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4 4 # V P 4 ' d V # \ V 4 # \ d: \ P ! RT P P , R, 4 hi ; i)a= Convert object to seekable byte-stream.
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substrate: :py:class:`bytes` or :py:class:`io.IOBase` or :py:class:`univ.OctetString`
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Stream to check
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substrate: :py:class:`IOBase`
Stream to read from.
size: :py:class:`int`
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Parameters
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substrate: :py:class:`IOBase`
Stream to read from.
Keyword parameters
------------------
size: :py:class:`int`
How many bytes to read (-1 = all available)
context: :py:class:`dict`
Opaque caller context will be attached to exception objects created
by this function.
Yields
------
: :py:class:`bytes` or :py:class:`str` or :py:class:`SubstrateUnderrunError`
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Raises
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: :py:class:`~pyasn1.error.EndOfStreamError`
Input stream is exhausted
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