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c955820521
* Use setuptools to allow the extras_require to work in python3.6 This also declares some hidden dependencies for the underlying connection protocols, but note that they are normally reliant on system-packaged versions, which is a bit less than optimal. * In message, on assert of incoming type, note failing type * In utilities, guard against truncated input. * In demo allow for specifying different connections and demos on command line Also addresses a crash in led demo where parameters x and y were not provided to an empty lamba that was passed in. * Remove commentted line, apply black formatting * Raise TypeError when an incorrectly-typed message is received * Apply black automatic formatting to the utilities module
51 lines
1.2 KiB
Python
51 lines
1.2 KiB
Python
"""
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This module offers some utilities, in a way they are work in both Python 2 and 3
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"""
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import binascii
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import logging
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import sys
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from struct import unpack
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log = logging.getLogger(__name__)
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if sys.version_info[0] == 2:
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import Queue as queue
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else:
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import queue as queue
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queue = queue # just to use it
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def check_unpack(seq, index, pattern, size):
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"""Check that we got size bytes, if so, unpack using pattern"""
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data = seq[index : index + size]
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if len(data) == size:
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return unpack(pattern, data)[0]
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else:
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log.warning(
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"Unpacking of %s bytes failed, insufficient data: %r", size, seq[index:]
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)
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raise ValueError(data, "Expected %s bytes" % (size,))
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def usbyte(seq, index):
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return check_unpack(seq, index, "<B", 1)
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def ushort(seq, index):
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return check_unpack(seq, index, "<H", 2)
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def usint(seq, index):
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return check_unpack(seq, index, "<I", 4)
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def str2hex(data): # we need it for python 2+3 compatibility
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# if sys.version_info[0] == 3:
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# data = bytes(data, 'ascii')
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if not isinstance(data, (bytes, bytearray)):
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data = bytes(data, "ascii")
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hexed = binascii.hexlify(data)
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return hexed
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