Python's list type has an index() method that takes one parameter and returns the index of the first item in the list matching the parameter. For instance: >>> some_list = ["apple", "pear...

I have data that is organized in kind of a "key-key" format, rather than "key-value". It's like a HashMap, but I will need O(1) lookup in both directions. Is there a name for this type of data stru...

In PHP is there a function to do a reverse lookup on a domain name to find out how many websites are hosted on the particular shared hosting server that domain name is hosted on. Or, a way to do th...

Is there any way to do a reverse lookup using python, to check the list of websites sharing the same IP address in a shared hosting? Some web sites offer a tool for this purpose .

I'm building a web app that tracks what library books a person checks out. I have the following models: class Person(models.Model): name = models.CharField(max_length=100) def __unicode__(self):...

I have a hashable identifier for putting things in a dictionary: class identifier(): def __init__(self, d): self.my_dict = d self.my_frozenset = frozenset(d.items()) def __getitem__(self, item...