don't use nbformat.current in IPython.html

use top-level nbformat.read/write, v4 directly for compose

IPython/html/nbconvert/handlers.py

@@ -13,7 +13,7 b' from ..base.handlers import ('
     IPythonHandler, FilesRedirectHandler,
     notebook_path_regex, path_regex,
 )
-from IPython.nbformat.current import from_dict
+from IPython.nbformat import from_dict
 
 from IPython.utils.py3compat import cast_bytes
 

IPython/html/nbconvert/tests/test_nbconvert_handlers.py

@@ -10,9 +10,10 b' import requests'
 
 from IPython.html.utils import url_path_join
 from IPython.html.tests.launchnotebook import NotebookTestBase, assert_http_error
-from IPython.nbformat.current import (new_notebook, write,
-                                      new_markdown_cell, new_code_cell,
-                                      new_output)
+from IPython.nbformat import write
+from IPython.nbformat.v4 import (
+    new_notebook, new_markdown_cell, new_code_cell, new_output,
+)
 
 from IPython.testing.decorators import onlyif_cmds_exist
 
@@ -66,7 +67,7 b' class APITest(NotebookTestBase):'
         
         with io.open(pjoin(nbdir, 'foo', 'testnb.ipynb'), 'w',
                      encoding='utf-8') as f:
-            write(nb, f)
+            write(f, nb, version=4)
 
         self.nbconvert_api = NbconvertAPI(self.base_url())
 

IPython/html/services/contents/filemanager.py

@@ -12,7 +12,7 b' import shutil'
 from tornado import web
 
 from .manager import ContentsManager
-from IPython.nbformat import current
+from IPython import nbformat
 from IPython.utils.io import atomic_writing
 from IPython.utils.path import ensure_dir_exists
 from IPython.utils.traitlets import Unicode, Bool, TraitError
@@ -253,7 +253,7 b' class FileContentsManager(ContentsManager):'
             os_path = self._get_os_path(name, path)
             with io.open(os_path, 'r', encoding='utf-8') as f:
                 try:
-                    nb = current.read(f, u'json')
+                    nb = nbformat.read(f, as_version=4)
                 except Exception as e:
                     raise web.HTTPError(400, u"Unreadable Notebook: %s %r" % (os_path, e))
             self.mark_trusted_cells(nb, name, path)
@@ -295,7 +295,7 b' class FileContentsManager(ContentsManager):'
     def _save_notebook(self, os_path, model, name='', path=''):
         """save a notebook file"""
         # Save the notebook file
-        nb = current.from_dict(model['content'])
+        nb = nbformat.from_dict(model['content'])
 
         self.check_and_sign(nb, name, path)
 
@@ -303,7 +303,7 b' class FileContentsManager(ContentsManager):'
             nb['metadata']['name'] = u''
 
         with atomic_writing(os_path, encoding='utf-8') as f:
-            current.write(nb, f, version=nb.nbformat)
+            nbformat.write(f, nb, version=nbformat.NO_CONVERT)
 
     def _save_file(self, os_path, model, name='', path=''):
         """save a non-notebook file"""
@@ -522,7 +522,7 b' class FileContentsManager(ContentsManager):'
         # ensure notebook is readable (never restore from an unreadable notebook)
         if cp_path.endswith('.ipynb'):
             with io.open(cp_path, 'r', encoding='utf-8') as f:
-                current.read(f, u'json')
+                nbformat.read(f, as_version=4)
         self._copy(cp_path, nb_path)
         self.log.debug("copying %s -> %s", cp_path, nb_path)
 

IPython/html/services/contents/manager.py

@@ -11,7 +11,8 b' import os'
 from tornado.web import HTTPError
 
 from IPython.config.configurable import LoggingConfigurable
-from IPython.nbformat import current, sign
+from IPython.nbformat import sign, validate, ValidationError
+from IPython.nbformat.v4 import new_notebook
 from IPython.utils.traitlets import Instance, Unicode, List
 
 
@@ -220,8 +221,8 b' class ContentsManager(LoggingConfigurable):'
     def validate_notebook_model(self, model):
         """Add failed-validation message to model"""
         try:
-            current.validate(model['content'])
-        except current.ValidationError as e:
+            validate(model['content'])
+        except ValidationError as e:
             model['message'] = 'Notebook Validation failed: {}:\n{}'.format(
                 e.message, json.dumps(e.instance, indent=1, default=lambda obj: '<UNKNOWN>'),
             )
@@ -234,7 +235,7 b' class ContentsManager(LoggingConfigurable):'
             model = {}
         if 'content' not in model and model.get('type', None) != 'directory':
             if ext == '.ipynb':
-                model['content'] = current.new_notebook()
+                model['content'] = new_notebook()
                 model['type'] = 'notebook'
                 model['format'] = 'json'
             else:
@@ -308,13 +309,14 b' class ContentsManager(LoggingConfigurable):'
         Parameters
         ----------
         nb : dict
-            The notebook object (in nbformat.current format)
+            The notebook object (in current nbformat)
         name : string
             The filename of the notebook (for logging)
         path : string
             The notebook's directory (for logging)
         """
-        if nb['nbformat'] != current.nbformat:
+        # can't sign old notebooks
+        if nb['nbformat'] != 4:
             return
         if self.notary.check_cells(nb):
             self.notary.sign(nb)
@@ -329,7 +331,7 b' class ContentsManager(LoggingConfigurable):'
         Parameters
         ----------
         nb : dict
-            The notebook object (in nbformat.current format)
+            The notebook object (in current nbformat)
         name : string
             The filename of the notebook (for logging)
         path : string

IPython/html/services/contents/tests/test_contents_api.py

@@ -14,9 +14,10 b' import requests'
 
 from IPython.html.utils import url_path_join, url_escape
 from IPython.html.tests.launchnotebook import NotebookTestBase, assert_http_error
-from IPython.nbformat import current
-from IPython.nbformat.current import (new_notebook, write, read,
-                                      new_markdown_cell, from_dict)
+from IPython.nbformat import read, write, from_dict
+from IPython.nbformat.v4 import (
+    new_notebook, new_markdown_cell,
+)
 from IPython.nbformat import v2
 from IPython.utils import py3compat
 from IPython.utils.data import uniq_stable
@@ -143,7 +144,7 b' class APITest(NotebookTestBase):'
             with io.open(pjoin(nbdir, d, '%s.ipynb' % name), 'w',
                          encoding='utf-8') as f:
                 nb = new_notebook()
-                write(nb, f, format='ipynb')
+                write(f, nb, version=4)
 
             # create a text file
             with io.open(pjoin(nbdir, d, '%s.txt' % name), 'w',
@@ -354,7 +355,7 b' class APITest(NotebookTestBase):'
         self._check_created(resp, u'Upload tést.ipynb', u'å b')
         resp = self.api.read(u'Upload tést.ipynb', u'å b')
         data = resp.json()
-        self.assertEqual(data['content']['nbformat'], current.nbformat)
+        self.assertEqual(data['content']['nbformat'], 4)
 
     def test_copy_untitled(self):
         resp = self.api.copy_untitled(u'ç d.ipynb', path=u'å b')
@@ -422,7 +423,7 b' class APITest(NotebookTestBase):'
 
         nbfile = pjoin(self.notebook_dir.name, 'foo', 'a.ipynb')
         with io.open(nbfile, 'r', encoding='utf-8') as f:
-            newnb = read(f, format='ipynb')
+            newnb = read(f, as_version=4)
         self.assertEqual(newnb.cells[0].source,
                          u'Created by test ³')
         nbcontent = self.api.read('a.ipynb', 'foo').json()['content']

IPython/html/services/contents/tests/test_manager.py

@@ -9,7 +9,7 b' from tornado.web import HTTPError'
 from unittest import TestCase
 from tempfile import NamedTemporaryFile
 
-from IPython.nbformat import current
+from IPython.nbformat import v4 as nbformat
 
 from IPython.utils.tempdir import TemporaryDirectory
 from IPython.utils.traitlets import TraitError
@@ -95,8 +95,8 b' class TestContentsManager(TestCase):'
         return os_path
 
     def add_code_cell(self, nb):
-        output = current.new_output("display_data", {'application/javascript': "alert('hi');"})
-        cell = current.new_code_cell("print('hi')", outputs=[output])
+        output = nbformat.new_output("display_data", {'application/javascript': "alert('hi');"})
+        cell = nbformat.new_code_cell("print('hi')", outputs=[output])
         nb.cells.append(cell)
 
     def new_notebook(self):

IPython/html/services/sessions/tests/test_sessions_api.py

@@ -11,7 +11,8 b' pjoin = os.path.join'
 
 from IPython.html.utils import url_path_join
 from IPython.html.tests.launchnotebook import NotebookTestBase, assert_http_error
-from IPython.nbformat.current import new_notebook, write
+from IPython.nbformat.v4 import new_notebook
+from IPython.nbformat import write
 
 class SessionAPI(object):
     """Wrapper for notebook API calls."""
@@ -63,7 +64,7 b' class SessionAPITest(NotebookTestBase):'
         with io.open(pjoin(nbdir, 'foo', 'nb1.ipynb'), 'w',
                      encoding='utf-8') as f:
             nb = new_notebook()
-            write(nb, f, format='ipynb')
+            write(f, nb, version=4)
 
         self.sess_api = SessionAPI(self.base_url())
 

IPython/html/tests/test_files.py

@@ -10,7 +10,8 b' pjoin = os.path.join'
 import requests
 import json
 
-from IPython.nbformat.current import (new_notebook, write,
+from IPython.nbformat import write
+from IPython.nbformat.v4 import (new_notebook,
                               new_markdown_cell, new_code_cell,
                               new_output)
 
@@ -73,7 +74,7 b' class FilesTest(NotebookTestBase):'
 
         with io.open(pjoin(nbdir, 'testnb.ipynb'), 'w', 
             encoding='utf-8') as f:
-            write(nb, f)
+            write(f, nb, version=4)
 
         with io.open(pjoin(nbdir, 'test.bin'), 'wb') as f:
             f.write(b'\xff' + os.urandom(5))