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Read a registry value named name and return its value data. The class of value is same as read method returns.

If the value type is REG_EXPAND_SZ, returns value data whose environment variables are replaced. If the value type is neither REG_SZ, REG_MULTI_SZ, REG_DWORD, REG_DWORD_BIG_ENDIAN, nor REG_QWORD, TypeError is raised.

The meaning of rtype is same as read method.