fourth

# refactor to make more flexible, less hard to change
# add a new key with making changes throughout file

# Column names and column indices to read
columns = {'date':0, 'time':1, 'tempout':2}

# data types for each column
# float is a function pointer here, not a function
type = {'tempout': float}

# initialize data variable
# a dicionary, will populate later
# init each list to empty
data = {}
for column in columns:
    # empty list
    data[column] = []


filename = "data/wxobs20170821.txt"

with open(filename, 'r') as datafile:
# orig    data = datafile.read()
    # read the first 3 lines (header)
    #   v a place holder variable (instead of i, j ...) indicates we'll never use the variable
    for _ in range(3):
        # could have said 'for i in [0,3]'
        # print(_)
        datafile.readline()

    # Read and parse the rest of the file
    # each line is a string
    for line in datafile:
        # split along white space
        split_line = line.split()
        # add datum to the list 'data'
        for column in columns:
            i = columns[column]
            # there's only one of these
            t = type.get(column, str)
            value = t(split_line[i])
            data[column].append(value)

# Some kind debugging or what it would try to do
# d.get(key, str)
# d['key'] --- > str

print(data['tempout'])

# Debug
# print(data['tempout'])

# % git log --oneline