Interview Questions and Answers

Example:

df.groupby('Column').mean()

Example:

df['Column'].apply(lambda x: x*2)

Example:

pd.pivot_table(df, values='Value', index='Index', columns='Column', aggfunc=np.sum)

Example:

for index, row in df.iterrows(): print(index, row['Column'])

Example:

pd.melt(df, id_vars=['ID'], value_vars=['Var1', 'Var2'])

Example:

df.to_csv('output.csv', index=False)

Example:

pd.get_dummies(df['Category'])