How to display a value with its format

Development Python
1

Hi,

Is there a function or method that formats a value into a string according to the format?

I get the value of an attribute in the following way.

>>> attr_proxy = tango.AttributeProxy("meteo/alarm/shm/WindSpeed")
>>> attr_proxy.read().value
2.7

The display format of the value is given as follows.

>>> attr_proxy.get_config().format
'%.2f'

I didn’t find in the documentation (PyTango API) a function that formats a string according to this format (to obtain “2.70” in this case). Of course I can code it, but I would like to use a Python API function.

Thank you for reading my request!

2

Hi JC

I don’t see anything like that in PyTango. Where do you think we should add it? A method on AttributeProxy? A general utility function? Please propose some options with the function/method signature, and expected behaviour.

Taurus has that kind of thing built in for GUIs, but it would be nice to have in PyTango as well.

Regards,
Anton

3

Hi Anton,

Thank you for your prompt response. I will code a solution and propose it in the GitLab project (pytango) if possible (?). Can I propose such a GitLab ticket in order to have a discussion and a follow-up?

I don’t see yet if this would be a feature in AttributeProxy or a general utility function.

It is also about capturing the wrong formatting according to the type of data…

Best regards,
Jean-Christophe.

4

Yes, please create an issue in the GitLab project with your proposal(s).

You may find some clues in the Taurus code. E.g., lib/taurus/core/tango/util/tango_taurus.py · 5.1.3 · taurus-org / taurus · GitLab

/Anton

5

Hi Anton,

I created the ticket Issue #480 (Format a value with the format string spectification).

In the meantime, for my own needs I have developed a very simple function that only takes the float format into account.

Best,
Jean-Christophe

6

Hi Jean-Christophe

Thanks, I saw your nicely detailed proposal. The PyTango developers are focused on the 9.4.0 release at the moment, but once that is done we can look into this proposal.

/Anton