Add mlp trainer for watershed masker

bob/bio/vein/script/validate.py

+#!/usr/bin/env python
+# vim: set fileencoding=utf-8 :
+
+
+'''Utilities for command-line option validation'''
+
+
+import os
+import glob
+import schema
+import logging
+logger = logging.getLogger(__name__)
+
+
+def setup_logger(name, level):
+  '''Sets up and checks a verbosity level respects min and max boundaries
+
+
+  Parameters:
+
+    name (str): The name of the logger to setup
+
+    v (int): A value indicating the verbosity that must be set
+
+
+  Returns:
+
+    logging.Logger: A standard Python logger that can be used to log messages
+
+
+  Raises:
+
+    schema.SchemaError: If the verbosity level exceeds the maximum allowed of 4
+
+  '''
+
+  import bob.core
+  logger = bob.core.log.setup(name)
+
+  if not (0 <= level < 4):
+    raise schema.SchemaError("there can be only up to 3 -v's in a command-line")
+
+  # Sets-up logging
+  bob.core.log.set_verbosity_level(logger, level)
+
+  return logger
+
+
+def make_dir(p):
+  '''Checks if a path exists, if it doesn't, creates it
+
+
+  Parameters:
+
+    p (str): The path to check
+
+
+  Returns
+
+    bool: ``True``, always
+
+  '''
+
+  if not os.path.exists(p):
+    logger.info("Creating directory `%s'...", p)
+    os.makedirs(p)
+
+  return True
+
+
+def check_path_does_not_exist(p):
+  '''Checks if a path exists, if it does, raises an exception
+
+
+  Parameters:
+
+    p (str): The path to check
+
+
+  Returns:
+
+    bool: ``True``, always
+
+
+  Raises:
+
+    schema.SchemaError: if the path exists
+
+  '''
+
+  if os.path.exists(p):
+    raise schema.SchemaError("path to {} exists".format(p))
+
+  return True
+
+
+def check_path_exists(p):
+  '''Checks if a path exists, if it doesn't, raises an exception
+
+
+  Parameters:
+
+    p (str): The path to check
+
+
+  Returns:
+
+    bool: ``True``, always
+
+
+  Raises:
+
+    schema.SchemaError: if the path doesn't exist
+
+  '''
+
+  if not os.path.exists(p):
+    raise schema.SchemaError("path to {} does not exist".format(p))
+
+  return True
+
+
+def check_model_does_not_exist(p):
+  '''Checks if the path to any potential model file does not exist
+
+
+  Parameters:
+
+    p (str): The path to check
+
+
+  Returns:
+
+    bool: ``True``, always
+
+
+  Raises:
+
+    schema.SchemaError: if the path exists
+
+  '''
+
+  files = glob.glob(p + '.*')
+  if files:
+    raise schema.SchemaError("{} already exists".format(files))
+
+  return True
+
+
+def open_multipage_pdf_file(s):
+  '''Returns an opened matplotlib multi-page file
+
+
+  Parameters:
+
+    p (str): The path to the file to open
+
+
+  Returns:
+
+    matplotlib.backends.backend_pdf.PdfPages: with the handle to the multipage
+    PDF file
+
+
+  Raises:
+
+    schema.SchemaError: if the path exists
+
+  '''
+  import matplotlib.pyplot as mpl
+  from matplotlib.backends.backend_pdf import PdfPages
+  return PdfPages(s)