Are you sure you installed
pydasm cannot be automatically installed by
pip, so most installations of dependent software will just assume it is installed when in their own installation process as well as when executing.
This explains how
pydasm can be compiled and installed on windows. This provides a prebuilt package and shows how to properly install it, together with additional scripts you seem to be using.
It is not too clear from your question, but it might be the case that the missing package is
pydbg, depends on how I interpret your text.
If that's the case, the second aforementioned link also describes how
pydbg can be installed, and additionally google is your friend.
If these links does not work, providing the output of
pip freeze will be a good start of additional info.