Refactor stages 1, 2 and test_api overhaul.

scripts/slave/recipe_modules/auto_bisect/resources/significantly_different.py

-"""Launches an anaconda environment to run some scipy hypothesis tests."""
-
-import json
-import os
-import subprocess
-import sys
-
-class ScipyNotInstalledError(Exception):
-  pass
-
-def main(argv, anaconda_path=None):
-  _, list_a, list_b, significance  = argv
-
-  # Do not even test if there's a single repeated value on both samples.
-  if len(set(json.loads(list_a) + json.loads(list_b))) == 1:
-    return {
-        'first_sample': json.loads(list_a),
-        'second_sample': json.loads(list_b),
-        'mann_p_value': None,
-        'anderson_p_value': None,
-        'welch_p_value': None,
-        'normal-y': None,
-        'significantly_different': False
-    }
-
-  if not anaconda_path:
-    if os.name == 'nt':
-      anaconda_path = r'c:\conda-py-scientific\python.exe'
-    else:
-      anaconda_path = '/opt/conda-py-scientific/bin/python'
-  if not os.path.exists(anaconda_path):
-    raise ScipyNotInstalledError()
-
-  inner_script_location = os.path.join(os.path.dirname(os.path.realpath(
-      __file__)), 'significantly_different_inner.py')
-
-  conda_environ = dict(os.environ)
-  del conda_environ["PYTHONPATH"]
-
-  return json.loads(subprocess.check_output(
-      [anaconda_path, inner_script_location,list_a, list_b, significance],
-      env=conda_environ))
-
-if __name__ == '__main__':
-  result = main(sys.argv)
-  if result:
-    print json.dumps(result, indent=4)
-    sys.exit(0)
-  sys.exit(1)