python – Delete a column from a Pandas DataFrame

python – Delete a column from a Pandas DataFrame

The best way to do this in Pandas is to use drop:

df = df.drop(column_name, 1)

where 1 is the axis number (0 for rows and 1 for columns.)

To delete the column without having to reassign df you can do:

df.drop(column_name, axis=1, inplace=True)

Finally, to drop by column number instead of by column label, try this to delete, e.g. the 1st, 2nd and 4th columns:

df = df.drop(df.columns[[0, 1, 3]], axis=1)  # df.columns is zero-based pd.Index

Also working with text syntax for the columns:

df.drop([column_nameA, column_nameB], axis=1, inplace=True)

Note: Introduced in v0.21.0 (October 27, 2017), the drop() method accepts index/columns keywords as an alternative to specifying the axis.

So we can now just do:

df = df.drop(columns=[column_nameA, column_nameB])

As youve guessed, the right syntax is

del df[column_name]

Its difficult to make del df.column_name work simply as the result of syntactic limitations in Python. del df[name] gets translated to df.__delitem__(name) under the covers by Python.

python – Delete a column from a Pandas DataFrame

Use:

columns = [Col1, Col2, ...]
df.drop(columns, inplace=True, axis=1)

This will delete one or more columns in-place. Note that inplace=True was added in pandas v0.13 and wont work on older versions. Youd have to assign the result back in that case:

df = df.drop(columns, axis=1)