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1
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""" |
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2
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Element None |
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3
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4
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A non-packable, non-unpackable item that can help facilitate with additional information about an object, |
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5
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pass extra references to a variable and potentially more |
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6
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7
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.. code-block:: python |
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8
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9
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ExampleMessage = Message('VarTest', [('x', 'B'), ('y', 'B')]) |
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10
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11
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CRCedMessage = Message('CRCedMessage', [ |
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12
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('data', ExampleMessage), # A data field that has the example message in it |
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13
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('extra_param', None), # The None Element |
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14
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('crc', 'I', my_crc32, ['data', 'extra_param']), # Crc the data, and give an error if we have something unexpected |
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15
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]) |
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16
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17
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""" |
|
18
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19
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from typing import Optional |
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20
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21
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from starstruct.element import register, Element |
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22
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from starstruct.modes import Mode |
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23
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24
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@register |
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25
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class ElementNone(Element): |
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26
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""" |
|
27
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Initialize a StarStruct element object. |
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28
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29
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:param field: The fields passed into the constructor of the element |
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30
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:param mode: The mode in which to pack the bytes |
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31
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:param alignment: Number of bytes to align to |
|
32
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""" |
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33
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def __init__(self, field: list, mode: Optional[Mode]=Mode.Native, alignment: Optional[int]=1): |
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34
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self.name = field[0] |
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35
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36
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self.update(mode=mode, alignment=alignment) |
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37
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38
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@staticmethod |
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39
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def valid(field: tuple) -> bool: |
|
40
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return len(field) == 2 \ |
|
41
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and isinstance(field[0], str) \ |
|
42
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and field[1] is None |
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43
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44
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def validate(self, msg): |
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45
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return True |
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46
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47
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def update(self, mode=None, alignment=None): |
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48
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if mode: |
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49
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self._mode = mode |
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50
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51
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if alignment: |
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52
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self._alignment = alignment |
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53
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return |
|
54
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55
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def pack(self, msg): |
|
56
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return b'' |
|
57
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58
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def unpack(self, msg, buf): |
|
59
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return (msg, buf) |
|
60
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61
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def make(self, msg): |
|
62
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return msg[self.name] |
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63
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sprout42 /
StarStruct
This can be caused by one of the following:
1. Missing Dependencies
This error could indicate a configuration issue of Pylint. Make sure that your libraries are available by adding the necessary commands.
2. Missing __init__.py files
This error could also result from missing
__init__.pyfiles in your module folders. Make sure that you place one file in each sub-folder.