Hello,
I need to gather information that is contained in various files.
Like so:
file1: ===================== foo : 1 2 bar : 2 4 baz : 3 =====================
file2: ===================== foo : 5 bar : 6 baz : 7 =====================
file3: ===================== foo : 4 18 bar : 8 =====================
The straightforward way to solve this problem is to create a dictionary. Like so:
[...]
a, b = get_information(line) if a in dict.keys(): dict[a].append(b) else: dict[a] = [b]
Aye...
the dict.keys() line creates a temporary list, and then the 'in' does a linear search of the list. Better would be:
try:
dict[a].append(b)
except KeyError:
dict[a] = [b]since you expect the key to be there most of the time, this method is most efficient. You optomistically get the dictionary entry, and on the exceptional case where it doesn't yet exist you add it.
-- \/ \/ (O O) -- --------------------oOOo~(_)~oOOo---------------------------------------- Keith Dart <[EMAIL PROTECTED]> public key: ID: F3D288E4 ============================================================================ -- http://mail.python.org/mailman/listinfo/python-list
