Python Final
This string method returns a copy of the string with all leading whitespace characters removed. a. lstrip b. rstrip c. remove d. strip_leading
lstrip
Returns a copy of the string with all leading whitespace characters removed. Leading whitespace characters are spaces, newlines (\n), and tabs (\t) that appear at the beginning of the string.
lstrip( )
The char argument is a string containing a character. Returns a copy of the string with all instances of char that appear at the beginning of the string removed.
lstrip(char)
This built-in function returns the highest value in a list. a. highest b. max c. greatest d. best of
max
Mutable
means their elements can be changed
Assume the following statement appears in a program: mylist = [ ] Which of the following statements would you use to add the string 'Labrador' to the list at index 0? a. mylist[0] = 'Labrador' b. mylist.insert(0, 'Labrador') c. mylist. append ( 'Labrador' ) d. mylist.insert('Labrador', 0)
mylist.insert(0, 'Labrador')
The ____ method returns the value associated with a specified key and removes that key-value pair from the dictionary . a. pop( ) b. random( ) c. popitem( ) d. rand_pop( )
pop( )
The ____ method returns a randomly selected key-value pair from a dictionary. a. pop( ) b. random( ) c. popitem( ) d. rand pop( )
popitem( )
This file object method returns a list containing the file's contents. a. to_list b. getlist c. readline d. readlines
readlines
del Statement
removes an element from a specific index, regardless of the item that is stored at that index.
The old and new arguments are both strings. The method returns a copy of the string with all instances of old replaced by new.
replace(old, new)
Returns a copy of the string with all trailing whitespace characters removed. Trailing whitespace characters are spaces, newlines (\n), and tabs (\t) that appear at the end of the string.
rstrip( )
The char argument is a string containing a character. The method returns a copy of the string with all instances of char that appear at the end of the string removed.
rstrip(char)
The substring argument is a string. The method returns true if the string starts with substring.
startswith(substring)
This string method returns a copy of the string with all leading and trailing whitespace characters removed. a. clean b. strip c. remove_whitespace d. rstrip
strip
Returns a copy of the string with all leading and trailing whitespace characters removed.
strip( )
Returns a copy of the string with all instances of char that appear at the beginning and the end of the string removed.
strip(char)
a slice from a string, you get a span of characters from within the string. String slices are also called
substrings
This removes an item at a specific index in a list. a. the remove method b. the delete method c. the del statement d. the kill method
the del statement
You use ____ to delete an element from a dictionary. a. the remove method b. the erase method c. the delete method d. the del statement
the del statement
This string method returns true if a string contains only alphabetic characters and is at least one character in length. a. the isalpha method b. the alpha method c. the alphabetic method d. the isletters method
the isalpha method
You can remove an element from a tuple by calling the tuple's remove method. T or F
False
insert(index, item) Method
Inserts an item into the list at the specified index.
Give two reasons why tuples exist.
Processing a tuple is faster than processing a list. Tuples are safe. Because you are not allowed to change the contents of a tuple, you can store data in one and that data can not be modified (accidentally or otherwise) by any code in your program.
remove(item) Method
Removes the first occurrence of the item from the list. A ValueError exception is raised if the item is not found in the list.
sort() Method
Sorts the items in the list so they appear in ascending order (from the lowest value to the highest value).
max Function
The max function accepts a sequence, such as a list, as an argument and returns the item that has the highest value in the sequence.
min Function
The min function accepts a sequence, such as a list, as an argument and returns the item that has the lowest value in the sequence.
len Function
a built-in function that returns the length of a sequence, such as a list.
Returns a copy of the string with all alphabetic letters converted to lowercase. Any character that is already lowercase, or is not an alphabetic letter, is unchanged.
lower( )
This string method returns the lowest index in the string where a specified substring is found. a. first index of b. locate c. find d. index of
find
The substring argument is a string. The method returns the lowest index in the string where substring is found. If substring is not found, the method returns -1.
find(substring)
The ____ dictionary method returns the value associated with a specified key. If the key is not found, it returns a default value. a. pop( ) b. key( ) c. value( ) d. get( )
get( )
means that once they are created, they cannot be changed
immutable
This operator determines whether one string is contained inside another string. a. contains b. is in c. == d. in
in
You can use the ____ operator to determine whether a key exists in a dictionary. a. & b. in c. ^ d. ?
in
This is a number that identifies an item in a list. a. element b. index c. bookmark d. identifier
index
Tuple
is a sequence, very much like a list, but is an immutable sequence, which means that that once a tuple is created, its contents cannot be changed.
slice
is a span of items that are taken from a sequence. A slicing expression selects a range of elements from a sequence.
Returns true if the string contains only alphabetic letters or digits and is at least one character in length. Returns false otherwise.
isalnum( )
Returns true if the string contains only alphabetic letters and is at least one character in length. Returns false otherwise.
isalpha( )
Returns true if the string contains only numeric digits and is at least one character in length. Returns false otherwise.
isdigit( )
Returns true if all of the alphabetic letters in the string are lowercase, and the string contains at least one alphabetic letter. Returns false otherwise.
islower( )
Returns true if the string contains only whitespace characters and is at least one character in length. Returns false otherwise. (Whitespace characters are spaces, newlines (\n), and tabs (\t).
isspace( )
Returns true if all of the alphabetic letters in the string are uppercase, and the string contains at least one alphabetic letter. Returns false otherwise.
isupper( )
The ____ method returns all of a dictionary's keys and their associated values as a sequence of tuples. a. keys_values( ) b. values( ) c. items ( ) d. get( )
items ( )
This function returns the length of a list. a. length b. size c. len d. lengthof
len
This function returns the length of a string. a. length b. size c. len d. lengthof
len
The ____ function returns the number of elements in a dictionary: a. size( ) b. len( ) c. elements( ) d. count( )
len( )
The following function returns the number of elements in a set: a. size( ) b. len( ) c. elements( ) d. count( )
len( )
Built-in function to convert a tuple to a list
list ( )
This is the first index in a list. a. - 1 b. 1 c. 0 d. The size of the list minus one
0
This is the first index in a string. a. - 1 b. 1 c. 0 d. The size of the string minus one
0
index( item) Method
Returns the index of the first element whose value is equal to item. A ValueError exception is raised if item is not found in the list.
reverse() Method
Reverses the order of the items in the list.
What is the index of the first character in a string?
0
If a string has 10 characters, what is the index of the last character?
9
If you call the index method to locate an item in a list and the item is not found, this happens. a. A ValueError exception is raised. b. An Invalidindex exception is raised. c. The method returns - 1. d. Nothing happens. The program continues running at the next statement.
A ValueError exception is raised.
What happens if you try to use an invalid index to access a character in a string?
An IndexError Exception occurs
This will happen if you try to use an index that is out of range for a list. a. A ValueError exception will occur. b. An IndexError exception will occur. c. The list will be erased and the program will continue to run. d. Nothing-the invalid index will be ignored.
An IndexError exception will occur.
This will happen if you try to use an index that is out of range for a string. a. A ValueError exception will occur. b. An IndexError exception will occur. c. The string will be erased and the program will continue to run. d. Nothing-the invalid index will be ignored.
An IndexError exception will occur.
List
An object that contains multiple data items. Lists are mutable, which means that their contents can be changed during a program's execution.
How do you find the number of elements in a list?
By using the len Function. The len function takes the list as an argument and it returns the number of the elements present in the list .
A file object's writelines method automatically writes a newline ( '\n' ) after writing each list item to the file. T or F
False
Assume list1 references a list. After the following statement executes, list1 and list2 will reference two identical but separate lists in memory: list2 = list1 T or F
False
Lists in Python are immutable. T or F
False
The isupper method converts a string to all uppercase characters. T or F
False
When you call a string's split method, the method divides the string into two substrings. T or F
False
When the * operator's left operand is a list and its right operand is an integer, the operator becomes this. a. The multiplication operator b. The repetition operator c. The initialization operator d. Nothing-the operator does not support those types of operands.
The repetition operator
Repetition Operator
The repetition operator makes multiple copies of a list and joins them all together. The star symbol is used, when the operand on the left side of the * symbol is a sequence (such as a list) and the operand on the right side is an integer, it becomes a repetition operator.
This is the last index in a list. a. 1 b. 99 c. 0 d. The size of the list minus one
The size of the list minus one
This is the last index in a string. a. 1 b. 99 c. 0 d. The size of the string minus one
The size of the string minus one
A list can be an element in another list. T or F
True
Once a string is created, it cannot be changed. T or F
True
The del statement deletes an item at a specified index in a list. T or F
True
The repetition operator ( *) works with strings as well as with lists. T or F
True
Tuples in Python are immutable. T or F
True
You can use the + operator to concatenate two lists. T or F
True
You can use the for loop to iterate over the individual characters in a string. T or F
True
A Tuple does not support what methods?
Tuples do not support methods such as append, remove, insert, reverse, and sort.
How do you find the length of a string?
Use the len( ) function
What is the primary difference between a list and a tuple?
a list is mutable, which means that a program can change its contents. a tuple is immutable, which means that once it is created, its contents cannot be changed.
two-dimensional list (nested lists)
a list that has other lists as its elements.
You can add one element to a set with this method. a. append b. add c. update d. merge
add
Sequence
an object that holds multiple items of data, stored one after the other. You can perform operations on a sequence to examine and manipulate the items stored in it.
This list method adds an item to the end of an existing list. a. add b. add to c. increase d. append
append
How do you find the lowest and highest values in a list?
by using the min and/or the max functions
in Operator
can be used to determine whether an item is contained in a list.
append(item) Method
commonly used to add items to a list. The item that is passed as an argument is appended to the end of the list's existing elements.
appending one string to the end of another string
concatenation
This set method removes an element but does not raise an exception if the element is not found. a. remove b. discard c. delete d. erase
discard
This term refers to an individual item in a list. a. element b. bin c. cubbyhole d. slot
element
The substring argument is a string. The method returns true if the string ends with substring.
endswith(substring)
This string method returns true if a string contains only numeric digits and is at least one character in length. a. the digit method b. the isdigit method c. the numeric method d. the isnumber method
the isdigit method
What is the difference between calling a list's remove method and using the del statement to remove an element?
the remove method is used to remove a specific element in a list. the del method is used to remove any element that is present at a specific index, regardless of what that element is.
Built-in function to convert a list to a tuple
tuple ( )
You can add a group of elements to a set with this method. a. append b. add c. update d. merge
update
Returns a copy of the string with all alphabetic letters converted to uppercase. Any character that is already uppercase, or is not an alphabetic letter, is unchanged.
upper( )
Which of the following statements creates a tuple? a. values [1, 2, 3, 4] b. values {1, 2, 3, 4} c. values ( 1) d. values ( 1,)
values ( 1,)
You can use ____ to create an empty dictionary. a. { } b. ( ) c. [ ] d. empty( )
{ }