: ntcore._ntcore.NetworkTable, key: str, eventMask: int, listener: Callable[[ntcore._ntcore.NetworkTable, str, ntcore._ntcore.Event], None]) -> int

Listen to a single key.

Parameters:

key – the key name
eventMask – Bitmask of EventFlags values
listener – listener to add

Returns:

Listener handle

addSubTableListener(listener: Callable[[ntcore._ntcore.NetworkTable, str, ntcore._ntcore.NetworkTable], None]) → int

Listen for sub-table creation. This calls the listener once for each newly created sub-table. It immediately calls the listener for any existing sub-tables.

Parameters:: listener – listener to add
Returns:: Listener handle

static basenameKey(key: str) → str

Gets the “base name” of a key. For example, “/foo/bar” becomes “bar”. If the key has a trailing slash, returns an empty string.

Parameters:: key – key
Returns:: base name

clearPersistent(key: str) → None

Stop making a key’s value persistent through program restarts. The key cannot be null.

Parameters:: key – the key name

containsKey(key: str) → bool

Determines whether the given key is in this table.

Parameters:: key – the key to search for
Returns:: true if the table as a value assigned to the given key

containsSubTable(key: str) → bool

Determines whether there exists a non-empty subtable for this key in this table.

Parameters:: key – the key to search for
Returns:: true if there is a subtable with the key which contains at least one key/subtable of its own

getBoolean(key: str, defaultValue: object) → object

Gets the boolean associated with the given name. If the key does not exist or is of different type, it will return the default value.

Parameters:

key – the key to look up
defaultValue – the value to be returned if no value is found

Returns:

the value associated with the given key or the given default value if there is no value associated with the key

getBooleanArray(key: str, defaultValue: object) → object

Returns the boolean array the key maps to. If the key does not exist or is of different type, it will return the default value.

Parameters:

key – the key to look up
defaultValue – the value to be returned if no value is found

Returns:

the value associated with the given key or the given default value if there is no value associated with the key

@note This makes a copy of the array. If the overhead of this is a concern, use GetValue() instead.

@note The returned array is std::vector<int> instead of std::vector<bool> because std::vector<bool> is special-cased in C++. 0 is false, any non-zero value is true.

getBooleanArrayTopic(name: str) → ntcore._ntcore.BooleanArrayTopic

Get boolean[] topic.

Parameters:: name – topic name
Returns:: BooleanArrayTopic

getBooleanTopic(name: str) → ntcore._ntcore.BooleanTopic

Get boolean topic.

Parameters:: name – topic name
Returns:: BooleanTopic

getDoubleArrayTopic(name: str) → ntcore._ntcore.DoubleArrayTopic

Get double[] topic.

Parameters:: name – topic name
Returns:: DoubleArrayTopic

getDoubleTopic(name: str) → ntcore._ntcore.DoubleTopic

Get double topic.

Parameters:: name – topic name
Returns:: DoubleTopic

getEntry(key: str) → ntcore._ntcore.NetworkTableEntry

Gets the entry for a subkey.

Parameters:: key – the key name
Returns:: Network table entry.

getFloatArrayTopic(name: str) → ntcore._ntcore.FloatArrayTopic

Get float[] topic.

Parameters:: name – topic name
Returns:: FloatArrayTopic

getFloatTopic(name: str) → ntcore._ntcore.FloatTopic

Get float topic.

Parameters:: name – topic name
Returns:: FloatTopic

static getHierarchy(key: str) → List[str]

Gets a list of the names of all the super tables of a given key. For example, the key “/foo/bar/baz” has a hierarchy of “/”, “/foo”, “/foo/bar”, and “/foo/bar/baz”.

Parameters:: key – the key
Returns:: List of super tables

getInstance() → ntcore._ntcore.NetworkTableInstance

Gets the instance for the table.

Returns:: Instance

getIntegerArrayTopic(name: str) → ntcore._ntcore.IntegerArrayTopic

Get integer[] topic.

Parameters:: name – topic name
Returns:: IntegerArrayTopic

getIntegerTopic(name: str) → ntcore._ntcore.IntegerTopic

Get integer topic.

Parameters:: name – topic name
Returns:: IntegerTopic

getKeys(types: int = 0) → List[str]

Gets all keys in the table (not including sub-tables).

Parameters:: types – bitmask of types; 0 is treated as a “don’t care”.
Returns:: keys currently in the table

getNumber(key: str, defaultValue: object) → object

Gets the number associated with the given name.

Parameters:

key – the key to look up
defaultValue – the value to be returned if no value is found

Returns:

the value associated with the given key or the given default value if there is no value associated with the key

getNumberArray(key: str, defaultValue: object) → object

Returns the number array the key maps to. If the key does not exist or is of different type, it will return the default value.

Parameters:

key – the key to look up
defaultValue – the value to be returned if no value is found

Returns:

the value associated with the given key or the given default value if there is no value associated with the key

@note This makes a copy of the array. If the overhead of this is a concern, use GetValue() instead.

getPath() → str

Gets the full path of this table. Does not include the trailing “/”.

Returns:: The path (e.g “”, “/foo”).

getRaw(key: str, defaultValue: object) → object

Returns the raw value (byte array) the key maps to. If the key does not exist or is of different type, it will return the default value.

Parameters:

key – the key to look up
defaultValue – the value to be returned if no value is found

Returns:

the value associated with the given key or the given default value if there is no value associated with the key

@note This makes a copy of the raw contents. If the overhead of this is a concern, use GetValue() instead.

getRawTopic(name: str) → ntcore._ntcore.RawTopic

Get raw topic.

Parameters:: name – topic name
Returns:: BooleanArrayTopic

getString(key: str, defaultValue: object) → object

Gets the string associated with the given name. If the key does not exist or is of different type, it will return the default value.

Parameters:

key – the key to look up
defaultValue – the value to be returned if no value is found

Returns:

the value associated with the given key or the given default value if there is no value associated with the key

getStringArray(key: str, defaultValue: object) → object

Returns the string array the key maps to. If the key does not exist or is of different type, it will return the default value.

Parameters:

key – the key to look up
defaultValue – the value to be returned if no value is found

Returns:

the value associated with the given key or the given default value if there is no value associated with the key

@note This makes a copy of the array. If the overhead of this is a concern, use GetValue() instead.

getStringArrayTopic(name: str) → ntcore._ntcore.StringArrayTopic

Get String[] topic.

Parameters:: name – topic name
Returns:: StringArrayTopic

getStringTopic(name: str) → ntcore._ntcore.StringTopic

Get String topic.

Parameters:: name – topic name
Returns:: StringTopic

getSubTable(key: str) → ntcore._ntcore.NetworkTable

Returns the table at the specified key. If there is no table at the specified key, it will create a new table

Parameters:: key – the key name
Returns:: the networktable to be returned

getSubTables() → List[str]

Gets the names of all subtables in the table.

Returns:: subtables currently in the table

getTopic(name: str) → ntcore._ntcore.Topic

Get (generic) topic.

Parameters:: name – topic name
Returns:: Topic

getTopicInfo(types: int = 0) → List[ntcore._ntcore.TopicInfo]

Gets topic information for all keys in the table (not including sub-tables).

Parameters:: types – bitmask of types; 0 is treated as a “don’t care”.
Returns:: topic information for keys currently in the table

getTopics(types: int = 0) → List[ntcore._ntcore.Topic]

Gets all topics in the table (not including sub-tables).

Parameters:: types – bitmask of types; 0 is treated as a “don’t care”.
Returns:: topic for keys currently in the table

getValue(key: str, value: object) → object

isPersistent(key: str) → bool

Returns whether the value is persistent through program restarts. The key cannot be null.

Parameters:: key – the key name

static normalizeKey(key: str, withLeadingSlash: bool = True) → str

Normalizes an network table key to contain no consecutive slashes and optionally start with a leading slash. For example:

<pre><code> normalizeKey(“/foo/bar”, true) == “/foo/bar” normalizeKey(“foo/bar”, true) == “/foo/bar” normalizeKey(“/foo/bar”, false) == “foo/bar” normalizeKey(“foo//bar”, false) == “foo/bar” </code></pre>

Parameters:

key – the key to normalize
withLeadingSlash – whether or not the normalized key should begin with a leading slash

Returns:

normalized key

putBoolean(key: str, value: bool) → bool

Put a boolean in the table

Parameters:

key – the key to be assigned to
value – the value that will be assigned

Returns:

False if the table key already exists with a different type

putBooleanArray(key: str, value: List[int]) → bool

Put a boolean array in the table

Parameters:

key – the key to be assigned to
value – the value that will be assigned

Returns:

False if the table key already exists with a different type

@note The array must be of int’s rather than of bool’s because std::vector<bool> is special-cased in C++. 0 is false, any non-zero value is true.

putNumber(key: str, value: float) → bool

Put a number in the table

Parameters:

key – the key to be assigned to
value – the value that will be assigned

Returns:

False if the table key already exists with a different type

putNumberArray(key: str, value: List[float]) → bool

Put a number array in the table

Parameters:

key – the key to be assigned to
value – the value that will be assigned

Returns:

False if the table key already exists with a different type

putRaw(key: str, value: buffer) → bool

Put a raw value (byte array) in the table

Parameters:

key – the key to be assigned to
value – the value that will be assigned

Returns:

False if the table key already exists with a different type

putString(key: str, value: str) → bool

Put a string in the table

Parameters:

key – the key to be assigned to
value – the value that will be assigned

Returns:

False if the table key already exists with a different type

putStringArray(key: str, value: List[str]) → bool

Put a string array in the table

Parameters:

key – the key to be assigned to
value – the value that will be assigned

Returns:

False if the table key already exists with a different type

putValue(*args, **kwargs)

Overloaded function.

putValue(self: ntcore._ntcore.NetworkTable, key: str, value: float) -> bool
putValue(self: ntcore._ntcore.NetworkTable, key: str, value: bool) -> bool
putValue(self: ntcore._ntcore.NetworkTable, key: str, value: bytes) -> bool
putValue(self: ntcore._ntcore.NetworkTable, key: str, value: str) -> bool
putValue(self: ntcore._ntcore.NetworkTable, key: str, value: sequence) -> bool

removeListener(listener: int) → None

Remove a listener.

Parameters:: listener – listener handle

setDefaultBoolean(key: str, defaultValue: bool) → bool

Gets the current value in the table, setting it if it does not exist.

Parameters:

key – the key
defaultValue – the default value to set if key doesn’t exist.

Returns:

False if the table key exists with a different type

setDefaultBooleanArray(key: str, defaultValue: List[int]) → bool

Gets the current value in the table, setting it if it does not exist.

Parameters:

key – the key
defaultValue – the default value to set if key doesn’t exist.

Returns:

False if the table key exists with a different type

setDefaultNumber(key: str, defaultValue: float) → bool

Gets the current value in the table, setting it if it does not exist.

Parameters:

key – the key
defaultValue – the default value to set if key doesn’t exist.

Returns:

False if the table key exists with a different type

setDefaultNumberArray(key: str, defaultValue: List[float]) → bool

Gets the current value in the table, setting it if it does not exist.

Parameters:

key – the key
defaultValue – the default value to set if key doesn’t exist.

Returns:

False if the table key exists with a different type

setDefaultRaw(key: str, defaultValue: buffer) → bool

Gets the current value in the table, setting it if it does not exist.

Parameters:

key – the key
defaultValue – the default value to set if key doesn’t exist.

Returns:

False if the table key exists with a different type

setDefaultString(key: str, defaultValue: str) → bool

Gets the current value in the table, setting it if it does not exist.

Parameters:

key – the key
defaultValue – the default value to set if key doesn’t exist.

Returns:

False if the table key exists with a different type

setDefaultStringArray(key: str, defaultValue: List[str]) → bool

Gets the current value in the table, setting it if it does not exist.

Parameters:

key – the key
defaultValue – the default value to set if key doesn’t exist.

Returns:

False if the table key exists with a different type

setDefaultValue(*args, **kwargs)

Overloaded function.

setDefaultValue(self: ntcore._ntcore.NetworkTable, key: str, value: float) -> bool
setDefaultValue(self: ntcore._ntcore.NetworkTable, key: str, value: bool) -> bool
setDefaultValue(self: ntcore._ntcore.NetworkTable, key: str, value: bytes) -> bool
setDefaultValue(self: ntcore._ntcore.NetworkTable, key: str, value: str) -> bool
setDefaultValue(self: ntcore._ntcore.NetworkTable, key: str, value: sequence) -> bool

setPersistent(key: str) → None

Makes a key’s value persistent through program restarts.

Parameters:: key – the key to make persistent