BLD: fix setup.py on py3 and py3-compatible relative imports

Author: wesm

pandas/__init__.py

@@ -7,9 +7,7 @@
 import numpy as np
 
 try:
-    import hashtable
-    import tslib
-    import lib
+    from . import hashtable, tslib, lib
 except Exception:  # pragma: no cover
     import sys
     e = sys.exc_info()[1] # Py25 and Py3 current exception syntax conflict

pandas/hashtable.pyx

@@ -18,7 +18,7 @@ cnp.import_ufunc()
 
 cdef int64_t iNaT = util.get_nat()
 
-import algos
+from . import algos
 
 cdef extern from "datetime.h":
     bint PyDateTime_Check(object o)

setup.py

@@ -597,7 +597,7 @@ def pxd(name):
 
 extensions = []
 
-for name, data in ext_data.iteritems():
+for name, data in ext_data.items():
     sources = [srcpath(data['pyxfile'], suffix=suffix, subdir='')]
     pxds = [pxd(x) for x in data.get('pxdfiles', [])]
     if suffix == '.pyx' and pxds: