Source code for baseband.dada.frame

# Licensed under the GPLv3 - see LICENSE
from ..base.frame import FrameBase
from .header import DADAHeader
from .payload import DADAPayload

__all__ = ['DADAFrame']

[docs]class DADAFrame(FrameBase): """Representation of a DADA file, consisting of a header and payload. Parameters ---------- header : `~baseband.dada.DADAHeader` Wrapper around the header lines, providing access to the values. payload : `~baseband.dada.DADAPayload` Wrapper around the payload, provding mechanisms to decode it. valid : bool, optional Whether the data are valid. Default: `True`. verify : bool, optional Whether to do basic verification of integrity. Default: `True`. Notes ----- DADA files do not support storing whether data are valid or not on disk. Hence, this has to be determined independently. If ``valid=False``, any decoded data are set to ``cls.fill_value`` (by default, 0). The Frame can also be instantiated using class methods: fromfile : read header and map or read payload from a filehandle fromdata : encode data as payload Of course, one can also do the opposite: tofile : method to write header and payload to filehandle data : property that yields full decoded payload One can decode part of the payload by indexing or slicing the frame. A number of properties are defined: `shape`, `dtype` and `size` are the shape, type and number of complete samples of the data array, and `nbytes` the frame size in bytes. Furthermore, the frame acts as a dictionary, with keys those of the header. Any attribute that is not defined on the frame itself, such as ``.time`` will be looked up on the header as well. """ _header_class = DADAHeader _payload_class = DADAPayload