title: Generate a list of random string of fixed length in python
body: <p>I need to generate a list which will have random alphanumeric string of fixed length. It will be something like: <code>list = ['ag5','5b9','c85']</code> I can make the list with random numbers, but I can't work out to make strings which will have both numbers and letters.The list will have fixed length(say 100 item). I am using python 3.</p>