bool()

False
type(True)

bool
my_str = "siddy"

print(my_str.isalnum())
print(my_str.isupper())

True
False

my_str='sid123'
my_str.isalnum()

True

Lists 

type([])

list
list = ['mathematics',100,10,20,122,230]
print(list)

['mathematics', 100, 10, 20, 122, 230]

list[:]
# 100 to 230
list[1:]

[100, 10, 20, 122, 230]
list[1:5]    # left is the same index and right is index we want+1

[100, 10, 20, 122]
print(list)

['mathematics', 100, 10, 20, 122, 230, 'sid', ['sid1', 'sid2'], 'sid', ['sid1', 'sid2'], 'sid', ['sid1', 'sid2']]

list.insert(1,"saxena")
print(list)

['mathematics', 'saxena', 'saxena', 100, 10, 20, 122, 230, 'sid', ['sid1', 'sid2'], 'sid', ['sid1', 'sid2'], 'sid', ['sid1', 'sid2']]

list2 = [1,2,3,4,5]
print(list2)

[1, 2, 3, 4, 5]

list2.extend([6,7])
list2

[1, 2, 3, 4, 5, 6, 7]

operations on list 

sum(list2)

28
list2.pop()

7
list2.count(2)

1
list2.index(2,1,4)

1
print(min(list2))
print(max(list2))

1
6

list2*2

[1, 2, 3, 4, 5, 6, 1, 2, 3, 4, 5, 6]