old_contents: # -*- coding: utf-8 -*-
  from collections import Callable
  from datetime import datetime, timedelta, tzinfo
  from requests.compat import basestring
  import re
  
  # with thanks to https://code.google.com/p/jquery-localtime/issues/detail?id=4
  ISO_8601 = re.compile("^(-?(?:[1-9][0-9]*)?[0-9]{4})-(1[0-2]|0[1-9])-(3[0-1]|0"
                        "[1-9]|[1-2][0-9])(T(2[0-3]|[0-1][0-9]):([0-5][0-9]):([0"
                        "-5][0-9])(\.[0-9]+)?(Z|[+-](?:2[0-3]|[0-1][0-9]):[0-5]["
                        "0-9])?)?$")
  
  
  def timestamp_parameter(timestamp, allow_none=True):
  
      if timestamp is None:
          if allow_none:
              return None
          raise ValueError("Timestamp value cannot be None")
  
      if isinstance(timestamp, datetime):
          return timestamp.isoformat()
  
      if isinstance(timestamp, basestring):
          if not ISO_8601.match(timestamp):
              raise ValueError(("Invalid timestamp: %s is not a valid ISO-8601"
                                " formatted date") % timestamp)
          return timestamp
  
      raise ValueError("Cannot accept type %s for timestamp" % type(timestamp))
  
  
  class UTC(tzinfo):
      """Yet another UTC reimplementation, to avoid a dependency on pytz or
      dateutil."""
  
      _ZERO = timedelta(0)
  
      def __repr__(self):
          return 'UTC()'
  
      def dst(self, dt):
          return self._ZERO
  
      def tzname(self, dt):
          return 'UTC'
  
      def utcoffset(self, dt):
          return self._ZERO
  
  
  def stream_response_to_file(response, path=None):
      pre_opened = False
      fd = None
      if path:
          if isinstance(getattr(path, 'write', None), Callable):
              pre_opened = True
              fd = path
          else:
              fd = open(path, 'wb')
      else:
          header = response.headers['content-disposition']
          i = header.find('filename=') + len('filename=')
          fd = open(header[i:], 'wb')
  
      for chunk in response.iter_content(chunk_size=512):
          fd.write(chunk)
  
      if not pre_opened:
          fd.close()
  
new_contents: # -*- coding: utf-8 -*-
  from collections import Callable
  from datetime import datetime, timedelta, tzinfo
  from requests.compat import basestring
  import re
  
  # with thanks to https://code.google.com/p/jquery-localtime/issues/detail?id=4
  ISO_8601 = re.compile("^(-?(?:[1-9][0-9]*)?[0-9]{4})-(1[0-2]|0[1-9])-(3[0-1]|0"
                        "[1-9]|[1-2][0-9])(T(2[0-3]|[0-1][0-9]):([0-5][0-9]):([0"
                        "-5][0-9])(\.[0-9]+)?(Z|[+-](?:2[0-3]|[0-1][0-9]):[0-5]["
                        "0-9])?)?$")
  
  
  def timestamp_parameter(timestamp, allow_none=True):
  
      if timestamp is None:
          if allow_none:
              return None
          raise ValueError("Timestamp value cannot be None")
  
      if isinstance(timestamp, datetime):
          return timestamp.isoformat()
  
      if isinstance(timestamp, basestring):
          if not ISO_8601.match(timestamp):
              raise ValueError(("Invalid timestamp: %s is not a valid ISO-8601"
                                " formatted date") % timestamp)
          return timestamp
  
      raise ValueError("Cannot accept type %s for timestamp" % type(timestamp))
  
  
  class UTC(tzinfo):
      """Yet another UTC reimplementation, to avoid a dependency on pytz or
      dateutil."""
  
      ZERO = timedelta(0)
  
      def __repr__(self):
          return 'UTC()'
  
      def dst(self, dt):
          return self.ZERO
  
      def tzname(self, dt):
          return 'UTC'
  
      def utcoffset(self, dt):
          return self.ZERO
  
  
  def stream_response_to_file(response, path=None):
      pre_opened = False
      fd = None
      if path:
          if isinstance(getattr(path, 'write', None), Callable):
              pre_opened = True
              fd = path
          else:
              fd = open(path, 'wb')
      else:
          header = response.headers['content-disposition']
          i = header.find('filename=') + len('filename=')
          fd = open(header[i:], 'wb')
  
      for chunk in response.iter_content(chunk_size=512):
          fd.write(chunk)
  
      if not pre_opened:
          fd.close()
  
subject: Drop leading underscore from UTC._ZERO