* Added some useful functions from my pw2g_bench_MnO.py scriptlet collection:

- wpylib.math.roundup()
  - wpylib.shell_tools.dirname2()

* file_exists_nonempty() is moved to wpylib.shell_tools.

file/file_utils.py

@@ -81,10 +81,6 @@ def open_input_file(fname, superize=0):
 
 # Miscellaneous functions
 
-def file_exists_nonempty(fn):
-  return os.path.isfile(fn) and os.stat(fn).st_size > 0
-
-
 
 def glob_files(filespec):
   '''Processes a glob string, or does nothing (pass-on only) if an iterable object

math/__init__.py

@@ -42,3 +42,10 @@ def epsilon(dtype):
     small2 = small
     small = dtype(small / 2)
   return small2
+
+
+def roundup(value, unit):
+  """Rounds up a value to the next integer multiple of a unit."""
+  return numpy.ceil(float(value) / float(unit)) * unit
+
+

shell_tools.py

@@ -26,6 +26,18 @@ def mcd(subdir):
   mkdir("-p", subdir)
   os.chdir(subdir)
 
+def dirname2(path):
+  """Returns the directory part of a path.
+  The difference from os.path.dirname is that if the directory
+  part is empty, it is converted to '.' (the current directory)."""
+  d = os.path.dirname(path)
+  if d == '': d = '.'
+  return d
+
+def file_exists_nonempty(path):
+  """Determines whether a given path is a regular file of
+  nonzero size."""
+  return os.path.isfile(path) and os.stat(path).st_size > 0
 
 def provide_link(dest, src):
   """Checks if file `dest' exists. If it does not, provide for it by means