Rename copy_ to copy_one

setup.py

@@ -74,7 +74,7 @@ setup(name='nilmtools',
               'nilm-decimate = nilmtools.decimate:main',
               'nilm-decimate-auto = nilmtools.decimate_auto:main',
               'nilm-insert = nilmtools.insert:main',
-              'nilm-copy = nilmtools.copy_:main',
+              'nilm-copy = nilmtools.copy_one:main',
               'nilm-sinefit = nilmtools.sinefit:main',
               ],
           },

src/copy_.py → src/copy_one.py

@@ -1,5 +1,8 @@
 #!/usr/bin/python
 
+# This is called copy_one instead of copy to avoid name conflicts with
+# the Python standard library.
+
 import nilmtools.filter
 import nilmdb.client
 import numpy as np