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+--- Thread: .loc with Booleans (/thread-29302.html)
.loc with Booleans - Mark17 - Aug-27-2020
Can someone explain the mechanism of this output?
df = pd.DataFrame([[1, 2], [4, 5], [7, 8]],
index=['cobra', 'viper', 'sidewinder'],
columns=['max_speed', 'shield'])
>>> df.loc[[False,False,True]]
max_speed shield
sidewinder 7 8
RE: .loc with Booleans - snippsat - Aug-27-2020
pandas.DataFrame.loc
loc doc Wrote:.loc[] is primarily label based, but may also be used with a boolean array.So if
True(a boolan) is in the list it will get that row or rows.import pandas as pd
df = pd.DataFrame([[1, 2], [4, 5], [7, 8]],
index=['cobra', 'viper', 'sidewinder'],
columns=['max_speed', 'shield'])
>>> df
max_speed shield
cobra 1 2
viper 4 5
sidewinder 7 8
>>> df.loc[[False, True, True]]
max_speed shield
viper 4 5
sidewinder 7 8
>>> # Same as
>>> df.loc[['viper', 'sidewinder']]
max_speed shield
viper 4 5
sidewinder 7 8