Python 将 SQL 数据类型图像转换为 Python PyQt4 QPixmap 并在 GUI 上显示

Question

我正在尝试在Python PyQt4 GUI中显示来自SQL数据库的图像，实际上数据是通过套接字从.Net传递到Raspberry PI，在这里它应该显示为图像。我尝试了很多方法，例如将该字符串转换为 base64，但这对我不起作用。

由于我是 Python 新手，我尝试了很多 stackoverflow 问题及其答案，但没有一个解决我的问题。我在字符串的开头有 0x ，我删除了该字符串以获得 ByteArray，这导致我得到一个字节数组。

这是我正在尝试的代码:

import sys,io, os
from PyQt4.QtGui import *
from PyQt4.QtCore import *
from PIL import Image
import base64

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data = bytearray.fromhex(imgbytes)

print data

#creating window
app = QApplication(sys.argv)
w = QWidget()
w.setWindowTitle("Python Image from Base 64")

#creating widget
label = QLabel(w)
qp = QPixmap.loadFromData(data)
label.setPixmap(qp)
w.resize(500, 500)

#showing
w.show()
app.exec_()

您的任何帮助都将非常感激。谢谢!

Answer 1

您必须创建一个 QPixmap 对象，然后调用 loadFromData() 方法:

import sys

from PyQt4 import QtCore, QtGui


if __name__ == "__main__":

    app = QtGui.QApplication(sys.argv)

    imgbytes = 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    data = bytearray.fromhex(imgbytes)
    print(data)
    qp = QtGui.QPixmap() # create QPixmap object
    qp.loadFromData(data)

    w = QtGui.QWidget()
    w.setWindowTitle("Python Image from Base 64")
    label = QtGui.QLabel(alignment=QtCore.Qt.AlignCenter)
    label.setPixmap(qp)
    lay = QtGui.QVBoxLayout(w)
    lay.addWidget(label)
    w.resize(500, 500)
    w.show()

    sys.exit(app.exec_())

注意:格式不是 base64，而是 PNG 的原始数据。