In this case, [True] and [False] are not lists, rather you're accessing the items of the list with the index True or False, as per the following example:
>>> a_list = ['a', 'b'] >>> a_list[True] 'b' >>> a_list[False] 'a' This happens because the __getitem__ method takes its argument (which in this case is True or False) and casts it into an integer: >>> int(True) 1 >>> int(False) 0 So thus it follows logically that since: >>> a_list[1] 'b' >>> a_list[0] 'a' a_list[True] and a_list[False] must be its first and zeroth indexed members, respectively. On 7/4/07, kath <[EMAIL PROTECTED]> wrote: > Hi, > > Can any one please tell me how is the following code is working? > ['a','b'] is a list of string, and [True] is list of boolean value. > How is it making effect....? > <code Python24> > > >>> ['a','b] [True] > 'b' > >>> ['a','b'] [False] > 'a' > >>> ['a','b']['some_string' == r'some_string'] > 'b' > >>> ['a','b']['some_string' == r'somestring'] > 'a' > > <code> > > > Thanks in advance, > regards, > kath. > > -- > http://mail.python.org/mailman/listinfo/python-list > -- Kelvie -- http://mail.python.org/mailman/listinfo/python-list
