Python: Expanding List of Class Objects

this is a quick one. Suppose I got a multidimensional list of class objects, named tab开发者_StackOverflow中文版le, and I need to access the class attribute .name.

I don't want to use nested loops, and of course to print this, I need to use format().

for i in range(3):
    print '{0} - {1} - {2}'.format(*table[i].name)

Obviously that didn't work. As well as (*table[i]).name. I need to be able to access .name for each class object in the table[i] list. Mind if you put me to the right direction? Thanks in advance.

{arg_name.attribute_name} also works:

for row in table:
    print(' - '.join('{0.name}'.format(elt) for elt in row))

Like this, for example:

for row in table:
    print '{0} - {1} - {2}'.format(*[x.name for x in row])

I don't want to use nested loops

This is silly. To iterate over each element of a multidimensional array, you need to use nested loops. They may be implicit (map or a list comprehension) but that doesn't mean they're not there! The following is going to be much neater and cleaner than anything with map or a nasty format unpacking.

for row in table:
    for elt in row:
        print <...>

If you really want to know how to use your method:

import operator
for row in table:
    print '{0} - {1} - {2}'.format(*map(operator.attrgetter('name'), row))

Tell me that's not messy and unclear compared to the above, not to mention the fact that you've hardcoded in the magic constant 3 -- what if you want to change to a 4x4 table?