Python Terms

Question 1

Int

Answer 1

Number without any decimal precision

Question 2

Float

Answer 2

Number with decimal precision

Question 3

Boolean

Answer 3

1 or 0. True or False

Question 4

Str

Answer 4

String. Text enclosed in quotes. Either ‘ or “

Question 5

Tuple

Answer 5

• Used to store multiple items in a single variable
• Mytupe = (‘apple’, ‘banana’, ‘cherry’)
• A tuple is a collection which is ordered and unchangeable
• Ex: coord1 = (-35, 50). We cannot do: coord1[0] = -36. We can’t change the value in position 1 of the tuple. We can only save over the like coord1 = (-36, 50)
• Unchangeable object means it is immutable object.
• Tuples are smaller in memory compared to other objects like list, set, etc.

Question 6

List

Answer 6

• Used to store multiple items in a single variable.
• Lists are ordered, changeable (mutable), and allow duplicate values.
• List items are indexed, the first item has index [0], the second is [1], etc.
• Ordered: items have a defined order and will not change. Adding new items to a list will be placed at the end of the list.
• We can change, add, and remove items after it has been created.
• Duplicates: Lists allow duplicate values.
• Coord1.append(100) will place 100 at the end of the list.
• Coord1.insert(2, 250) will insert the value 250 at index 2.
• Coord1[1:4] = show me values in list between indexes 1 and 3. #Note goes up to but does not include index 4.

Question 7

Set

Answer 7

• Used to store multiple items in a single variable.
• Set is a collection which is both unordered and unindexed and do not allow duplicate values.
• Written with curly brackets.
• Can convert to a set to get distinct values.
• Coord1.difference(coord2) – things in coord1 but not coord2
• Coord1.intersection(coord2) – things in both sets
• Coord1.union(coord2) – things in either set

Question 8

Dict

Answer 8

• Used to store data values in key: value pairs.
• It is orders, changeable and does not allow duplicates. They are written with curly brackets and have keys and values.
• Ex: dict = {‘brand’: ‘Ford’, ‘model’: ‘mustang’, ‘year’: 164}
• Dict[‘brand’] – this will look up the value for the key ‘brand’. This is how to slice in dictionaries.