def all_type(dataframe):
    """
    Find all availble EV connector types in column ['EV Connector Types']

    Attributes
    --------------------------
    dataframe: DataFrame
        The DataFrame to deal

    Return
    --------------------------
    type_dict: dict
        A list of all availible connector types
    """

    type_dict = {}
    for item in dataframe['EV Connector Types']:
        # splits the long string of several EV connector types
        splt_list = item.split(' ')
        # counts the types in the entire DataFrame
        for c_type in splt_list:
            if c_type in type_dict:
                type_dict[c_type] += 1
            else:
                type_dict[c_type] = 1

    return type_dict