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Python Python Collections (Retired) Lists Redux Manipulating Lists

travis ueki
travis ueki
2,102 Points
Posted by travis ueki
travis ueki
2,102 Points

Given a list of [a, b, c, d] How can you use .pop() to remove a c and .insert() to place at 0 index in one line of code

The directions say that this can be accomplished in one step. Does anyone have example code to demonstrate this?

lists.py 
the_list = ["a", 2, 3, 1, False, [1, 2, 3]]

# Your code goes below here
def new_list():
  x = the_list.pop(3) 
  the_list.insert(1, 0)
new_list()
>
# Update
> - I got the following to work, however, it feels hacky..

the_list = ["a", 2, 3, 1, False, [1, 2, 3]]

# Your code goes below here
newItem = the_list.pop(3)
the_list.insert(0, newItem)

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

You have the code, now combine the lines:

newItem = the_list.pop(3)
the_list.insert(0, newItem)

# becomes
the_list.insert(0, the_list.pop(3))
travis ueki
travis ueki
2,102 Points
travis ueki
travis ueki
2,102 Points

I didn't even think of that! I love python :)...

Much thanks Chris Freeman