pythonic vs non-pythonic code

avg.orig.py

from __future__ import division

def c_avrg(the_dict, exclude):
    """ Calculate the average excluding the given element"""
    i = 0
    total = 0
    for e in the_dict:
        if e != exclude:
            i += 1
            total += the_dict[e]
    if i>0: return float(total/i)
    else: return 0

avg.py

from __future__ import division

def c_avrg(the_dict, exclude):
    """ Calculate the average excluding the given element

    >>> c_avrg({'foo': 80, 'bar': 100, 'for': 99}, 'bar')
    89.5
    >>> c_avrg({'foo': 100}, 'foo')
    0

    """
    values = [v for k, v in the_dict.iteritems() if k != exclude]
    return sum(values) / len(values) if values else 0

def c_avrg(the_dict,exclude):
""" Calculate the average excluding the given element"""
the_dict=the_dict.copy()
if(exclude in the_dict) del the_dict[exclude]
return sum(the_dict.values())/len(the_dict)