如何在 If 语句中退出/中断 Python 自动化脚本（不在循环内）

Question

I am trying to run a program but that program needs to read a config file. This config file has to have a base directory from which it will read the files. The config file has several sections for different sub directories from the base file.

Ultimately I want the program to break the script and return an error message if the base directory is not inside the config file.

This requires an If Statement. However if statements typically don't break scripts. How can I write an if statemtent that will break the function in which this config file is read from which will also break the script? This function will be used inside another function

def process_dirconfig_file(config_file_from_sysarg):
    config = ConfigParser()
    config.read(config_file_from_sysarg)
    dirconfig_file_Pobj = Path(config_file_from_sysarg)
    if Path.is_file(dirconfig_file_Pobj):
        parseddict = {}
        for sect in config.sections():
            for k, v in config.items(sect):
                # print('{} = {}'.format(k, v))
                parseddict[k] = v
        print(parseddict)
        if ("base_dir" not in parseddict) or (parseddict["base_dir"] == ""):
            print(f"{Fore.RED} Error: Your config file is missing 'base directory' for file processing")
        elif("archive_dir" not in parseddict) or (parseddict["archive_dir"] == ""):
            print(f"{Fore.RED} Error: Your config file is missing 'archive directory' for file processing")
        elif ("error_dir" not in parseddict) or (parseddict["error_dir"] == ""):
            print(f"{Fore.RED} Error: Your config file is missing 'error directory' for file processing")
        elif ("empty_dir" not in parseddict) or (parseddict["empty_dir"] == ""):
            print(f"{Fore.RED} Error: Your config file is missing 'empty directory' for file processing")
    else:
        print(f"{Fore.RED} Error: No directory config file. Please create a config file of directories to be used in processing")

This function is being used inside this function:

def odf_history_from_csv_to_dbtable(csvfile_path_list, db_instance):
    odfsdict = db_instance['odfs_tester_history']
    #table_row = {}
    totalresult_list = []
    process_dirconfig_file(dirconfig_file)
    for csv in csvfile_path_list:  # is there a faster way to compare the list of files in archive and history?
        if csv not in archivefiles_path_set:
            csvhistoryfilelist_to_dbtable(csv, db_instance)
            odfscsv_df = pd.read_csv(csv, header=None, names=['ODFS_LOG_FILENAME', 'ODFS_FILE_CREATE_DATETIME', 'LOT', 'TESTER', 'WAFER_SCRIBE'])
            odfscsv_df['CSV_FILENAME'] = csv.name #add csvfilename column to existing df
            result = odfscsv_df.to_sql('odfs_tester_history', con=odfsdict['engine'], if_exists='append', index=False)
            totalresult_list.append(result)


        else:
            print(csv.name + " is in archive folder already")
    #print (totalresult_list)
    return totalresult_list

db_instance = dbhandler()
odfs_tabletest_dict = db_instance['odfs_tester_history_files']

Answer 1

You can use a structure like this: (Basic Exception Handling) :

In case there are two methods: Caller(b) and Called(a)

def a(x):
try:
    if(x%2==0): raise Exception("Even Integer")
    else: raise Exception("Odd Integer")
except Exception as e:
    raise Exception(e)


def b():
    try:
        a(3)
    except Exception as e:
        print(e)
        
b()

Answer:

Odd Integer

Answer 2

If I understand your question correctly it sounds like you should be using try/except instead of if statements. This will try to read the code except when it comes to an error in which case it will stop the code and return that error.