Lists

Question 1

What a list in Python is?

Answer 1

datatype you can use to store a collection of different pieces of information as a sequence under a single variable name.

Question 2

How you can assing items to a list? How you can create lists? Give an example of expression

Answer 2

list_name = [item_1, item_2]

Question 3

How to create an empty list?

Answer 3

empty = []

Question 4

How you can access the particular item inside the list

Answer 4

list_name[0] #it is called index

Question 5

How to replace an item inside the list with another. Replace the first item inside the list list=[‘one’,’two’]

Answer 5

list[0]=’the real one’

Question 6

How to add items to a list

Answer 6

list_name.append(“I have new friends”)

Question 7

What is list slicing? How it is performed in Python? On how many ways it can be called ?

Answer 7

first  = suitcase[0:2]  
# The first and second items (index zero and one)
middle = suitcase[2:4]         
# Third and fourth items (index two and three)
last   = suitcase[4:]           
 # The last two items (index four and five)

Question 8

How can you slice strings and lists

Answer 8

animal{:3] 
#from begining to 3rd ithem(WITH)
animal[1:] #from first to last

Question 9

What is called the function that can search throught the list and returns an index of this item?

Answer 9

list.index(“The item value”)

Question 10

How looks the function that adds an item at specified index

Answer 10

list.insert(1, “dog”) #inserts dog at index one

Question 11

How to iterate through all items inside the list

Answer 11

for thing in list:
    print thing 
#prints all things inside the list

Question 12

How to sort items inside the list

Answer 12

list.sort()

Question 13

How to use keys inside the list -> create hash maps

Answer 13

d = {‘key1’ : 1, ‘key2’ : 2, ‘key3’ : 3}

Question 14

How to add new entries into the Python Key list -> hash map

Answer 14

list[‘new key’] = ‘new crazy value’

Question 15

How can you get rid of a specific value inside the dictionary. DIctionaries are mutable.

Answer 15

del dict_name[key_name]
# will remove the item with specific key

Question 16

To remove something from a list you need to use?

Answer 16

list.remove(“matching pattern”)

Question 17

Can you join dictionaries and lists together?

Answer 17

my_dict = {
    "fish": ["c", "a", "r", "p"],
    "cash": -4483,
    "luck": "good"
}
print my_dict["fish"][0]