Python, numpy, matplotlib

Question 1

At the top of the matplotlib hierarchy is the _____ which is provided by the _____ module. At this level, functions are used to add lines, images, text, etc. to the current axes in the current figure.

Answer 1

state-machine environment; matplotlib.pyplot

Question 2

Pyplot’s state-machine environment provides an environment that closely emulates which commercial software package?

Answer 2

MATLAB

Question 3

Matplotlib is the whole package; ____ is a module in matplotlib; and ____ is a “convenience module” that gets installed alongside matplotlib designed to mimic the MATLAB environment (but is no longer recommended).

Answer 3

matplotlib.pyplot; pylab

Question 4

____ is a convenience module that bulk-imports matplotlib.pyplot and numpy into a single namespace. Although many examples use ____, it is no longer recommended.

Answer 4

pylab

Question 5

You can turn a Python list comprehension into a generator expression simply by replacing ____ with ____.

Answer 5

…by replacing square brackets, [ ], with parentheses, ().

Question 6

You can think of a Python list comprehension as a ____ wrapped in a list constructor.

Answer 6

generator expression

Question 7

The performance improvement from the use of generators is the result of _____, which translates to lower memory usage.

Answer 7

lazy (on demand) generation of values

Question 8

How do you (and the Python interpreter) recognize that a function definition is actually a generator?

Answer 8

Both functions and generators use the “def” keyword. But functions “return” values, whereas generators “yield” values.

Question 9

Generator functions create _____.

Answer 9

generator iterators, AKA generators

Question 10

In Python, ______ create generator iterators, usually called just “generators.”

Answer 10

Generator functions (i.e., a def that uses “yield” instead of “return”)