add multiple columns to dataframe if not exist pandas

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Charline
25 Oct 2016
1cols = ['B','C','D']
2
3df = df.reindex(df.columns.union(cols, sort=False), axis=1, fill_value=0)
4print (df)
5   A  B  C  D
60  1  2  3  0
71  4  4  5  0
82  1  2  3  0
93  4  4  6  0
10
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