refactor IO code to new folder

Author: Ehsan Totoni

hpat/__init__.py

@@ -19,14 +19,15 @@
 from hpat.utils import cprint, distribution_report
 import hpat.compiler
 import hpat.io
+import hpat.io.np_io
 import hpat.hiframes.pd_timestamp_ext
 import hpat.hiframes.boxing
 import hpat.config
 import hpat.timsort
 from hpat.decorators import jit
 
 if hpat.config._has_xenon:
-    from hpat.xenon_ext import read_xenon, xe_connect, xe_open, xe_close
+    from hpat.io.xenon_ext import read_xenon, xe_connect, xe_open, xe_close
 
 multithread_mode = False
 

hpat/compiler.py

@@ -13,8 +13,9 @@
 from numba.ir_utils import guard, get_definition
 from numba.inline_closurecall import inline_closure_call, InlineClosureCallPass
 from hpat import config
+import hpat.io
 if config._has_h5py:
-    from hpat import pio
+    from hpat.io import pio
 
 # workaround for Numba #3876 issue with large labels in mortgage benchmark
 from llvmlite import binding

hpat/compiler.py.orig

@@ -33,4 +33,4 @@
     _has_xenon = False
 else:
     _has_xenon = True
-    import hpat.xenon_ext
+    import hpat.io.xenon_ext