参照jacklam718的代码。

效果：

123.png

# -*- coding: utf-8 -*-
import sys
import random
from PyQt4.QtGui import *
from PyQt4.QtCore import *

class BaseProgressDialog(QMainWindow):
    def __init__(self, parent=None):
        super(self.__class__, self).__init__(parent)
        self.resize(500, 250)
        w = QWidget()
        self.scroll = QScrollArea() # 滚动条
        self.scroll.setWidgetResizable(True)
        self.scroll.setWidget(w)
        self.setCentralWidget(self.scroll)

        self.layout = QVBoxLayout()
        self.layout.setContentsMargins(10, 10, 10, 10)
        self.layout.setAlignment(Qt.AlignTop) 
        # w.setMinimumSize(500,1000)   # 设置显示部件的绝对大小
        w.setLayout(self.layout)


    def add(self, text, color, number):
        label = QLabel(self.tr(text))
        label.setStyleSheet("font-weight: bold;")

        progressbar=QProgressBar()
        progressbar.setValue(number)
        style = """
                QProgressBar {
                    border: 2px solid grey;
                    border-radius: 5px;
                    text-align: center;
                }
                QProgressBar::chunk {
                    background-color: #%s;
                    width: 20px;
                }""" % color
        progressbar.setStyleSheet(style)

        self.layout.addWidget(label)
        self.layout.addWidget(progressbar)


if __name__  == '__main__':
    app = QApplication(sys.argv)
    progress = BaseProgressDialog()

    blue, green = '88B0EB', '37DA7E'
    for i in range(5):
        progress.add('下载',green, random.randint(0,100))
    for j in range(5):   
        progress.add('上传',blue, random.randint(0,100))

    progress.show()
    sys.exit(app.exec_())