PyQt5 QtWidgets Modülü Bulunamıyor

Traceback (most recent call last):
  File "c:\Users\PC\Desktop\KodlamaEgzersizleri\PyQt5\ders1.py", line 2, in <module>
    from PyQt5 import QtWidgets
ImportError: DLL load failed while importing QtWidgets: Belirtilen yordam bulunamadı.

import sys
from PyQt5 import QtWidgets

def Pencere():
 
    app = QtWidgets.QApplication(sys.argv)
    pencere = QtWidgets.QWidget()
    pencere = setWindowTitle("PyQt5 Ders 1")
    pencere.show()
    sys.exit(app.exec_())

Pencere()

pip install pyqt5