PyQt5 中的 ProgressBar 用于多处理

Question

我在我的 pythonGUI 脚本中实现了一个进度条，当单击运行按钮时，它会执行另一个 python 脚本，在该脚本中我使用多处理从数据库中获取查询并生成 output ZBF57C906FA7D2BB66D07372E4 假设有大约 10 个查询要执行并生成 10 个 excel 输出。 在这种情况下，如何实现多处理的进度条。？

提前谢谢你

Answer 1

鉴于我没有您的 go 代码，我对您使用的内容和整体结构做了一些假设。 但是，希望这里有足够的信息，以便您可以根据自己的需要和特定代码进行调整。

import PyQt5
from PyQt5 import QtWidgets
import threading

class MyClass(object):
    progressbar_progress = PyQt5.QtCore.pyqtSignal(int)

    def __init__(self):
        # progressBar refers to YOUR progress bar object in your interface
        # Change that name to whatever you've named your actual progress bar
        self.progressbar_progress.connect(self.progressbar.setValue)

    @staticmethod
    def start_thread(functionName, *args, **kwargs):
        if len(args) == 0:
            t = threading.Thread(target=functionName)
        else:
            try:
                t = threading.Thread(target=functionName, args=args, kwargs=kwargs)
            except:
                try:
                    if args is None:
                        t = threading.Thread(target=functionName, kwargs=kwargs)
                except:
                    t = threading.Thread(target=functionName)

        t.daemon = True
        t.start()

    def button_run_clicked(self):
        MyClass.start_thread(self.run_query)

# You would probably want to come up with a way to get a numerical value for your
# processes in your query. For example, if you know that you have to search through
# 10,000 entries, then that becomes your reference point. So the first query would
# be 1 out of 10,000, which would be .01% progress and the PyQt5 progress bar's
# display value is based on a percentage. So just send the current state's progress
# percentage to the signal that was created.

    def run_query(self):
        # All your querying code
        # For example, let's assume my_query is a list

        for i, q in enumerate(my_query):
            # Send the value to display to the signal like this
            self.progressBar.progress.emit(i / len(my_query))
        print('Done!')