On 16/01/2019 18:26, Maninath sahoo wrote: > Using of relational operator i Python? > How to use relational operator in List. > Please answer me..
Relational operators are more commonly called comparisons (or predicates). You use them with a List much as you use any other object. if list1 == list2... if list2 != list3... if list4 is list1... if listX < listY Your best bet it just to try them at the interactive >>> prompt. For example: >>> x = [1,2,3,4] >>> y = [2,5,8] >>> x == y False >>> x < y True >>> y > x True >>> x <= y True >>> z = [1,2,3] >>> x < z False >>> z < x True and so on... The other important operator with regard to lists is 'in' >>> 3 in x True >>> 3 in y False You can also see which operators are supported by looking at the dir() function output: >>> dir([]) ['__add__', '__class__', '__contains__', '__delattr__', '__delitem__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__gt__', '__hash__', '__iadd__', '__imul__', '__init__', '__init_subclass__', '__iter__', '__le__', '__len__', '__lt__', '__mul__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__reversed__', '__rmul__', '__setattr__', '__setitem__', '__sizeof__', '__str__', '__subclasshook__', 'append', 'clear', 'copy', 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort'] Notice __eq__, __ne__, __gt__, __contains__, etc -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
