Remove many deprecation and bump traitlets to 5+

Many old hooks from debugger removed,
We now are traitlets 5+

IPython/core/application.py

@@ -256,16 +256,6 b' class BaseIPythonApplication(Application):'
     # Various stages of Application creation
     #-------------------------------------------------------------------------
     
-    deprecated_subcommands = {}
-    
-    def initialize_subcommand(self, subc, argv=None):
-        if subc in self.deprecated_subcommands:
-            self.log.warning("Subcommand `ipython {sub}` is deprecated and will be removed "
-                             "in future versions.".format(sub=subc))
-            self.log.warning("You likely want to use `jupyter {sub}` in the "
-                             "future".format(sub=subc))
-        return super(BaseIPythonApplication, self).initialize_subcommand(subc, argv)
-
     def init_crash_handler(self):
         """Create a crash handler, typically setting sys.excepthook to it."""
         self.crash_handler = self.crash_handler_class(self)

IPython/core/debugger.py

@@ -144,22 +144,15 b' def BdbQuit_excepthook(et, ev, tb, excepthook=None):'
     All other exceptions are processed using the `excepthook`
     parameter.
     """
-    warnings.warn("`BdbQuit_excepthook` is deprecated since version 5.1",
-                  DeprecationWarning, stacklevel=2)
-    if et == bdb.BdbQuit:
-        print('Exiting Debugger.')
-    elif excepthook is not None:
-        excepthook(et, ev, tb)
-    else:
-        # Backwards compatibility. Raise deprecation warning?
-        BdbQuit_excepthook.excepthook_ori(et, ev, tb)
+    raise ValueError(
+        "`BdbQuit_excepthook` is deprecated since version 5.1",
+    )
 
 
 def BdbQuit_IPython_excepthook(self, et, ev, tb, tb_offset=None):
-    warnings.warn(
+    raise ValueError(
         "`BdbQuit_IPython_excepthook` is deprecated since version 5.1",
         DeprecationWarning, stacklevel=2)
-    print('Exiting Debugger.')
 
 
 RGX_EXTRA_INDENT = re.compile(r'(?<=\n)\s+')

IPython/core/formatters.py

@@ -835,11 +835,9 b' class JSONFormatter(BaseFormatter):'
             # unpack data, metadata tuple for type checking on first element
             r, md = r
         
-        # handle deprecated JSON-as-string form from IPython < 3
-        if isinstance(r, str):
-            warnings.warn("JSON expects JSONable list/dict containers, not JSON strings",
-            FormatterWarning)
-            r = json.loads(r)
+        assert not isinstance(
+            r, str
+        ), "JSON-as-string has been deprecated since IPython < 3"
         
         if md is not None:
             # put the tuple back together

IPython/core/interactiveshell.py

@@ -906,7 +906,11 b' class InteractiveShell(SingletonConfigurable):'
 
         if _warn_deprecated and (name in IPython.core.hooks.deprecated):
             alternative = IPython.core.hooks.deprecated[name]
-            warn("Hook {} is deprecated. Use {} instead.".format(name, alternative), stacklevel=2)
+            raise ValueError(
+                "Hook {} has been deprecated since IPython 5.0. Use {} instead.".format(
+                    name, alternative
+                )
+            )
 
         if not dp:
             dp = IPython.core.hooks.CommandChainDispatcher()
@@ -933,9 +937,10 b' class InteractiveShell(SingletonConfigurable):'
 
         Register a function for calling after code execution.
         """
-        warn("ip.register_post_execute is deprecated, use "
-             "ip.events.register('post_run_cell', func) instead.", stacklevel=2)
-        self.events.register('post_run_cell', func)
+        raise ValueError(
+            "ip.register_post_execute is deprecated since IPython 1.0, use "
+            "ip.events.register('post_run_cell', func) instead."
+        )
 
     def _clear_warning_registry(self):
         # clear the warning registry, so that different code blocks with

IPython/core/shellapp.py

@@ -98,11 +98,6 b' shell_aliases = dict('
 )
 shell_aliases['cache-size'] = 'InteractiveShell.cache_size'
 
-if traitlets.version_info < (5, 0):
-    # traitlets 4 doesn't handle lists on CLI
-    shell_aliases["ext"] = "InteractiveShellApp.extra_extension"
-
-
 #-----------------------------------------------------------------------------
 # Main classes and functions
 #-----------------------------------------------------------------------------
@@ -126,17 +121,6 b' class InteractiveShellApp(Configurable):'
         help="A list of dotted module names of IPython extensions to load."
     ).tag(config=True)
 
-    extra_extension = Unicode(
-        "",
-        help="""
-        DEPRECATED. Dotted module name of a single extra IPython extension to load.
-
-        Only one extension can be added this way.
-
-        Only used with traitlets < 5.0, plural extra_extensions list is used in traitlets 5.
-        """,
-    ).tag(config=True)
-
     extra_extensions = List(
         DottedObjectName(),
         help="""
@@ -293,8 +277,6 b' class InteractiveShellApp(Configurable):'
             extensions = (
                 self.default_extensions + self.extensions + self.extra_extensions
             )
-            if self.extra_extension:
-                extensions.append(self.extra_extension)
             for ext in extensions:
                 try:
                     self.log.info("Loading IPython extension: %s" % ext)

IPython/core/tests/test_formatters.py

@@ -430,18 +430,6 b' def test_ipython_display_formatter():'
     f.ipython_display_formatter.enabled = save_enabled
 
 
-def test_json_as_string_deprecated():
-    class JSONString(object):
-        def _repr_json_(self):
-            return '{}'
-    
-    f = JSONFormatter()
-    with warnings.catch_warnings(record=True) as w:
-        d = f(JSONString())
-    assert d == {}
-    assert len(w) == 1
-
-
 def test_repr_mime():
     class HasReprMime(object):
         def _repr_mimebundle_(self, include=None, exclude=None):

IPython/terminal/ipapp.py

@@ -262,22 +262,6 b' class TerminalIPythonApp(BaseIPythonApplication, InteractiveShellApp):'
     # internal, not-configurable
     something_to_run=Bool(False)
 
-    def parse_command_line(self, argv=None):
-        """override to allow old '-pylab' flag with deprecation warning"""
-
-        argv = sys.argv[1:] if argv is None else argv
-
-        if '-pylab' in argv:
-            # deprecated `-pylab` given,
-            # warn and transform into current syntax
-            argv = argv[:] # copy, don't clobber
-            idx = argv.index('-pylab')
-            warnings.warn("`-pylab` flag has been deprecated.\n"
-            "    Use `--matplotlib <backend>` and import pylab manually.")
-            argv[idx] = '--pylab'
-
-        return super(TerminalIPythonApp, self).parse_command_line(argv)
-    
     @catch_config_error
     def initialize(self, argv=None):
         """Do actions after construct, but before starting the app."""

IPython/utils/path.py

@@ -67,20 +67,6 b' def get_long_path_name(path):'
     return _get_long_path_name(path)
 
 
-def unquote_filename(name, win32=(sys.platform=='win32')):
-    """ On Windows, remove leading and trailing quotes from filenames.
-
-    This function has been deprecated and should not be used any more:
-    unquoting is now taken care of by :func:`IPython.utils.process.arg_split`.
-    """
-    warn("'unquote_filename' is deprecated since IPython 5.0 and should not "
-         "be used anymore", DeprecationWarning, stacklevel=2)
-    if win32:
-        if name.startswith(("'", '"')) and name.endswith(("'", '"')):
-            name = name[1:-1]
-    return name
-
-
 def compress_user(path):
     """Reverse of :func:`os.path.expanduser`
     """
@@ -89,7 +75,7 b' def compress_user(path):'
         path =  "~" + path[len(home):]
     return path
 
-def get_py_filename(name, force_win32=None):
+def get_py_filename(name):
     """Return a valid python filename in the current directory.
 
     If the given name is not a file, it adds '.py' and searches again.
@@ -97,10 +83,6 b' def get_py_filename(name, force_win32=None):'
     """
 
     name = os.path.expanduser(name)
-    if force_win32 is not None:
-        warn("The 'force_win32' argument to 'get_py_filename' is deprecated "
-             "since IPython 5.0 and should not be used anymore",
-            DeprecationWarning, stacklevel=2)
     if not os.path.isfile(name) and not name.endswith('.py'):
         name += '.py'
     if os.path.isfile(name):
@@ -253,36 +235,6 b' def get_xdg_cache_dir():'
     return None
 
 
-@undoc
-def get_ipython_dir():
-    warn("get_ipython_dir has moved to the IPython.paths module since IPython 4.0.", DeprecationWarning, stacklevel=2)
-    from IPython.paths import get_ipython_dir
-    return get_ipython_dir()
-
-@undoc
-def get_ipython_cache_dir():
-    warn("get_ipython_cache_dir has moved to the IPython.paths module since IPython 4.0.", DeprecationWarning, stacklevel=2)
-    from IPython.paths import get_ipython_cache_dir
-    return get_ipython_cache_dir()
-
-@undoc
-def get_ipython_package_dir():
-    warn("get_ipython_package_dir has moved to the IPython.paths module since IPython 4.0.", DeprecationWarning, stacklevel=2)
-    from IPython.paths import get_ipython_package_dir
-    return get_ipython_package_dir()
-
-@undoc
-def get_ipython_module_path(module_str):
-    warn("get_ipython_module_path has moved to the IPython.paths module since IPython 4.0.", DeprecationWarning, stacklevel=2)
-    from IPython.paths import get_ipython_module_path
-    return get_ipython_module_path(module_str)
-
-@undoc
-def locate_profile(profile='default'):
-    warn("locate_profile has moved to the IPython.paths module since IPython 4.0.", DeprecationWarning, stacklevel=2)
-    from IPython.paths import locate_profile
-    return locate_profile(profile=profile)
-
 def expand_path(s):
     """Expand $VARS and ~names in a string, like a shell
 

IPython/utils/timing.py

@@ -62,6 +62,7 b' if resource is not None and hasattr(resource, "getrusage"):'
         Similar to clock(), but return a tuple of user/system times."""
         return resource.getrusage(resource.RUSAGE_SELF)[:2]
 
+
 else:
     # There is no distinction of user/system time under windows, so we just use
     # time.perff_counter() for everything...

setup.py

@@ -171,7 +171,6 b' extras_require = dict('
     nbconvert=["nbconvert"],
 )
 
-
 everything = set(chain.from_iterable(extras_require.values()))
 extras_require['all'] = list(sorted(everything))