QNetworkAccessManager https UnknownNetworkError when using pyside2

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ma432225568 | 2020-07-23 17:22:04 UTC | #1

Hello, I'm using the QNetworkAccessManager module and it works fine with HTTP requests, but when I try to do https requests it fails and returns "PySide2.QtNetwork.QNetworkReply.NetworkError.UnknownNetworkError: TLS initialization failed" this problem only happens with pyside2 on windows. but it works fine on Mac os. when I used the same piece of code with pyqt5 it worked just fine on both Windows and Mac os. https requests: 1.pyside2 on windows: fails 2.pyside2 on mac: works fine 3. pyqt5 on windows: works fine 4. pyqt5 on mac: works fine and I'm stuck with it for a while and can't seem to find the problem.

from PySide2 import QtNetwork from PySide2 import QtCore import sys, json

class Example:

python
def __init__(self):
    self.nam = QtNetwork.QNetworkAccessManager()
    self.nam.finished.connect(self.handle_response)

def do_request(self):
    url = 'https://httpbin.org/get'
    req = QtNetwork.QNetworkRequest(QtCore.QUrl(url))
    self.nam.get(req)

def handle_response(self, reply):
    er = reply.error()
    if er == QtNetwork.QNetworkReply.NoError:
        bytes_string = reply.readAll()
        print(str(bytes_string, 'utf-8'))
    else:
        print(f'Error occurred: {er}: {reply.errorString()}')
    QtCore.QCoreApplication.quit()

def main(): app = QtCore.QCoreApplication([]) ex = Example() ex.do_request() sys.exit(app.exec_())

if name == 'main': main()

I'm using python 3.7 and pyside2 5.15

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More info Get the book

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QNetworkAccessManager https UnknownNetworkError when using pyside2 was written by Martin Fitzpatrick .

Martin Fitzpatrick has been developing Python/Qt apps for 8 years. Building desktop applications to make data-analysis tools more user-friendly, Python was the obvious choice. Starting with Tk, later moving to wxWidgets and finally adopting PyQt.