pydeck: Layers fail on data columns names with hyphens or whitespace

The code sample below fails because of lng-new, which the JS expression parser in @deck.gl/json treats as datum.lng - datum.new.

import pydeck as pdk
import pandas as pd

UK_ACCIDENTS_DATA = 'https://raw.githubusercontent.com/visgl/deck.gl-data/master/examples/3d-heatmap/heatmap-data.csv'
df = pd.read_csv(UK_ACCIDENTS_DATA)
df['lng-new'] = df['lng']
df.head()

layer = pdk.Layer(
    'HexagonLayer',
    UK_ACCIDENTS_DATA,
    get_position=['lng-new', 'lat'],
    auto_highlight=True,
    elevation_scale=50,
    pickable=True,
    elevation_range=[0, 3000],
    extruded=True,                 
    coverage=1)

# Set the viewport location
view_state = pdk.ViewState(
    longitude=-1.415,
    latitude=52.2323,
    zoom=6,
    min_zoom=5,
    max_zoom=15,
    pitch=40.5,
    bearing=-27.36)

# Combined all of it and render a viewport
r = pdk.Deck(layers=[layer], initial_view_state=view_state)
r.show()

It's possible that pydeck should sanitize column names in a data frame before passing them to @deck.gl/json or warn if a column name contains a JS arithmetic operator or whitespace. Alternately it could make sense to change this behavior within @deck.gl/json.

Reproduce the sample with the lng-new column, then trace how pydeck passes layer accessors to the @deck.gl/json expression parser. Compare whether handling belongs in pydeck or @deck.gl/json; done should define and verify behavior for hyphens, whitespace, and other JavaScript operators.