[Python] Python: loop over consecutive characters?

In Python (specifically Python 3.0 but I don't think it matters), how do I easily write a loop over a sequence of characters having consecutive character codes? I want to do something like this pseudocode:

for Ch from 'a' to 'z' inclusive: #
f(Ch)


Example: how about a nice "pythonic" version of the following?

def Pangram(Str):
''' Returns True if Str contains the whole alphabet, else False '''
for Ch from 'a' to 'z' inclusive: #
M[Ch] = False
for J in range(len(Str)):
Ch = lower(Str[J])
if 'a' <= Ch <= 'z':
M[Ch] = True
return reduce(and, M['a'] to M['z'] inclusive) #


The lines marked # are pseudocode. Of course reduce() is real Python!

Dear wizards (specially old, gray-bearded wizards), perhaps you can tell that my favorite language used to be Pascal.

Continue reading...