Filter for multiindex (2-column) series

filterForLabels.py

def filterForLabels(df: pd.DataFrame, label) :
    try:
        sideLeft = df[label,]
    except:
        sideLeft = pd.DataFrame()

    try:
        sideRight = df[:,label]
    except:
        sideRight = pd.DataFrame()

    if sideLeft.empty and sideRight.empty:
        return pd.DataFrame()
    elif sideLeft.empty:        
        concat = sideRight.to_frame()
        concat.rename(columns={0:'Corr'},inplace=True)
        return concat
    elif sideRight.empty:
        concat = sideLeft.to_frame()
        concat.rename(columns={0:'Corr'},inplace=True)
        return concat
    else:
        concat = pd.concat([sideLeft,sideRight], axis=1)
        concat["Corr"] = concat[0].fillna(0) + concat[1].fillna(0)
        concat.drop(columns=[0,1], inplace=True)
        return concat