python remove or delete last column of a dataframe

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description: python remove last column

init data

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import pandas 
data = pandas.DataFrame({
    'a': [1, 2, 3], 
    'b': [0.1, 0.2, 0.3], 
    'c': ['a', 'b', 'a'], 
    'd': [1, 2, 3]
    })
# data
#    a    b  c  d
# 0  1  0.1  a  1
# 1  2  0.2  b  2
# 2  3  0.3  a  3

drop last column

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data[data.columns[:-1]]

output

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   a    b  c
0  1  0.1  a
1  2  0.2  b
2  3  0.3  a