In [1]: 
l = [ "hello", 12345, [ 123345, 1323, 43434] ]
In [2]: 
print l

['hello', 12345, [123345, 1323, 43434]]
In [3]: 
print l[0]

hello
In [4]: 
print l[2]

[123345, 1323, 43434]
In [6]: 
print l[2][2]

43434
In [7]: 
print l[2, 2]

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-7-cc0d71862d19> in <module>()
----> 1 print l[2, 2]

TypeError: list indices must be integers, not tuple
In [8]: 
print l

['hello', 12345, [123345, 1323, 43434]]
In [10]: 
print l[0]
print l[0][2]
print l[0][1]

hello
l
e
In [11]: 
for element in l:
    print element

hello
12345
[123345, 1323, 43434]
In [12]: 
range(10)
Out[12]:
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
In [13]: 
range(5, 10)
Out[13]:
[5, 6, 7, 8, 9]
In [14]: 
range(5, 10, 2)
Out[14]:
[5, 7, 9]
In [15]: 
for i in range(5, 16, 5):
    print "The square of ", i, " is ", i**2
    print "The square root of ", i, " is ", i**0.5

The square of  5  is  25
The square root of  5  is  2.2360679775
The square of  10  is  100
The square root of  10  is  3.16227766017
The square of  15  is  225
The square root of  15  is  3.87298334621
In [16]: 
for vowel in 'aeiuyo':
    print vowel

a
e
i
u
y
o
In [24]: 
print l[0]
print l[0][-1]
print l[0][1:]
print l[0][2:]
print l[0][1:-1]
print l[0][::2]
print l[0][::-1]

hello
o
ello
llo
ell
hlo
olleh
In [25]: 
if 12 < 13:
    print 'yeah'
else:
    print 'hummmm'

yeah
In [26]: 
len('hello')
Out[26]:
5
In [27]: 
len(l)
Out[27]:
3
In [28]: 
l
Out[28]:
['hello', 12345, [123345, 1323, 43434]]
In [29]: 
for i in range(len(l)):
    print "l[", i, "] = ", l[i]

l[ 0 ] =  hello
l[ 1 ] =  12345
l[ 2 ] =  [123345, 1323, 43434]
In [30]: 
for i,v in enumerate(l):
    print "l[", i, "] = ", v

l[ 0 ] =  hello
l[ 1 ] =  12345
l[ 2 ] =  [123345, 1323, 43434]
In [32]: 
list(enumerate(l))
Out[32]:
[(0, 'hello'), (1, 12345), (2, [123345, 1323, 43434])]
In [33]: 
l
Out[33]:
['hello', 12345, [123345, 1323, 43434]]
In []: