Python an Introduction to Dictionary and Loops in English. This presentation has been prepared to take the class in live youtube stream https://youtu.be/dPm4mhuEEbI

1. 1plo
Python – Dictionary and Loops
Mahalakshmi Arulalan
maharulalan@gmail.com

2. Sets

3. >>> thisset = {"apple", "banana", "cherry"}
print(thisset)
>>> thisset.add("orange")
>>> thisset.update(["orange", "mango",
"grapes"])
>>> thisset.copy() //Returns a copy of the set
>>> thisset.discard("banana") // Remove the
specified item

4. >>> discard() Remove the specified item
>>> thisset.add("orange")
thisset = {"apple", "banana", "cherry"}
>>> thisset.update(["orange", "mango",
"grapes"])
print(thisset)

5. String

6. name = 'Arul'
name[0]
>>>'A'
myname = 'Arul' + 'alan'
>>> 'Arulalan'

7. name = 'This is python string'
name.split(' ')
>>>['This','is','python','string']
comma = 'Shrini,Arul,Suresh'
comma.split(',')
>>> ['Shrini','Arul','Suresh']
split

8. li = ['a','b','c','d']
s = '-'
new = s.join(li)
>>> a-b-c-d
new.split('-')
>>>['a','b','c','d']
join

9. 'small'.upper()
>>>'SMALL'
'BIG'.lower()
>>> 'big'
'mIxEd'.swapcase()
>>>'MiXwD'

10. Dictionary

11. menu = {
“idly” : 2.50,
“dosai” : 10.00,
“coffee” : 5.00,
“ice_cream” : 5.00,
100 : “Hundred”
}
menu[“idly”]
2.50
menu[100]
Hundred

12. Loop

13. for i in range(1, 5):
print i
print 'The for loop is over'

14. for i in ["apple", "banana", "cherry"]:
print i
print 'The for loop is over'

15. for i in range(1, 5):
for j in range (10,20):
print i,j
print 'The for loop is over'

16. number = 23
running = True
while running :
guess = int(raw_input('Enter an integer : '))
if guess == number :
print 'Congratulations, you guessed it.'
running = False
elif guess < number :
print 'No, it is a little higher than that.'
else:
print 'No, it is a little lower than that.'
print 'Done'

17. number = 23
while True :
guess = int(raw_input('Enter an integer : '))
if guess == number :
print 'Congratulations, you guessed it.'
break
elif guess < number :
print 'No, it is a little higher than that.'
else:
print 'No, it is a little lower than that.'
print 'Done'

18. Single Line if, for loop

19. End of the Day three.