1 # (c) 2005 Ian Bicking and contributors; written for Paste (http://pythonpaste.org) 2 # Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php 3 4 import sys 5 import os 6 7 def find_package(dir): 8 """ 9 Given a directory, finds the equivalent package name. If it 10 is directly in sys.path, returns ''. 11 """ 12 dir = os.path.abspath(dir) 13 orig_dir = dir 14 path = map(os.path.abspath, sys.path) 15 packages = [] 16 last_dir = None 17 while 1: 18 if dir in path: 19 return '.'.join(packages) 20 packages.insert(0, os.path.basename(dir)) 21 dir = os.path.dirname(dir) 22 if last_dir == dir: 23 raise ValueError( 24 "%s is not under any path found in sys.path" % orig_dir) 25 last_dir = dir 26 27
