Informatics Practices

Write code statements for a dataframe df for the following :
(a) delete an existing column from it.
(b) delete rows from 3 to 6 from it.
(c) Check if the dataframe has any missing values.
(d) fill all missing values with 999 in it.

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(a)

>>> del df[<column_name>]

(b)

>>> df.drop(range(2, 6))

(c)

>>> df.isnull()

(d)

>>> df.fillna(999)

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