make "source" argument to interlocks.acquire mandatory
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@ -45,7 +45,7 @@ class InterProcessLockBase:
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def acquire_impl(self, wait): abstract
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def acquire(self, wait=False, retry_time=1, source=None):
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def acquire(self, source, wait=False, retry_time=1):
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if source == None:
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source="Unknown"
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if self._has_lock: # make sure 2nd acquire in same process fails
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