Python Basics Part 2

Question 1

show lowest value in string

Answer 1

A=min(“helloword”)
A
‘d’

Question 2

how do you sort a list?

Answer 2

a.sort()

Question 3

insert an element in a list

Answer 3

a.insert(0,-3)# index,element

Question 4

add an element to a list

Answer 4

a.append(30)

Question 5

remove a specific element

Answer 5

a.remove(34)# remove value 34

Question 6

remove a specific position, or last

Answer 6

a.pop(3)#removes value from index 3

Question 7

program

Answer 7

data_list=[]
num = int(input(“Please enter an integer (0 to quit): “))
while num != 0:
data_list.append(num)
num = int(input(“Please enter an integer (0 to quit): “))
data_list.sort() # or sorted(data_list)

print “The values, sorted into ascendng order, are:”
for num in data_list:
print num

Question 8

create a dictionary

Answer 8

dict1={‘apple’:’Yes’,’Banana’:’No’,’Pizza’:’2’}

dict1

Question 9

print value from specific key dictionary

Answer 9

print(dict1[‘apple’])

Question 10

change a value of a dictionary

Answer 10

dict1[‘apple’]=’No’

Question 11

add a dictionary to another dictionary

Answer 11

new=[‘grapes’:’no’]

dict1.update(new)

Question 12

remove everything from dict

Answer 12

dict1.clear()

Question 13

iterate the values in a dictionary and print them

Answer 13

for key in dict1,keys():
     print(key)
another:
for key in food.keys():
    print (key)

Question 14

another view of keys in dict

Answer 14

> > > a_dict = {‘color’: ‘blue’, ‘fruit’: ‘apple’, ‘pet’: ‘dog’}
keys = a_dict.keys()
keys

Question 15

another method to iterate thru keys in dict

Answer 15

# Iterate the keys: Method 2
for key in food:
    print (key)

Question 16

how to iterate over both key and value pairs in dictionary

Answer 16

for x in food:

print(x,food[x])

Question 17

iterate over the values in a dictionary

Answer 17

# Iterate the values: Method 1
for b in food.values():
    print (b)

Question 18

another way to iterate over values

Answer 18

for b in food:

print (food[b])

Question 19

open file

Answer 19

fhandle=open(‘mbox.txt’,’r’)

print(fhandle)

Question 20

write code to enter your name and print

Answer 20

name = input(“Please enter your name: “) # raw_input converts anything it gets into a string
print(‘Hello,’, name,”!”)

Question 21

have user enter data for hight and width, convert to float and find square footage.

Answer 21

width=float(input(‘Please enter the width of the room in feet: ‘)) #float function converts input into a floating point number.
length=float(input(‘Please enter the length of the room in feet: ‘))

print(“The area of this room is “+str(widthlength)+’ square feet’
“The area of this room is”, widthlength, ‘square feet’)

Question 22

print sum of 2 values

Answer 22

a=int(input(‘please enter number’))
b=int(input(‘please enter another number’))
print (a,”+”,b, “is”, a+b)
you have to put int( in front or it will treat as string
and you’ll get 1010 instead of 20. for 10 and 10

Question 23

print a message if variable larger then 6

Answer 23

x=7
if(x>6):
 print('big')
 print('still big')
print('done')

Question 24

print if else comparing a value x=10

Answer 24

x=11
if x < 5:
    print('less then 5')
elif x<10:
    print('less then 10')
else:
    print('greater then 10')