fixed: load error due to new magic.mgc file

* load system installed version (/usr/share/file/magic.mgc) of magic.mgc
on linux systems

Author: kaotika

pandasqt/encoding.py

@@ -13,24 +13,28 @@
     import magic
     AUTODETECT = True
 except ImportError, e:
-    if sys.platform == 'darwin':
-        raise ImportError('Please install libmagic')
+    #if sys.platform == 'darwin':
+    raise ImportError('Please install libmagic')
     AUTODETECT = False
 
 
 class Detector(object):
+
     def __init__(self):
         if AUTODETECT:
-            magic_db = os.path.join(BASEDIR, '_lib', 'magic', 'db', 'magic.mgc')
+            if sys.platform.startswith('linux'):
+                # use the system wide installed version comming with windows, the included magic.mgc might be incompatible
+                magic_db = os.path.join('/usr/share/file', 'magic.mgc')
+            else:
+                magic_db = os.path.join(BASEDIR, '_lib', 'magic', 'db', 'magic.mgc')
+            if not os.path.exists(magic_db):
+                raise ImportError('Please install libmagic.')
             self.magic = magic.Magic(magic_file=magic_db, mime_encoding=True)
         else:
             self.magic = False
 
-
     def detect(self, filepath):
         if self.magic:
             encoding = self.magic.from_file(filepath)
             return encoding
-        return None
-
-
+        return None