how to change cwd with lineEdit input in pyqt5 - python-3.x

Question

I want to change the cwd with a lineEdit input
basically type in the new path and changethe cwd with click on the button
# widgets
self.speicherort_input = qtw.QLineEdit()
self.speicherort_button = qtw.QPushButton("Speicherort_bestaetigen")
# signal
self.speicherort_button.clicked.connect(self.set_newpath)
# function
def set_newpath(self):
neuer_speicherort = self.speicherort_input.text()
os.system('cd' + neuer_speicherort) # how to change variable to raw string ?
how can I change the input string into a raw string to change the cwd ?
I changed the function to convert the lineEditt_input into a raw string
neuer_speicherort = self.speicherort_input.text()
raw_string = r"{}".format(neuer_speicherort)
os.chdir(raw_string)
but the command did not get executed

Answer 1

Tru it
import sys
import os
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtCore as qtc
from PyQt5 import QtGui as qtg
class MainWindow(qtw.QWidget):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.resize(700, 410)
speicherort_label = qtw.QLabel("welcher Speicherort")
self.speicherort_input = qtw.QLineEdit()
self.speicherort_button = qtw.QPushButton("Speicherort_bestaetigen")
self.check_cwd_button = qtw.QPushButton("Check cwd")
layout1 = qtw.QFormLayout()
self.setLayout(layout1)
layout2 = qtw.QHBoxLayout()
layout2.addWidget(self.speicherort_input)
layout2.addWidget(self.speicherort_button)
layout1.addRow(speicherort_label, layout2)
layout1.addRow(self.check_cwd_button)
self.show()
# funktionen
self.speicherort_button.clicked.connect(self.changecwd)
self.check_cwd_button.clicked.connect(self.printcwd)
def changecwd(self):
neuer_speicherort = self.speicherort_input.text()
# raw_string = r"{}".format(neuer_speicherort)
# new_process = qtc.QProcess()
# new_process.setWorkingDirectory(raw_string)
os.chdir(neuer_speicherort) # +++
def printcwd(self):
print(os.getcwd())
if __name__ == '__main__':
app = qtw.QApplication(sys.argv)
w = MainWindow()
sys.exit(app.exec_())