abstract file class with multi platform opening method

classes/file.py

@@ -1,7 +1,25 @@
-
+from sys import platform
 import os
+from subprocess import call
+# from os import path  # path.exists() may used in future.. may be..
 
 class File():
   def __init__(self, path):
-    # os.open(path,
-    pass
+    self._path = path
+
+  def write_bytes(self, bytes):
+    '''  truncates the file and create new with contents :param bytes '''
+    with open(self._path, 'r+b') as file:
+      file.write(bytes)
+
+  def read_bytes(self):
+    ''' read the file as bytes '''
+    # buf = b''
+    with open(self._path, 'r+b') as file:
+      return file.read()  # is this safe?
+      # buf = file.read()
+    # return buf
+
+  def open(self):
+    '''tries to open with os default viewer'''
+    call(('cmd /c start "" "'+ self._path +'"')if os.name is 'nt' else ('open' if platform.startswith('darwin') else 'xdg-open', self._path))