test_utm2.py

import numpy as np
import utm

starting_lat = -16.770190621116416
starting_lon = 145.94309647258999

x, y, zone, letter = utm.from_latlon(starting_lat, starting_lon)
# Scalar
print(starting_lat, starting_lon, x, y)
lat_scalar, lon_scalar = utm.to_latlon(x, y, zone, letter)
print(lat_scalar, lon_scalar, x, y)

x, y, zone, letter = utm.from_latlon(starting_lat, starting_lon)
# Using np.array()
x = np.array(x)  # np.ones(3) * x
y = np.array(y)  # np.ones(3) * y
print(starting_lat, starting_lon, x, y)
lat_vector, lon_vector = utm.to_latlon(x, y, zone, letter)
print(lat_vector, lon_vector, x, y)