No _PyDateTime_BaseTZInfo is allocated; it's just to have something convenient to cast to, when getting at the hastzinfo member of objects starting with _PyTZINFO_HEAD.
Undocumented in source.
Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
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See Implementation
No _PyDateTime_BaseTZInfo is allocated; it's just to have something convenient to cast to, when getting at the hastzinfo member of objects starting with _PyTZINFO_HEAD.