Update SDK_advanced_guide_online.md

Yabin Li

2023-08-07 6562616ab906f559e1bcf9dc8863a481fa302dcc

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import os
 
 
def get_abs_path(rel_path):
    """
    Get absolute path
 
    Args:
        rel_path: relative path to this file
        
    Returns absolute path
    """
    return os.path.dirname(os.path.abspath(__file__)) + '/' + rel_path