PyQt5 中的 ProgressBar 用於多處理

Question

我在我的 pythonGUI 腳本中實現了一個進度條，當單擊運行按鈕時，它會執行另一個 python 腳本，在該腳本中我使用多處理從數據庫中獲取查詢並生成 output ZBF57C906FA7D2BB66D07372E4 假設有大約 10 個查詢要執行並生成 10 個 excel 輸出。 在這種情況下，如何實現多處理的進度條。？

提前謝謝你

Answer 1

鑒於我沒有您的 go 代碼，我對您使用的內容和整體結構做了一些假設。 但是，希望這里有足夠的信息，以便您可以根據自己的需要和特定代碼進行調整。

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!')