Python string.join ( list ) last entry with “and”

Question

What is an elegant way to join a list of sentence parts so that the result is \"a, b, and c\" where the list is [ \'a\', \'b\', \'c\' ]? Specifying

Answer 1

"{} and {}".format(",".join(l[:-1]),l[-1]) if len(l) > 1 else l[0]


In [25]: l =[ 'a']

In [26]: "{} and {}".format(",".join(l[:-1]),l[-1]) if len(l) > 1 else l[0]
Out[26]: 'a'

In [27]: l =[ 'a','b']

In [28]: "{} and {}".format(",".join(l[:-1]),l[-1]) if len(l) > 1 else l[0]
Out[28]: 'a and b'

In [29]: l =[ 'a','b','c']

In [30]: "{} and {}".format(",".join(l[:-1]),l[-1]) if len(l) > 1 else l[0]
Out[30]: 'a,b and c'