In [2]:
m_list = []

for letter in 'word':
    m_list.append(letter)

print m_list


['w', 'o', 'r', 'd']

In [3]:
m_list2 = [letter for letter in 'word']

In [4]:
m_list2


Out[4]:
['w', 'o', 'r', 'd']

In [8]:
m_list3 = [letter*2 for letter in 'word']

In [9]:
m_list3


Out[9]:
['ww', 'oo', 'rr', 'dd']

In [10]:
m_list4 = [x**2 for x in [x**2 for x in range(11)]]

In [11]:
m_list4


Out[11]:
[0, 1, 16, 81, 256, 625, 1296, 2401, 4096, 6561, 10000]

In [ ]: