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When I'm writing Python using the testcrypt API, I keep finding that I instinctively try to call vtable methods as if they were actual methods of the object. For example, calling key.sign(msg, 0) instead of ssh_key_sign(key, msg, 0). So this change to the Python side of the testcrypt mechanism panders to my inappropriate finger-macros by making them work! The idea is that I define a set of pairs (type, prefix), such that any function whose name begins with the prefix and whose first argument is of that type will be automatically translated into a method on the Python object wrapping a testcrypt value of that type. For example, any function of the form ssh_key_foo(val_ssh_key, other args) will automatically be exposed as a method key.foo(other args), simply because (val_ssh_key, "ssh_key_") appears in the translation table. This is particularly nice for the Python 3 REPL, which will let me tab-complete the right set of method names by knowing the type I'm trying to invoke one on. I haven't decided yet whether I want to switch to using it throughout cryptsuite.py. For namespace-cleanness, I've also renamed all the existing attributes of the Python Value class wrapper so that they start with '_', to leave the space of sensible names clear for the new OOish methods.