Change module of internal references to to_native_str()

requests/auth.py

@@ -17,7 +17,8 @@ from base64 import b64encode
 
 from .compat import urlparse, str
 from .cookies import extract_cookies_to_jar
-from .utils import parse_dict_header, to_native_string
+from ._internal_utils import to_native_string
+from .utils import parse_dict_header
 from .status_codes import codes
 
 CONTENT_TYPE_FORM_URLENCODED = 'application/x-www-form-urlencoded'

requests/models.py

@@ -29,11 +29,11 @@ from .packages.urllib3.exceptions import (
 from .exceptions import (
     HTTPError, MissingSchema, InvalidURL, ChunkedEncodingError,
     ContentDecodingError, ConnectionError, StreamConsumedError)
+from ._internal_utils import to_native_string
 from .utils import (
     guess_filename, get_auth_from_url, requote_uri,
     stream_decode_response_unicode, to_key_val_list, parse_header_links,
-    iter_slices, guess_json_utf, super_len, to_native_string,
-    check_header_validity)
+    iter_slices, guess_json_utf, super_len, check_header_validity)
 from .compat import (
     cookielib, urlunparse, urlsplit, urlencode, str, bytes, StringIO,
     is_py2, chardet, builtin_str, basestring)

requests/sessions.py

@@ -17,7 +17,8 @@ from .cookies import (
     cookiejar_from_dict, extract_cookies_to_jar, RequestsCookieJar, merge_cookies)
 from .models import Request, PreparedRequest, DEFAULT_REDIRECT_LIMIT
 from .hooks import default_hooks, dispatch_hook
-from .utils import to_key_val_list, default_headers, to_native_string
+from ._internal_utils import to_native_string
+from .utils import to_key_val_list, default_headers
 from .exceptions import (
     TooManyRedirects, InvalidSchema, ChunkedEncodingError, ContentDecodingError)
 from .packages.urllib3._collections import RecentlyUsedContainer