text: from __future__ import absolute_import
  
  import re
  
  try:
      import yaml
  except ImportError:
      YAML_AVAILABLE = False
  else:
      YAML_AVAILABLE = True
  
  from django.utils.translation import ugettext_lazy as _
  
  FIXTURE_TYPE_JSON = 'json'
  FIXTURE_TYPE_YAML = 'yaml'
  FIXTURE_TYPE_BETTER_YAML = 'better_yaml'
  FIXTURE_TYPE_XML = 'xml'
  
  FIXTURE_TYPES_CHOICES = (
      (FIXTURE_TYPE_JSON, _(u'JSON')),
      # Disabing XML until a way to specify a null pk is found
      # (FIXTURE_TYPE_XML, _(u'XML')),
  )
  
  FIXTURE_FILE_TYPE = {
      FIXTURE_TYPE_JSON: 'json',
      FIXTURE_TYPE_YAML: 'yaml',
      FIXTURE_TYPE_BETTER_YAML: 'better_yaml',
      FIXTURE_TYPE_XML: 'xml',
  }
  
  FIXTURE_TYPE_PK_NULLIFIER = {
      FIXTURE_TYPE_JSON: lambda x: re.sub('"pk": [0-9]{1,5}', '"pk": null', x),
      FIXTURE_TYPE_YAML: lambda x: re.sub('pk: [0-9]{1,5}', 'pk: null', x),
      FIXTURE_TYPE_BETTER_YAML: lambda x: re.sub('[0-9]{1,5}:', 'null:', x),
      FIXTURE_TYPE_XML: lambda x: re.sub('pk="[0-9]{1,5}"', 'pk=null', x),
  }
  
  FIXTURE_TYPE_EMPTY_FIXTURE = {
      FIXTURE_TYPE_JSON: lambda x: x.startswith('[]') or x == ',',
      FIXTURE_TYPE_YAML: lambda x: x.startswith('[]'),
      FIXTURE_TYPE_BETTER_YAML: lambda x: x.startswith('{}'),
      FIXTURE_TYPE_XML: lambda x: x,
  }
  
  FIXTURE_TYPE_MODEL_PROCESS = {
      FIXTURE_TYPE_JSON: lambda x: '%s,' % x[2:-2],
      FIXTURE_TYPE_YAML: lambda x: x,
      FIXTURE_TYPE_BETTER_YAML: lambda x: x,
      FIXTURE_TYPE_XML: lambda x: x,
  }
  
  FIXTURE_TYPE_FIXTURE_PROCESS = {
      FIXTURE_TYPE_JSON: lambda x: '[\n%s\n]' % x[:-1],  # Enclose in [], remove last comma
      FIXTURE_TYPE_YAML: lambda x: x,
      FIXTURE_TYPE_BETTER_YAML: lambda x: x,
      FIXTURE_TYPE_XML: lambda x: x,
  }
  
  COMMAND_LOADDATA = 'loaddata'
  
  if YAML_AVAILABLE:
      FIXTURE_TYPES_CHOICES += (FIXTURE_TYPE_YAML, _(u'YAML')),
      FIXTURE_TYPES_CHOICES += (FIXTURE_TYPE_BETTER_YAML, _(u'Better YAML')),
      # better_yaml is not working with natural keys
  
  BOOTSTRAP_EXTENSION = 'txt'
  BOOTSTRAP_REPOSITORY_INDEX_FILE = '_repo_index.txt'
  BOOTSTRAP_REPOSITORY_URL = 'http://bootstrap.mayan-edms.com'
  BOOTSTRAP_SETUP_MAGIC_NUMBER = 'bootstrap setup'
  DATETIME_STRING_FORMAT = '%a, %d %b %Y %H:%M:%S +0000'
  FIXTURE_METADATA_CREATED = 'created'
  FIXTURE_METADATA_DESCRIPTION = 'description'
  FIXTURE_METADATA_EDITED = 'edited'
  FIXTURE_METADATA_FORMAT = 'format'
  FIXTURE_METADATA_MAYAN_VERSION = 'mayan_edms_version'
  FIXTURE_METADATA_NAME = 'name'
  FIXTURE_METADATA_REMARK_CHARACTER = '#'
  FIXTURE_METADATA_SLUG = 'slug'
  