simple python question, while adopting current.inc

[Vetti52]

After upgrading to Weewx version 4.2.0 I want to replace the deprecated type Beaufort by the new unit  $current.windSpeed.beaufort.

First, I replaced the previous evaluation in my accomodated current.inc, where I want to express the beaufort value by a literal description:

#if $varExists('day.windSpeed') and $current.windSpeed.raw is not None
  #if $current.windSpeed.beaufort == '0'
    #set $word_current_beaufort = 'Calm'
  #elif $current.windSpeed.beaufort == '1'
    #set $word_current_beaufort = 'Light Air'

...

  #else
    #set $word_current_beaufort = 'N/A'
  #end if
 

This construct does not result in errors, but always ends up displaying "N/A".

As gust seems not to be covered by the new unit $current.windSpeed.beaufort, I evaluate gust into beaufort still the old way, which is an adoption from another contribution in this forum. This works well:

  #if $unit.unit_type.windSpeed == 'mile_per_hour'
    #set $current_gust_kts = $current.windGust.raw * 0.8689762
  #elif $unit.unit_type.windSpeed == 'km_per_hour'
    #set $current_gust_kts = $current.windGust.raw * 0.539956
  #elif $unit.unit_type.windSpeed == 'meter_per_second'
    #set $current_gust_kts = $current.windGust.raw * 1.943844
  #elif $unit.unit_type.windSpeed == 'knot'
    #set $current_gust_kts = $current.windGust.raw
  #else
    #set $current_gust_kts = 0
  #end if
  #if $current_gust_kts < 1
    #set $current_gust_beaufort = 0
  #elif $current_gust_kts < 4
    #set $current_gust_beaufort = 1
 ...

  #else
    #set $current_gust_beaufort = 12
  #end if
#else
  #set $current_gust_beaufort = 'N/A'
#end if

As I am pretty naive with python, I do not understand, what is wrong with my solution. Python experts may lough about it. But, please, explain, how to solve my problem.

Thanks!

[Tom Keffer]

Your main problem is that $current.windSpeed.beaufort returns a number, not a string. So, you want

#if $varExists('day.windSpeed') and $current.windSpeed.raw is not None
  #if $current.windSpeed.beaufort == 0
    #set $word_current_beaufort = 'Calm'
  #elif $current.windSpeed.beaufort == 1
    #set $word_current_beaufort = 'Light Air'

...

  #else
    #set $word_current_beaufort = 'N/A'
  #end if

You should be able to do $current.windGust.beaufort as well. However, oceanographically, Beaufort's observations are related to the steady wind speed, not gusts, so the results cannot be related to sea state through his table.

-tk

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[Vetti52]

I tried the integer version already, with the same result. So, I assumed, that Beaufort is a string. Still no success.

At least current.windGust.beaufort works fine!

Thanks for the hint.

Showing wind gust is just to compare the values to the red line in the windspeed/gust graph. When sailing, I am accustomed to trust on the waves, not on the wind meter.

[Tom Keffer]

Silly me. You need a .raw suffix:

#if $varExists('day.windSpeed') and $current.windSpeed.raw is not None

  #if $current.windSpeed.beaufort.raw == 0
    #set $word_current_beaufort = 'Calm'
  #elif $current.windSpeed.beaufort.raw == 1

    #set $word_current_beaufort = 'Light Air

'

...

  #else
    #set $word_current_beaufort = 'N/A'
  #end if

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[Vetti52]

Right! That works nicely.

Well, I could have realized it. But perfect, that there is somone, that understands, what I have written.

Thanks a lot!