s = 'Ab,Cd,Ef'
print s.find('d')
print s.find('D')
print s.replace('Cd','Gh')
print s.lower()
print s.upper()
print s.split()
print s.split(',')

4
-1
Ab,Gh,Ef
ab,cd,ef
AB,GH,EF 
['A','b',',','C','d',',','E','f'] 
['Ab','Cd','Ef']

l = [1,2,3,4] 
print l 
l.append(5) 
print l 
l.append(1) 
print l 
print l.count(1),l.count(2) 
l.extend([5,6,7]) 
print l 
l.insert(5,8) 
print l 
print l.pop() 
print l 
l.remove(5) 
print l 
l.reverse() 
print l 
l.sort() 
print l

[1, 2, 3, 4] 
[1, 2, 3, 4, 5] 
[1, 2, 3, 4, 5, 1] 
2 1 
[1, 2, 3, 4, 5, 1, 5, 6, 7] 
[1, 2, 3, 4, 5, 8, 1, 5, 6, 7] 
7 
[1, 2, 3, 4, 5, 8, 1, 5, 6] 
[1, 2, 3, 4, 8, 1, 5, 6] 
[6, 5, 1, 8, 4, 3, 2, 1] 
[1, 1, 2, 3, 4, 5, 6, 8]

d = {'a': 1, 'b': 2, 'c': 3} 
print d 
print d.items() 
print d.keys() 
print d.values()

{'a': 1, 'c': 3, 'b': 2} 
[('a', 1), ('c', 3), ('b', 2)]
['a', 'c', 'b'] 
[1, 3, 2]