Python Definitions Worksheet: Data Structures (Modules 31–40)
Name:
Date:
Class:
✎
Key terms
Write what each term means, in your own words.
1
.upper()
2
.lower()
3
.replace(old, new)
4
.strip()
5
{}
6
.format()
7
f-string
8
{:.2f}
9
List
10
[]
11
Element
12
len(list)
13
list[0]
14
list[-1]
15
list[i] = value
16
IndexError
17
list[start:stop]
18
list[:stop]
19
list[start:]
20
list[::step]
21
.append(item)
22
.insert(index, item)
23
.remove(value)
24
.pop()
25
Dictionary
26
Key
27
Value
28
dict[key]
29
.keys()
30
.values()
31
.items()
32
.get(key, default)
33
for key in d:
34
for v in d.values():
35
for k, v in d.items():
36
'key' in d
37
Nested list
38
grid[row][col]
39
Inner list
40
Nested loop
Answer Key
Python · Modules 31–40 · Student wording will vary for definitions
1.upper() — Returns the string in all uppercase letters.
2.lower() — Returns the string in all lowercase letters.
3.replace(old, new) — Replaces all occurrences of old with new.
4.strip() — Removes whitespace from both ends of the string.
5{} — Placeholder in .format() that is replaced by the argument value.
6.format() — Method that fills {} placeholders in a string with values.
7f-string — f'...' lets you insert variables directly inside {curly braces}.
8{:.2f} — Format specifier that shows a number to 2 decimal places.
9List — An ordered collection of items in square brackets.
10[] — Creates an empty list.
11Element — An individual item inside a list.
12len(list) — Returns the number of elements in the list.
13list[0] — Access the first item in the list.
14list[-1] — Access the last item in the list.
15list[i] = value — Change the item at index i to a new value.
16IndexError — Error when the index is out of range.
17list[start:stop] — Get items from start up to but not including stop.
18list[:stop] — Get items from the beginning up to stop.
19list[start:] — Get items from start to the end of the list.
20list[::step] — Get every step-th item from the list.
21.append(item) — Adds an item to the end of the list.
22.insert(index, item) — Inserts an item at a specific position in the list.
23.remove(value) — Removes the first occurrence of a value from the list.
24.pop() — Removes and returns the last item, or the item at the given index.
25Dictionary — A collection of key-value pairs in curly braces {}.
26Key — The label used to look up a value in a dictionary.
27Value — The data stored under a key.
28dict[key] — Access the value associated with that key.
29.keys() — Returns all keys in the dictionary.
30.values() — Returns all values in the dictionary.
31.items() — Returns key-value pairs as tuples.
32.get(key, default) — Safely accesses a key and returns default if missing.
33for key in d: — Iterate through all keys in the dictionary.
34for v in d.values(): — Iterate through all values in the dictionary.
35for k, v in d.items(): — Iterate through key-value pairs with unpacking.
36'key' in d — Check if a key exists in the dictionary returning True or False.
37Nested list — A list that contains other lists as elements.
38grid[row][col] — Access an item using two indices: row then column.
39Inner list — A list that is an element of the outer list.
40Nested loop — A loop inside another loop used to access all items.