dictionaries

Question 1

insert an input (create calculator)

Answer 1

input (“message”)

Question 2

create dictionari called dic

Answer 2

dic={‘key’ : value, ‘key2’ : value2}

Question 3

access a value in dictionary in key a

Answer 3

dic=[‘a’]

Question 4

print a dictionary called dic

Answer 4

print (dic)

Question 5

add a value xxx to dic (to a non existing key)

Answer 5

dic [‘newkey’]= xxx

Question 6

update a value to xxx

Answer 6

dic [‘existingkey’]= xxx

Question 7

delete a value in key a

Answer 7

del dic[‘a’]

Question 8

check in a key ‘a’ is there (boolean)

Answer 8

‘a’ in dic

Question 9

get list of keys

Answer 9

dic.keys()

Question 10

get values list

Answer 10

dic.values()

Question 11

iterate by key (i want to know the keys list)

Answer 11

for k in dic.keys() :

print (k)

Question 12

iterate by key ( i want a list of all the values associati ad ogni possibile key, ma vedo solo i values)

Answer 12

for k in dic.keys() :

print (dic[k])

Question 13

merge two dictionaries dic1 e dic2 (4 modi, 2 modificando uno dei dic, due senza modificarli)

Answer 13

d1 = {'a':1, 'b':2}
 d2 = {'c':3, 'd':5}
for k in d2.keys():
	 d1[k]=d2[k]
print (d1)

d1.update(d2)

dic1.copy()
dic3=dic1.copy()
for k in dic2.keys():
	dic3[k]=dic2[k]
print(dic3)

dic3= {**dic1, **dic2 }

Question 14

definire funzione xxx con arguments gia settati (Esempio: somma)

Answer 14

def xxxfunction(a,b) :
    c=a + b
    return c

Question 15

definire funzione xxx con arbitarry arguments

Answer 15

def xxxfunctionExt ( *nums) :