(self, filename)
Parameters
        ----------
        filename : str
            name of the file to open
Parameters
        ----------
        filename : str
            name of the file to open
Parameters ---------- filename : str name of the file to open
def __init__(self, filename):
        """
        Parameters
        ----------
        filename : str
            name of the file to open
        """
        self.filename = filename
        self.sheet = None
def __init__ ( self , filename ) : self . filename = filename self . sheet = None