<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def read_from_buffer(cls, buf, identifier_str=None):
 """Load the context from a buffer."""

        try:
            return cls._read_from_buffer(buf, identifier_str)
        except Exception as e:
            cls._load_error(e, identifier_str)