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 Database 的图像，实际上数据是通过套接字从 .Net 传递到 Raspberry PI，这里应该显示作为图像。我尝试了很多方法，比如将该字符串转换为 base64，但这对我不起作用。

由于我是 Python 的新手，我尝试了很多 Whosebug 问题及其答案，但其中 none 解决了我的问题。我在字符串的开头有 0x，我将其删除以获取 ByteArray，结果是一个 bytearray。

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_()

如果您能提供任何帮助，我们将不胜感激。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。

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

Python Convert SQL DataType Image to Python PyQt4 QPixmap and Show it on GUI

python

pyqt4

python-2.7