Your question does not make much sense to me, because it lacks a lot of information.
Based on my experience with Unicode, I believe that you are using Python for Windows, possibly Python 2.
UCS-4 is just one Unicode encoding, which is not the one used inside Python.
Here's what helps you debug the problem. How do I know if Python is compiled with UCS-2 or UCS-4?
And with regards to modules, you need to reinstall all binary, pure python don't need any changes.
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