fixed reg.exp. string as raw (for windows compatibility)

mcpha.py

@@ -98,7 +98,7 @@ class MCPHA(QMainWindow, Ui_MCPHA):
             self.rateValue.setItemData(i, Qt.AlignRight, Qt.TextAlignmentRole)
         self.rateValue.setCurrentIndex(1)
         self.rateValue.currentIndexChanged.connect(self.set_rate)
-        rx = QRegExp("^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])|rp-[0-9A-Fa-f]{6}\.local$")
+        rx = QRegExp(r"^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])|rp-[0-9A-Fa-f]{6}\.local$")
         self.addrValue.setValidator(QRegExpValidator(rx, self.addrValue))
         # create TCP socket
         self.socket = QTcpSocket(self)