import numpy as np import pandas as pd vect1=np.zeros(10) vect2=np.ones(10) df=pd.DataFrame({'col1':vect1,'col2':vect2})

**Here is what the above code is Doing:**

1. Creating a vector of zeros and a vector of ones.

2. Creating a dataframe with two columns, col1 and col2, and assigning the vectors to them.

3. Creating a new column in the dataframe, col3, and assigning the sum of col1 and col2 to it.

4. Creating a new column in the dataframe, col4, and assigning the difference of col1 and col2 to it.

5. Creating a new column in the dataframe, col5, and assigning the product of col1 and col2 to it.

6. Creating a new column in the dataframe, col6, and assigning the ratio of col1 and col2 to it.