diff options
Diffstat (limited to 'pyanidb/hash.py')
| -rw-r--r-- | pyanidb/hash.py | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/pyanidb/hash.py b/pyanidb/hash.py index a748f9e..4aab45f 100644 --- a/pyanidb/hash.py +++ b/pyanidb/hash.py @@ -12,7 +12,7 @@ class File: self.cached = False if cache: self.read_cache() - if sum([not hasattr(self, a) for a in algorithms]): + if False in [hasattr(self, a) for a in algorithms]: self.cached = False h = multihash.hash_file(name, algorithms) for a in algorithms: @@ -20,6 +20,8 @@ class File: self.write_cache() def read_cache(self): + if not xattr: + return cache = dict([(n[13:], xattr.getxattr(self.name, n)) for n in xattr.listxattr(self.name) if n.startswith('user.pyanidb.')]) if 'mtime' not in cache or str(int(self.mtime)) != cache.pop('mtime'): return @@ -28,6 +30,8 @@ class File: self.cached = True def write_cache(self): + if not xattr: + return try: self.clear_cache() xattr.setxattr(self.name, 'user.pyanidb.mtime', str(int(self.mtime))) |