In a Java application files are created where the filename is a UUID generated from a protein sequence (e.g. TTCCPSIVARSNFNVCRLPGTPEAICATYTGCIIIPGATCPGDYAN) created using the function UUID.nameUUIDFromBytes. This results in the UUID c6a0deb5-0c4f-3961-9d19-3f0fde0517c2.
UUID.namedUUIDFromBytes doesn't take a namespace as a parameter, whereas in python uuid.uuid3 does. According to What namespace does the JDK use to generate a UUID with nameUUIDFromBytes?, the namespace should have been passed as part of the name, but it's no longer possible to change the java code.
Is there a way to create a custom namespace in the python code such that it will produce the same UUID's as the Java code?
nameUUIDFromBytes only takes one parameter, which is supposed to be the concatenation of the namespace and name just like you say. The namespace parameter is supposed to be a UUID, and as far as I know, they don't have a null value defined.
A "null uuid" can be passed to Python's uuid3 like this. This should work as long as the namespace has a bytes attribute (tested with Python 2 and 3):
class NULL_NAMESPACE:
bytes = b''
uuid.uuid3(NULL_NAMESPACE, 'TTCCPSIVARSNFNVCRLPGTPEAICATYTGCIIIPGATCPGDYAN')
# returns: UUID('c6a0deb5-0c4f-3961-9d19-3f0fde0517c2')