HI,
1) what are the differences between list and tuple?
A list is a mutable (ie updatable) container for objects; you can add or
remove objects as much as you like. A tuple is an immutable (ie not
updatable) container, which, once created, cannot change.
The general idea is that a tuple is something like a record in Pascal or
a struct in C (without any named members), so the order of its contents
is important. For example, the function localtime of the time module
returns a tuple, whose first member is the year, second member is the
month etc.
OTOH, the order of some list's contents should bear no special meaning;
therefore a list has methods as .sort(), .reverse() etc.
Examples:
Use a list for a list of names.
Use a tuple for (x,y) coordinates in some area.
Use a list of (name,phone,address) tuples for your poor man's address
book which you will implement in python.
2) how to concatenate tuple and list? no method, no op?tor?
Convert either one to the type of the other.
If the final result should be a tuple, do something like:
final_tuple= your_tuple + tuple(your_list)
But you probably want a list, so do something like:
final_list= list(your_tuple) + your_list
3) im looking the fucking manual, and cant add value in my tuple, when it
already created :/
That's the whole idea, like the FM says in
http://www.python.org/doc/current/ref/types.html . A tuple cannot be
changed, therefore it consumes less space than a list and can be used as
a key, say, in a dictionary (unlike a list).
# You can't, but tuples can be concatenated:
(1, 2, 3, 4, 5, 6)
# or sliced:
(1, 2, 6)
# or indexed
print "the first member of %s is %s" % (a, a[0])
HTH
