Added ability to print from a generic file

escpos/printer.py

@@ -128,9 +128,40 @@ class Network(Escpos):
 
 
     def _raw(self, msg):
+        """ Print any command sent in raw format """
         self.device.send(msg)
 
 
     def __del__(self):
         """ Close TCP connection """
         self.device.close()
+
+
+
+class File(Escpos):
+    """ Define Generic file printer """
+
+    def __init__(self, devfile="/dev/usb/lp0"):
+        """
+        @param devfile : Device file under dev filesystem
+        """
+        self.devfile = devfile
+        self.open()
+
+
+    def open(self):
+        """ Open system file """
+	self.device = open(self.devfile, "wb")
+
+        if self.device is None:
+            print "Could not open the specified file %s" % self.devfile
+
+
+    def _raw(self, msg):
+        """ Print any command sent in raw format """
+        self.device.write(msg);
+
+
+    def __del__(self):
+        """ Close system file """
+        self.device.close()