Rename all tests from "pytest_" to "test_", including data directories

ren_pytest_prefix.py

import os
import fnmatch
import sys


directory = sys.argv[1]
for root, dirs, names in os.walk(sys.argv[1]):
    for name in names:
        if fnmatch.fnmatch(name, 'pytest_*.py') and os.path.basename(root) == '_tests':
            source = os.path.join(root, name)
            target = os.path.join(root, name[2:])
            if not os.path.isfile(target):
                data_dir = os.path.splitext(source)[0]
                if os.path.isdir(data_dir):
                    dir_name = os.path.basename(data_dir)[2:]
                    target_dir = os.path.join(os.path.dirname(data_dir), dir_name)
                    os.rename(data_dir, target_dir)
                subprocess.call('git mv %s %s' % (source, target))
            else:
                print '***', target, 'already exists: merge the two tests'