Type Checking #

These functions are predicates to check whether a DataType instance represents a given data type (such as int32 ) or general category (such as “is a signed integer”).

is_boolean (t)

Return True if value is an instance of type: boolean.

is_integer (t)

Return True if value is an instance of type: any integer.

is_signed_integer (t)

Return True if value is an instance of type: signed integer.

is_unsigned_integer (t)

Return True if value is an instance of type: unsigned integer.

is_int8 (t)

Return True if value is an instance of type: int8.

is_int16 (t)

Return True if value is an instance of type: int16.

is_int32 (t)

Return True if value is an instance of type: int32.

is_int64 (t)

Return True if value is an instance of type: int64.

is_uint8 (t)

Return True if value is an instance of type: uint8.

is_uint16 (t)

Return True if value is an instance of type: uint16.

is_uint32 (t)

Return True if value is an instance of type: uint32.

is_uint64 (t)

Return True if value is an instance of type: uint64.

is_floating (t)

Return True if value is an instance of type: floating point numeric.

is_float16 (t)

Return True if value is an instance of type: float16 (half-precision).

is_float32 (t)

Return True if value is an instance of type: float32 (single precision).

is_float64 (t)

Return True if value is an instance of type: float64 (double precision).

is_decimal (t)

Return True if value is an instance of type: decimal.

is_decimal128 (t)

Return True if value is an instance of type: decimal128.

is_decimal256 (t)

Return True if value is an instance of type: decimal256.

is_list (t)

Return True if value is an instance of type: list.

is_large_list (t)

Return True if value is an instance of type: large list.

is_fixed_size_list (t)

Return True if value is an instance of type: fixed size list.

is_list_view (t)

Return True if value is an instance of type: list view.

is_large_list_view (t)

Return True if value is an instance of type: large list view.

is_struct (t)

Return True if value is an instance of type: struct.

is_union (t)

Return True if value is an instance of type: union.

is_nested (t)

Return True if value is an instance of type: nested type.

is_run_end_encoded (t)

Return True if value is an instance of type: run-end encoded.

is_temporal (t)

Return True if value is an instance of type: date, time, timestamp or duration.

is_timestamp (t)

Return True if value is an instance of type: timestamp.

is_date (t)

Return True if value is an instance of type: date.

is_date32 (t)

Return True if value is an instance of type: date32 (days).

is_date64 (t)

Return True if value is an instance of type: date64 (milliseconds).

is_time (t)

Return True if value is an instance of type: time.

is_time32 (t)

Return True if value is an instance of type: time32.

is_time64 (t)

Return True if value is an instance of type: time64.

is_duration (t)

Return True if value is an instance of type: duration.

is_interval (t)

Return True if value is an instance of type: interval.

is_null (t)

Return True if value is an instance of type: null.

is_binary (t)

Return True if value is an instance of type: variable-length binary.

is_unicode (t)

Alias for is_string.

is_string (t)

Return True if value is an instance of type: string (utf8 unicode).

is_large_binary (t)

Return True if value is an instance of type: large variable-length binary.

is_large_unicode (t)

Alias for is_large_string.

is_large_string (t)

Return True if value is an instance of type: large string (utf8 unicode).

is_binary_view (t)

Return True if value is an instance of type: variable-length binary view.

is_string_view (t)

Return True if value is an instance of type: variable-length string (utf-8) view.

is_fixed_size_binary (t)

Return True if value is an instance of type: fixed size binary.

is_map (t)

Return True if value is an instance of type: map.

is_dictionary (t)

Return True if value is an instance of type: dictionary-encoded.

is_primitive (t)

Return True if value is an instance of type: primitive type.