由于psycopg2错误导致无法运行pServe

Question

由于以下错误，我无法运行pserve：

File "/usr/local/lib/python2.7/site-packages/psycopg2/__init__.py", line 50, in <module>
    from psycopg2._psycopg import BINARY, NUMBER, STRING, DATETIME, ROWID
ImportError: dlopen(/usr/local/lib/python2.7/site-packages/psycopg2/_psycopg.so, 2): Library not loaded: libpq.5.dylib
  Referenced from: /usr/local/lib/python2.7/site-packages/psycopg2/_psycopg.so
  Reason: image not found

我在OSX 10.6上