The values of a dictionary can be accessed using keys
The keys of a dictionary can be accessed using values
Dictionaries aren’t ordered
Dictionaries are mutable
del
remove
removeAll
None of these
What will be the output of the following Python code snippet?
d = {"john":40, "peter":45}print("john" in d)
True
False
None
Error
What will be the output of the following Python code?
d1={"abc":5,"def":6,"ghi":7}print(d1[0])
abc
5
{"abc":5}
error
a={1:"A",2:"B",3:"C"}for i in a: print(i,end=" ")
1 2 3
‘A’ ‘B’ ‘C’
1 ‘A’ 2 ‘B’ 3 ‘C’
Error, it should be: for i in a.items():
d = {0: 'a', 1: 'b', 2: 'c'}for i in d: print(i)
0 1 2
a b c
0 a 1 b 2 c
none of the mentioned
numbers = {}letters = {}comb = {}numbers[1] = 56numbers[3] = 7letters[4] = 'B'comb['Numbers'] = numbers comb['Letters'] = lettersprint(comb)
Error, dictionary in a dictionary can’t exist
‘Numbers’: {1: 56, 3: 7}
{‘Numbers’: {1: 56}, ‘Letters’: {4: ‘B’}}
{‘Numbers’: {1: 56, 3: 7}, ‘Letters’: {4: ‘B’}}
test = {1:'A', 2:'B', 3:'C'}test = {} print(len(test))
0
3
An exception is thrown
a=dict()print(a[1])
An exception is thrown since the dictionary is empty
‘ ‘
1
a={1:"A",2:"B",3:"C"}b={4:"D",5:"E"}a.update(b) print(a)
{1: ‘A’, 2: ‘B’, 3: ‘C’}
Method update() doesn’t exist for dictionaries
{1: 'A', 2: 'B', 3: 'C', 4: 'D', 5: 'E'}
{4: ‘D’, 5: ‘E’}
getkeys()
key()
keys()
test = {1:'A', 2:'B', 3:'C'}del test[1]test[1] = 'D'del test[2]print(len(test))
2
Error as the key-value pair of 1:’A’ is already deleted
More than one key isn’t allowed
Keys must be immutable
Keys must be integers
When duplicate keys encountered, the last assignment wins
What is the output of the following code?
a = {1:"A", 2: "B", 3: "C"}b = {4: "D", 5: "E"}a.update(b)print(a)
{1:’A’, 2: ‘B’,3: ‘C’}
{1: ‘A’, 2: ‘b’, 3: ‘c’, 4: ‘D’, 5: ‘E’}
String
List
Tuple
Dictionary
d.size()
len(d)
size(d)
d.len ()
More than one key can have the same value
The values of the dictionary can be accessed as dict[key]
Values of a dictionary must be unique
Values of a dictionary can be a mixture of letters and numbers
d = {0: 'a', 1: 'b', 2: 'c'}for x in d.values(): print(x)
d = {0: 'a', 1: 'b', 2: 'c'}for x in d.keys(): print(d[x])
d.delete(“john”:40)
d.delete(“john”)
del d[“john”]
del d(“john”:40)
d1 = {"john":40, "peter":45}d2 = {"john":466, "peter":45}print(d1 == d2)
a={1:"A",2:"B",3:"C"}for i,j in a.items(): print(i,j,end=" ")
1 A 2 B 3 C
A B C
1:”A” 2:”B” 3:”C”
a={} a[2]=1 a[1]=[2,3,4] print(a[1][1])
[2,3,4]
a = {}a[1] = 1a['1'] = 2a[1]=a[1]+1count = 0for i in a: count += a[i]print(count)
4
Error, the keys can’t be a mixture of letters and numbers
count={} count[(1,2,4)] = 5 count[(4,2,1)] = 7 count[(1,2)] = 6 count[(4,2,1)] = 2 tot = 0 for i in count: tot=tot+count[i] print(len(count)+tot)
25
17
16
Tuples can’t be made keys of a dictionary
Returns True if any key of the dictionary is true
Returns False if dictionary is empty
Returns True if all keys of the dictionary are true
Method any() doesn’t exist for dictionary
{1: ‘A’, 2: ‘B’}
dict([[1,”A”],[2,”B”]])
{1,”A”,2”B”}
{ }
dictionary()
set()
tuple()
list()
a={1:"A",2:"B",3:"C"}print(a.items())
Syntax error
dict_items([(‘A’), (‘B’), (‘C’)])
dict_items([(1,2,3)])
dict_items([(1, ‘A’), (2, ‘B’), (3, ‘C’)])
a={1:"A",2:"B",3:"C"}print(a.get(3))
Error, invalid syntax
A
C
a={1:"A",2:"B",3:"C"}print(a.get(1,4))
Invalid syntax for get method
dict={"Joey":1, "Rachel":2}dict.update({"Phoebe":2})print(dict)
{'Joey': 1, 'Rachel': 2, 'Phoebe': 2}
{“Joey”:1,”Rachel”:}
{“Joey”:1,”Phoebe”:2}
Which of the following will delete key-value pair for key="tiger" in dictionary?
dic={"lion":"'wild","tiger":"'wild",'cat":"domestic","dog":"domestic"}
del dic("tiger")
dic["tiger"].delete()
delete(dic.["tiger'])
del dic["tiger"]
d = {0: 'a', 1: 'b', 2: 'c'}for x in d.values(): print(d[x])
Clears all key-value pairs
Updates a specific key
Merges another dictionary into the current one
Removes all values
a={}a['a']=1a['b']=[2,3,4] print(a)
Exception is thrown
{‘b’: [2], ‘a’: 1}
{‘b’: [2], ‘a’: [3]}
{'a': 1, 'b': [2, 3, 4]}
getkeys ()
Removes an arbitrary element
Removes all the key-value pairs
Removes the key-value pair for the key given as an argument
Invalid method for dictionary
Sequence value pair
Key value pair
Tuple value pair
Record value pair
total={}def insert(items): if items in total: total[items] += 1 else: total[items] = 1insert('Apple')insert('Ball')insert('Apple') print (len(total))
a={1:"A",2:"B",3:"C"}a.clear() print(a)
{ None:None, None:None, None:None}
{1:None, 2:None, 3:None}
a={'B':5,'A':9,'C':7}print(sorted(a))
[‘A’,’B’,’C’]
[‘B’,’C’,’A’]
[5,7,9]
[9,5,7]
d = {"john":40, "peter":45}print(list(d.keys()))
[“john”, “peter”]
[“john”:40, “peter”:45]
(“john”, “peter”)
(“john”:40, “peter”:45)
a={1:"A",2:"B",3:"C"}b=a.copy()b[2]="D" print(a)
Error, copy() method doesn’t exist for dictionaries
{1: ‘A’, 2: ‘D’, 3: ‘C’}
“None” is printed
d1 = {"john":40, "peter":45}d2 = {"john":466, "peter":45}print(d1 > d2)
a = {} a[1] = 1 a['1'] = 2 a[1.0]=4 count = 0 for i in a: count += a[i] print(count) print(a)
6
Since “susan” is not a value in the set, Python raises a KeyError exception
It is executed fine and no exception is raised, and it returns None
Since “susan” is not a key in the set, Python raises a KeyError exception
Since “susan” is not a key in the set, Python raises a syntax error
>>> a={1:"A",2:"B",3:"C"}>>> del a
method del doesn’t exist for the dictionary
del deletes the values in the dictionary
del deletes the entire dictionary
del deletes the keys in the dictionary
allkeys()
keyvalues()
a={1:"A",2:"B",3:"C"}a.setdefault(4,"D") print(a)
{1: ‘A’, 2: ‘B’, 3: ‘C’, 4: ‘D’}
[1,3,6,10]