Go to Chapter 17 of A Smarter Way.
Return to our lists page:
http://introtopython.org/lists_tuples.html#Want-to-see-what-functions-are?
…and scroll down slightly because the page TOC is (again) broken.
Taking a slice from a list:
friends = ['bill', 'jeff', 'jim', 'scott', 'joel'] # Grab the first three users in the list. first_three = friends[0:3] for friend in first_three: print(friend.title())
Now go to Chapter 18 of A Smarter Way.
Remove an item by position:
del friends[0]
Remove an item by value:
friends.remove('jeff')
Now go to Chapter 19 of A Smarter Way.
Popping an element:
This is a unique operation. Popping an item removes the top item from a list, and passes it to a variable or other operation:
first_friend = friends.pop(0)
Exercises
See http://www.asmarterwaytolearn.com/python/17.html,
http://www.asmarterwaytolearn.com/python/18.html and
http://www.asmarterwaytolearn.com/python/19.html
See http://introtopython.org/lists_tuples.html#Want-to-see-what-functions-are? … and scroll down slightly.
- Continue editing examples.py.
- Slice a range of items from your list.
- Delete one item by index.
- Delete one item by value.
- Pop a value from the list, put it into a
- Perform a test to see if an item is in your list.