Lists: Difference between revisions
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== Creating a list == | == Creating a list == | ||
<syntaxhighlight lang=" | <syntaxhighlight lang="python3"> | ||
# The code below creates a list named polishAnimals | |||
polishAnimals = ['Bison', 'Moose', 'Deer', 'Lynx', 'Wolf', 'Beaver', 'Otter'] | |||
</syntaxhighlight> | |||
polishAnimals | == accessing a list == | ||
<syntaxhighlight lang="python3"> | |||
# If you want to print a list (kind of ugly) you can simply: | |||
print(polishAnimals) | |||
# However, it is far more common to slice into a list | |||
print(polishAnimals[2]) | |||
</syntaxhighlight> | </syntaxhighlight> | ||
== inserting into a list == | == inserting into a list == | ||
== deleting a list or deleting an element from a list == | == deleting a list or deleting an element from a list == | ||
Revision as of 06:31, 7 August 2017
Programming basics[1]
A list is a data structure in Python that is a mutable, or changeable, ordered sequence of elements. Each element or value that is inside of a list is called an item. Just as strings are defined as characters between quotes, lists are defined by having values between square brackets [ ].[2]
Please be careful as lists can be thought of as analogous to arrays, but they aren't the same thing. Arrays traditionally have a fixed memory size whilst lists have dynamic memory allocation. When you are working in Python, call a list a list. When you are working in PHP or Javascript, call an array an array. When you are working in C, call for help!
Creating a list[edit]
# The code below creates a list named polishAnimals
polishAnimals = ['Bison', 'Moose', 'Deer', 'Lynx', 'Wolf', 'Beaver', 'Otter']
accessing a list[edit]
# If you want to print a list (kind of ugly) you can simply:
print(polishAnimals)
# However, it is far more common to slice into a list
print(polishAnimals[2])
inserting into a list[edit]
deleting a list or deleting an element from a list[edit]
finding an element in a list[edit]
sorting a list[edit]
Do you understand this?[edit]
Standards[edit]
- Construct algorithms using pre- defined sub-programmes, one- dimensional arrays and/or collections.