Shutdown VM, ListUserFiles added. Able to parse units included in specs

specs_parser.py

@@ -0,0 +1,25 @@
+import bitmath
+
+class SpecsParser(object):
+    def __init__(self, exceptional_devices, allowed_unit = 10):
+        self.exceptional_devices = exceptional_devices
+        self.allowed_unit = allowed_unit
+
+    def transform_specs(self, specs):
+        try:
+            for device in filter(lambda x: x not in self.exceptional_devices, specs):
+                parsed = bitmath.parse_string_unsafe(specs[device])
+                if parsed.base != self.allowed_unit:
+                    return False
+                specs[device] = int(parsed.to_Byte())
+            return True
+        except ValueError as _:
+            return False
+
+    def get_allowed_units(self):
+        if self.allowed_unit == 10:
+            unit_prefix = bitmath.SI_PREFIXES
+        else:
+            unit_prefix = bitmath.NIST_PREFIXES
+
+        return list(map(lambda u: u.upper() + "B", unit_prefix))