VLBIFileReaderInfo¶
-
class
baseband.vlbi_base.file_info.
VLBIFileReaderInfo
[source] [edit on github]¶ Bases:
baseband.vlbi_base.file_info.VLBIInfoBase
Standardized information on file readers.
The
info
descriptor has a number of standard attributes, which are determined from arguments passed in opening the file, from the first header (info.header0
) and from possibly scanning the file to determine the duration of frames.Examples
The most common use is simply to print information:
>>> from baseband.data import SAMPLE_MARK5B >>> from baseband import mark5b >>> fh = mark5b.open(SAMPLE_MARK5B, 'rb') >>> fh.info File information: format = mark5b frame_rate = 6400.0 Hz bps = 2 complex_data = False readable = False missing: nchan: needed to determine sample shape and rate. kday, ref_time: needed to infer full times. errors: start_time: unsupported operand type(s) for +: 'NoneType' and 'int' frame0: In order to read frames, the file handle should be initialized with nchan set. >>> fh.close() >>> fh = mark5b.open(SAMPLE_MARK5B, 'rb', kday=56000, nchan=8) >>> fh.info File information: format = mark5b frame_rate = 6400.0 Hz sample_rate = 32.0 MHz samples_per_frame = 5000 sample_shape = (8,) bps = 2 complex_data = False start_time = 2014-06-13T05:30:01.000000000 readable = True >>> fh.close()
- Attributes
- formatstr or
None
File format, or
None
if the underlying file cannot be parsed.- frame_rate
Quantity
Number of data frames per unit of time.
- sample_rate
Quantity
Complete samples per unit of time.
- samples_per_frameint
Number of complete samples in each frame.
- sample_shapetuple
Dimensions of each complete sample (e.g.,
(nchan,)
).- bpsint
Number of bits used to encode each elementary sample.
- complex_databool
Whether the data are complex.
- start_time
Time
Time of the first complete sample.
- readablebool
Whether the first sample could be read and decoded.
- missingdict
Entries are keyed by names of arguments that should be passed to the file reader to obtain full information. The associated entries explain why these arguments are needed.
- errorsdict
Any exceptions raised while trying to determine attributes. Keyed by the attributes.
- formatstr or
Attributes Summary
Methods Summary
__call__
(self)Create a dict with file information, including missing pieces.
Attributes Documentation
-
attr_names
= ('format', 'frame_rate', 'sample_rate', 'samples_per_frame', 'sample_shape', 'bps', 'complex_data', 'start_time', 'readable')¶
-
bps
= None¶
-
complex_data
= None¶
-
format
= None¶
-
frame_rate
= None¶
-
readable
= None¶
-
sample_rate
= None¶
-
sample_shape
= None¶
-
samples_per_frame
= None¶
-
start_time
= None¶
Methods Documentation
-
__call__
(self) [edit on github]¶ Create a dict with file information, including missing pieces.