pyqt5应用程序:第三个小部件不会在运行时显示,但是它在调试模式下是可见的(pycharm)

bfhwhh0e  于 2021-07-13  发布在  Java
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我有一个以qmainwindow开头的应用程序。在为数据库和其他东西选择合适的位置(目录)后,它允许用户启动plc控制器的设置,该控制器位于第二个窗口(qwidget)上。到目前为止没有问题。
在第二个窗口(setupwindow)构建的同时,它还检查一系列xml文件,对它们进行解析,构建字典等。
如果在解析时遇到错误,我想捕获它,请停止安装窗口完成填充表、列表等,然后弹出第三个窗口,显示解析错误,并允许用户编辑坏的xml并修复它(启动所选的文本编辑器)。
每一个空模块都可以正常工作(小部件驻留在不同的模块上)。当我把它们放在一起的时候,在解析异常的情况下,第三个窗口没有显示,应用程序继续填充第二个窗口(部分是在这个时候,因为一些xml由于格式错误而被跳过,这就是我试图捕捉的异常)。
奇怪的是,当我尝试从pycharm调试它时,在异常处中断,然后进入,第三个窗口会定期弹出。我做错什么了?
这是我的代码(注意:我使用qtdesigner来设置ui布局)。
第一个主窗口(摘要:单击按钮的事件以启动设置):

def setupOnClick(self):
    config['active']['old_gui'] = self.ui.GUI_old_proj_path_textline.text()
    config['active']['controllers'] = self.ui.controllers_files_path_textline.text()
    config['active']['proj_dest'] = self.ui.dest_folder_textline.text()
    config_name = os.path.join(this_app_path, 'config.ini')
    with open(config_name, "w") as config_file:
        config.write(config_file)
    import SetupControllers
    self.setupWin = SetupControllers.MainWindow(config,
                                                config_name,
                                                self.main_icon,
                                                MainWindow.CurProJectName)

这是第二个窗口(设置控制器):

from lib.SearchControllers import get_controller_dict  # this is an external module where I stuff various functions
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtGui as qtg

myForm_2, baseClass = uic.loadUiType('./forms/setup.ui')
class MainWindow(baseClass):
    def __init__(self, config_obj: ConfigParser,
                 config_name: str,
                 icon:  qtg.QIcon(),
                 proj_name: str,
                 *args,
               **kwargs):
        super().__init__(*args,**kwargs)
        self.ui = myForm_2()
        self.ui.setupUi(self)
        self.setWindowIcon(icon)
        self.setWindowTitle(proj_name + " Setup")
        self.root_path = self.config_obj['active']['controllers']
        # doing some more init stuff
        # .........................
        self.load_bulk()   # starting to parse xml dbase to populate the various widgets
        self.show

以下是调用解析函数的位置:

def load_bulk(self):
    # get the list of running components into a dictionary
    for i in self.list_controllers:
        i_path = os.path.join(self.root_path, i)
        self.components[i] = get_controller_dict(i_path,
                                                 self.config_obj,
                                                 'Application.xml',
                                                 'Subcomponents/Subcomponent',
                                                 'Name',
                                                 'src')

下面是解析函数,我想在其中捕获异常:

import lib.parsingError as PE
def get_controller_dict(controller_path: str,
                        config: ConfigParser,
                        target: str,
                        inner_element: str,
                        tag_key: str,
                        tag_value: str,
                        tag_value_2: str=None):
    gc_dict = {}
    cdp_app_file = os.path.join(controller_path, target)
    if not os.path.exists(cdp_app_file):
        return gc_dict
    try:
        root = ET.parse(cdp_app_file).getroot()
        for type_tag in root.findall(inner_element):
            gc_dict[type_tag.attrib[tag_key]] = type_tag.attrib[tag_value]
    except ET.ParseError as ex: # debug breakpoint is here
        parseErr = PE.MainWindow(config, ex, cdp_app_file)
    except Exception as ex:
        show_exception(f"Parsing {cdp_app_file}", ex)
    return gc_dict

最后是pe.parsing错误。同样,它也驻留在自己的模块中:

from PyQt5 import uic
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtGui as qtg
from configparser import ConfigParser
myForm_3, baseClass = uic.loadUiType('./forms/parseErr.ui')
class MainWindow(baseClass):
    def __init__(self, config_obj: ConfigParser,
                 exc: ET.ParseError,
                 filename: str,
                 *args,
               **kwargs):

        super().__init__(*args,**kwargs)
        # your code begins here
        self._icon = qtg.QIcon()
        self.ui = myForm_3()
        self.ui.setupUi(self)
        self.ui.MM_logo.setPixmap(qtg.QPixmap(':/logo_Small.png'))
        self.main_icon = qtg.QIcon()
        self.main_icon.addPixmap(qtg.QPixmap(':/logo_Small.png'), qtg.QIcon.Normal, qtg.QIcon.Off)
        self.setWindowIcon(self.main_icon)
        self.exc = exc
        self.config = config_obj
        self.filename = filename
        self.setLabels()
        self.ui.OK_butt.clicked.connect(self.ok_onClick)
        self.ui.validate_butt.clicked.connect(self.validate_onClick)
        self.ui.editXml_butt.clicked.connect(self.editXML)
        # your code ends here
        self.show()

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