Python Exam 2 Conceptual Review Session

What method can be called on a list to add an item?

.append()

Which datatype is accessed with the .items() method?

dict

What characteristic means that elements can be changed in a datatype?

Mutable

Are tuples indexed?

YES

Which datatype is known to be ordered?

List

What method counts the occurrences of an item in a tuple?

.count(item)

What will myList[0] return if myList = [1,2,3]?

1

Are dictionary keys mutable?

NO

How do you access a value in a dictionary?

By using the key, e.g., myDict[key]

What method can be called on a string to remove whitespace?

.strip(chars)

What does the .split() method do in Python?

Splits a string into a list based on a separator.

What will be the return value of sorted() when a list is passed?

A sorted list without modifying the original.

How do you check if an item is in a list?

Using the 'in' keyword.

What is the primary way to add an item to a list?

.append()

What is the output of the statement myList.reverse()?

None; it modifies the original list.

What occurs if you attempt to call index on a value not found in a list?

An error is thrown.

Are dictionary values mutable?

YES

What does tuple unpacking allow you to do?

Assign variables to values directly from a tuple.

What will 'del myList[0]' do?

Delete the first element of myList.

What does the random module's .random() function return?

A random float between [0,1).

Which method returns the index of an item in a tuple?

.index(item)

What happens in tuple packing?

Values are packed into the tuple.

How are dictionaries used to count letter occurrences?

By incrementing the count for each letter in a looping structure.

What is the significance of using the import statement before a module?

It allows access to the functions and variables defined in that module.

What happens when you try to add duplicate keys to a dictionary?

Only the last assignment to the key will be kept.

What is unique about the elements in a dictionary?

Keys must be unique.

What is a key characteristic of lists in Python?

They are mutable.

What will myTuple[0] return if myTuple = (1,2,3)?

1

What does the range function return?

A sequence of numbers in a specified range.

To mutate items in a tuple, what must be done?

You must create a new tuple.

What is the purpose of the .replace() method in strings?

To return a new string with specified substrings replaced.

What are the characteristics of a dictionary?

Keys are unique and values can be mutable.

How to check if two items are identical?

Use '==' operator.