Python: How to loop through blocks of lines

Question

How to go through blocks of lines separated by an empty line? The file looks like the following:

ID: 1
Name: X
FamilyN: Y
Age: 20

ID: 2
Name: H
FamilyN: F
A         


        

Answer 1

Along with the half-dozen other solutions I already see here, I'm a bit surprised that no one has been so simple-minded (that is, generator-, regex-, map-, and read-free) as to propose, for example,

fp = open(fn)
def get_one_value():
    line = fp.readline()
    if not line:
        return None
    parts = line.split(':')
    if 2 != len(parts):
        return ''
    return parts[1].strip()

# The result is supposed to be a list.
result = []
while 1:
        # We don't care about the ID.
   if get_one_value() is None:
       break
   name = get_one_value()
   familyn = get_one_value()
   age = get_one_value()
   result.append((name, familyn, age))
       # We don't care about the block separator.
   if get_one_value() is None:
       break

for item in result:
    print item

Re-format to taste.