EGR 103/Fall 2018/Sandbox

• Note the differences between the following ways of adding to a list:

as_letters = ['hello']
as_letters += 'there'

creates

['hello', 't', 'h', 'e', 'r', 'e']

while

as_word = ['hello']
as_word += ['there']

creates

['hello', 'there']

• np.where(BOOLEAN) returns a tuple; to get to the actual indices, you need np.where(BOOLEAN)[0]. If you specifically only want the first place something is try in the BOOLEAN, use you need np.where(BOOLEAN)[0][0].