Python在series中调用split()函数抛出异常

    AttributeError: 'Series' object has no attribute 'split'
    
    
      
    

    a.astype('str').str.split(" ").str[0]
    
    
      
    

    series.py 源码
    ...
    str = CachedAccessor("str", StringMethods)
    dt = CachedAccessor("dt", CombinedDatetimelikeProperties)
    cat = CachedAccessor("cat", CategoricalAccessor)
    plot = CachedAccessor("plot", pandas.plotting.PlotAccessor)
    sparse = CachedAccessor("sparse", SparseAccessor)
    ...