2. Advanced Operations on Built-In Data Structures

Activity 2.01: Permutation, Iterator, Lambda, and List

Solution:

These are the detailed steps to solve this activity:

1. Look up the definition of permutations and dropwhile from itertools. There is a way to look up the definition of a function inside Jupyter itself. Just type the function name, followed by ?, and press Shift + Enter:

   from itertools import permutations, dropwhile
   permutations?
   dropwhile?

   You will see a long list of definitions after each ?. We will skip it here.

2. Write an expression to generate all the possible three-digit numbers using 1, 2, and 3:

   permutations(range(3)) 

   The output (which will vary in your case) is as follows:

   <itertools.permutations at 0x7f6c6c077af0>

3. Loop over the iterator expression you generated before. Use the print method to print each element returned by the iterator. Use assert and isinstance to make sure that the elements are tuples:

   for number_tuple in permutations(range...