Pydeck_chart not showing points

Using Streamlit
1

I am trying to plot some latitude/longitude locations as points on a map using pydeck_chart but it’s not working. There are no errors. The map shows up fine, but the points aren’t plotted.
This is my code:

import pandas as pd
import streamlit as st
import pydeck as pdk

df = pd.DataFrame(data=[[44.0578, -80.3267], [44.0596, -80.3296], [44.0613, -80.3324], [44.0625, -80.3346]], columns=['latitude', 'longitude'])

view_state = pdk.ViewState(latitude=44.057, longitude=-80.325, zoom=10)
layer = pdk.Layer(
    'ScatterplotLayer',
    data=df,
    get_position=['latitude', 'longitude'],
    get_radius=50,  
    pickable=True,
    filled=True
)

st.pydeck_chart(pdk.Deck(
    map_style="mapbox://styles/mapbox/light-v9",
    layers=[layer],
    initial_view_state=view_state,
))

Using streamlit version 0.82.0
What could be wrong?

EDIT: I figured it out. The order of strings in get_position matters: must place longitude before latitude.
On that note, I’m wondering why is it like that? If they’re strings in a list, can we just extract the corresponding column from the passed in data by string value?