Once you start a new IPython or Jupyter session, you can import the NumPy module and verify its version as follows:
In [1]: import numpy
In [2]: numpy.__version__
Out[2]: '1.15.4'
Recall that in the Jupyter Notebook, you can hit Ctrl + Enter to execute a cell once you have typed the command. Alternatively, Shift + Enter executes the cell and automatically inserts or selects the cell below it. Check out all of the keyboard shortcuts by clicking on Help | Keyboard Shortcut or take a quick tour by clicking on Help | User Interface Tour.
For the parts of the package discussed here, I would recommend using NumPy version 1.8 or later. By convention, you'll find that most people in the scientific Python world will import NumPy using np as an alias:
In [3]: import numpy as np
In [4]: np.__version__
Out[4]: '1.15.4'
Throughout this chapter and the rest of this book, we will stick to the same convention.