python - How to check if the signs of a Series conform to a given string of signs? -



python - How to check if the signs of a Series conform to a given string of signs? -

for illustration have series below,

ts = pd.series([-1,-2.4,5,6,7, -4, -8])

i know if there pythonic way check signs of ts against list of signs, such as,

sign = '++++---' # returns false

while

sign = '--+++--' # returns true

this solution requires numpy functions, since using pandas info series, not issue you.

import pandas pd import numpy np values = pd.series([-1, -2.4, 5, 6, 7, -4, -8, 0]) sign_str = "--+++--0" sign_map = { "+" : 1, "0" : 0, "-" : -1 } expected_signs = list(map(sign_map.get, sign_str)) observed_signs = np.sign(values) np.all(expected_signs == observed_signs)

python pandas series

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