Merge pull request #330 from om26er/windows-support

Enable Windows Support

AUTHORS

@@ -21,6 +21,7 @@ Michael Billington
 Michael Elsdörfer
 mrwunderbar666
 Nathan Bookham
+Omer Akram
 Patrick Kanzler
 primax79
 Qian Linfeng

src/escpos/printer.py

@@ -68,6 +68,11 @@ class Usb(Escpos):
         self.idVendor = self.device.idVendor
         self.idProduct = self.device.idProduct
 
+        # pyusb has three backends: libusb0, libusb1 and openusb but
+        # only libusb1 backend implements the methods is_kernel_driver_active()
+        # and detach_kernel_driver().
+        # This helps enable this library to work on Windows.
+        if self.device.backend.__module__.endswith("libusb1"):
             check_driver = None
 
             try: