ejercicios marcos python

alphabetical.py

# http://stackoverflow.com/a/19618657/472866
#import ipdb
groups = []
cur_longest = ''
prev_char = ''
##ipdb.set_trace()
for char in s.lower():
    if prev_char and char < prev_char:
        groups.append(cur_longest)
        cur_longest = char
    else:
        cur_longest += char
    prev_char = char
groups.append(cur_longest)
if not groups:
    groups = [s]
#print groups
print "Longest substring in alphabetical order is: %s" %  max(groups, key=len)

bob.py

# http://stackoverflow.com/questions/19302525/python-how-to-count-overlapping-occurrences-of-a-substring
import re
veces = len(re.findall('(?=bob)', s))
print "Number of times bob occurs is: %s" % veces