FreeOpcUa /
opcua-asyncio
| Conditions | 3 |
| Total Lines | 52 |
| Code Lines | 19 |
| Lines | 0 |
| Ratio | 0 % |
| Changes | 0 | ||
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
| 1 | ''' |
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| 16 | async def main(): |
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| 17 | # setup our server |
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| 18 | server = Server() |
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| 19 | await server.init() |
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| 20 | server.set_endpoint("opc.tcp://0.0.0.0:4840/freeopcua/server/") |
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| 21 | |||
| 22 | # setup our own namespace, not really necessary but should as spec |
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| 23 | uri = "http://examples.freeopcua.github.io" |
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| 24 | nsidx = await server.register_namespace(uri) |
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| 25 | |||
| 26 | # -------------------------------------------------------- |
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| 27 | # create custom enum data type |
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| 28 | # -------------------------------------------------------- |
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| 29 | |||
| 30 | # 1. |
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| 31 | # Create Enum Type |
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| 32 | myenum_type = await server.nodes.enum_data_type.add_data_type(nsidx, 'MyEnum') |
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| 33 | |||
| 34 | # 2. |
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| 35 | # Add enumerations as EnumStrings (Not yet tested with EnumValues) |
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| 36 | # Essential to use namespace 0 for EnumStrings ! |
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| 37 | |||
| 38 | es = await myenum_type.add_variable(0, "EnumStrings", [ |
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| 39 | ua.LocalizedText("ok"), |
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| 40 | ua.LocalizedText("idle"), |
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| 41 | ]) |
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| 42 | |||
| 43 | # 3. load enums froms erver |
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| 44 | await server.load_enums() |
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| 45 | |||
| 46 | # now we have a python enum available to play with |
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| 47 | val = ua.MyEnum.ok |
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| 48 | |||
| 49 | # not sure these are necessary |
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| 50 | #es.write_value_rank(1) |
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| 51 | #es.write_array_dimensions([0]) |
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| 52 | |||
| 53 | # -------------------------------------------------------- |
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| 54 | # create object with enum variable |
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| 55 | # -------------------------------------------------------- |
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| 56 | |||
| 57 | # create object |
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| 58 | myobj = await server.nodes.objects.add_object(nsidx, 'MyObjectWithEnumVar') |
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| 59 | |||
| 60 | # add var with as type the custom enumeration |
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| 61 | myenum_var = await myobj.add_variable(nsidx, 'MyEnum2Var', val, datatype=myenum_type.nodeid) |
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| 62 | await myenum_var.set_writable() |
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| 63 | await myenum_var.write_value(ua.MyEnum.idle) # change value of enumeration |
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| 64 | |||
| 65 | async with server: |
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| 66 | while True: |
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| 67 | time.sleep(0.5) |
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| 68 | |||
| 72 |
