Taken task based approach for Session 3, day 1.
Removed introduction to dictionaries slide and accommodated the same
content while solving the problem.
import keyword
f = open('/path/to/file')
freq = {}
for line in f:
words = line.split()
for word in words:
key = word.strip(',.!;?()[]: ')
if keyword.iskeyword(key):
value = freq[key]
freq[key] = value + 1
print freq