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nested lists

Handle many levels of nested lists

The data and your code are not in sync.
The movie buff’s data is a list that contains a nested list that itself contains
a nested list. The trouble is that your code knows only how to process a list
nested inside an enclosing list.
The solution, of course, is to add more code to handle the additionally nested list. By
looking at the existing code, it’s easy to spot the code you need to repeat:

for each_item in movies:
if isinstance(each_item, list):
This code for nested_item in each_item:
processes a
nested list. print(nested_item)
else:
print(each_item)

Here’s where the
repeated code needs
The next to go.
iteration of your
code looks like
this.

for each_item in movies:
if isinstance(each_item, list):
The repeated code
for nested_item in each_item:
replaces the “print()”
if isinstance(nested_item, list): statement and introduces
Note: in this
code, each for deeper_item in nested_item: another target identifier

“if” needs an print(deeper_item) called “deeper_item”.

associated else:

“else”.
print(nested_item)
else:
print(each_item)

24 Chapter 1