Can't use attributes on Python callable objects in queries

[jmao-denver]

from deephaven import read_csv

# read_csv will accept a url or a path to a local file
seattle_weather = read_csv("https://media.githubusercontent.com/media/deephaven/examples/main/GSOD/csv/seattle.csv")

from deephaven.time import year, TimeZone
from deephaven import agg

TZ_NY = TimeZone.NY
hi_lo_by_year = seattle_weather.view(formulas=["Year = (int)year(ObservationDate, TimeZone.NY)", "TemperatureF"])\
    .where(filters=["Year >= 2000"])\
    .agg_by([\
        agg.avg(cols=["Avg_Temp = TemperatureF"]),\
        agg.min_(cols=["Lo_Temp = TemperatureF"]),\
        agg.max_(cols=["Hi_Temp = TemperatureF"])
        ],\
     by=["Year"])

Running the above code causes an exception

Having trouble with the following expression:
Full expression           : (int)year(ObservationDate, TimeZone.NY)
Expression having trouble : io.deephaven.engine.table.impl.lang.QueryLanguageParser$VisitArgs@43adc7c1
Exception message         : Cannot resolve field name.
    Expression : TimeZone.NY
    Scope      : TimeZone
    Scope Type : io.deephaven.engine.util.PyCallableWrapper
    Field Name : NY

The workaround is to assign the class attribute to a local variable first (TZ_NY in the code) and replace TimeZone.NY with it in the query string, but it is not natural and confusing to the users.