async branch is not compatible with python 3.7

[cbergmiller]

async is a not allowed in Python 3.7 module paths.

Versions

• Python: 3.7
• OS: Windows
• Pymodbus: async branch

Description

The async branch can not be used with Python 3.7
A solution would be to rename pymodbus.client.async with pymodbus.client.aio or pymodbus.client.asynchronous.

I can create a PR if desired.

Code and Logs

  File "async_asyncio_client.py", line 18
    from pymodbus.client.async.tcp import AsyncModbusTCPClient as ModbusClient
                             ^
SyntaxError: invalid syntax

[dhoomakethu]

@cbergmiller thanks for bringing this to notice, do you have any more hints on why this is happening ? Is async a reserved keyword starting with 3.7 ?

[cbergmiller]

@dhoomakethu yes async and await are reserved keywords since 3.7:
https://docs.python.org/3/whatsnew/3.7.html

[dhoomakethu]

@cbergmiller Appreciate if you can raise a PR . Thanks.

[cbergmiller]

It would be great if Python 3.7 could be added to the Travis CI test environments.

[jessekerkhoven]

Any update on merging dev3.7 branch in to master for a new release? See also #346

[dhoomakethu]

@jessekerkhoven apologies for the delay, I am yet to do a code review . Will try to complete this asap.

[dhoomakethu]

For any one wanting support on python 3.7, please give a try on branch pymodbus-2.2.0

[dhoomakethu]

Fixed and available as part of v2.2.0rc1.
pip install pymodbus==2.2.0rc1