Parse_angle only takes single str or list

[zbruick]

In trying to use metpy.calc.parse_angle with some Mesonet data, I came across the issue that anything other than a single string or a list cannot be passed in, even though it says "array-like". Theoretically this should accept an array or pandas.Series easily.

Looking at the code, it's obvious why this breaks, as the only two types explicitly allowed are strings and lists.

import pandas as pd
import metpy.calc as mpcalc

data = pd.read_csv('../Downloads/current.csv.txt', na_values=' ')
data = data.dropna(subset=['TAIR', 'TDEW', 'WDIR', 'WSPD'])
wind_direction = data['WDIR']
# Works
mpcalc.parse_angle(list(wind_direction))
# Doesn't work
mpcalc.parse_angle(wind_direction)

• python: 3.7.3
• metpy: master