gh-35911: Pep8 in repl
    
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### 📚 Description

just some pep8 fixes in `repl` folder

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URL: #35911
Reported by: Frédéric Chapoton
Reviewer(s): David Coudert

Author: Release Manager

src/sage/repl/display/formatter.py

@@ -79,6 +79,7 @@
 
 lazy_import('matplotlib.figure', 'Figure')
 
+
 class SageDisplayFormatter(DisplayFormatter):
 
     def __init__(self, *args, **kwds):
@@ -194,7 +195,7 @@ def format(self, obj, include=None, exclude=None):
         # if it is not plain and dull
         if (not isinstance(obj, IPYTHON_NATIVE_TYPES) and
             not set(sage_format.keys()).issubset([PLAIN_TEXT]) and
-            not isinstance(obj, Figure)):
+                not isinstance(obj, Figure)):
             return sage_format, sage_metadata
 
         if self.ipython_display_formatter(obj):

src/sage/repl/display/util.py

@@ -6,14 +6,14 @@
 methods elsewhere.
 """
 
-#*****************************************************************************
+# ****************************************************************************
 #       Copyright (C) 2014 Volker Braun <[email protected]>
 #
 #  Distributed under the terms of the GNU General Public License (GPL)
 #  as published by the Free Software Foundation; either version 2 of
 #  the License, or (at your option) any later version.
-#                  http://www.gnu.org/licenses/
-#*****************************************************************************
+#                  https://www.gnu.org/licenses/
+# ****************************************************************************
 
 
 class TallListFormatter():
@@ -39,7 +39,7 @@ def _tall_list_row(self, running_lines, last_row=False):
             sage: format_list._tall_list_row(['a   b', 'b  c', 'c'])
             ['a           b', 'b        c', 'c,', '']
         """
-        s=[]
+        s = []
         for i, line in enumerate(running_lines):
             if i + 1 != len(running_lines):
                 sep, tail = '  ', ''

src/sage/repl/ipython_kernel/install.py

@@ -263,14 +263,14 @@ def check(cls):
             spec = get_kernel_spec(ident)
         except NoSuchKernel:
             warnings.warn(f'no kernel named {ident} is accessible; '
-                           'check your Jupyter configuration '
-                           '(see https://docs.jupyter.org/en/latest/use/jupyter-directories.html)')
+                          'check your Jupyter configuration '
+                          '(see https://docs.jupyter.org/en/latest/use/jupyter-directories.html)')
         else:
             from pathlib import Path
             if Path(spec.argv[0]).resolve() != Path(os.path.join(SAGE_VENV, 'bin', 'sage')).resolve():
                 warnings.warn(f'the kernel named {ident} does not seem to correspond to this '
-                               'installation of SageMath; check your Jupyter configuration '
-                               '(see https://docs.jupyter.org/en/latest/use/jupyter-directories.html)')
+                              'installation of SageMath; check your Jupyter configuration '
+                              '(see https://docs.jupyter.org/en/latest/use/jupyter-directories.html)')
 
 
 def have_prerequisites(debug=True):

src/sage/repl/ipython_kernel/interact.py

@@ -55,8 +55,8 @@ def f(x=(0, 10)):
 from sage.structure.element import parent
 import sage.rings.abc
 from sage.misc.lazy_import import lazy_import
-lazy_import("sage.plot.colors", "Color")
 from sage.structure.element import Matrix
+lazy_import("sage.plot.colors", "Color")
 
 
 class sage_interactive(interactive):

src/sage/repl/ipython_kernel/kernel.py

@@ -6,14 +6,14 @@
 notebook or remote Jupyter sessions.
 """
 
-#*****************************************************************************
+# ***************************************************************************
 #       Copyright (C) 2015 Volker Braun <[email protected]>
 #
 #  Distributed under the terms of the GNU General Public License (GPL)
 #  as published by the Free Software Foundation; either version 2 of
 #  the License, or (at your option) any later version.
-#                  http://www.gnu.org/licenses/
-#*****************************************************************************
+#                  https://www.gnu.org/licenses/
+# ***************************************************************************
 
 import sys
 from ipykernel.ipkernel import IPythonKernel
@@ -24,6 +24,7 @@
 from sage.repl.interpreter import SageNotebookInteractiveShell
 from sage.repl.ipython_extension import SageJupyterCustomizations
 
+
 class SageZMQInteractiveShell(SageNotebookInteractiveShell, ZMQInteractiveShell):
     pass
 
@@ -98,7 +99,10 @@ def help_links(self):
         """
         from sage.repl.ipython_kernel.install import SageKernelSpec
         identifier = SageKernelSpec.identifier()
-        kernel_url = lambda x: 'kernelspecs/{0}/{1}'.format(identifier, x)
+
+        def kernel_url(x):
+            return 'kernelspecs/{0}/{1}'.format(identifier, x)
+
         return [
             {
                 'text': 'Sage Documentation',

src/sage/repl/ipython_kernel/widgets_sagenb.py

@@ -29,12 +29,12 @@
 # ****************************************************************************
 
 from ipywidgets.widgets import (IntSlider, IntRangeSlider, FloatSlider,
-        FloatRangeSlider, SelectionSlider,
-        Checkbox, ToggleButtons, Dropdown)
+                                FloatRangeSlider, SelectionSlider,
+                                Checkbox, ToggleButtons, Dropdown)
 from .widgets import (TransformText, TransformTextarea,
-        TransformIntSlider, TransformIntRangeSlider,
-        TransformFloatSlider, TransformFloatRangeSlider,
-        EvalText, EvalTextarea, SageColorPicker, Grid)
+                      TransformIntSlider, TransformIntRangeSlider,
+                      TransformFloatSlider, TransformFloatRangeSlider,
+                      EvalText, EvalTextarea, SageColorPicker, Grid)
 from ipywidgets.widgets.interaction import _get_min_max_value
 from collections.abc import Iterable, Sequence
 from numbers import Integral, Rational, Real
@@ -43,10 +43,10 @@
 from sage.arith.srange import srange
 import sage.rings.abc
 
-Color = None
-
 from .widgets import HTMLText as text_control
 
+Color = None
+
 
 def input_box(default=None, label=None, type=None, width=80, height=1):
     """
@@ -153,7 +153,7 @@ def input_box(default=None, label=None, type=None, width=80, height=1):
     if label is not None:
         kwds["description"] = label
     w = cls(**kwds)
-    w.layout.max_width = str(width+1) + "em"
+    w.layout.max_width = str(width + 1) + "em"
     return w
 
 

src/sage/repl/rich_output/backend_base.py

@@ -39,14 +39,14 @@
     [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
 """
 
-#*****************************************************************************
+# ****************************************************************************
 #       Copyright (C) 2015 Volker Braun <[email protected]>
 #
 #  Distributed under the terms of the GNU General Public License (GPL)
 #  as published by the Free Software Foundation; either version 2 of
 #  the License, or (at your option) any later version.
-#                  http://www.gnu.org/licenses/
-#*****************************************************************************
+#                  https://www.gnu.org/licenses/
+# ****************************************************************************
 
 import builtins
 from io import StringIO

src/sage/repl/rich_output/backend_emacs.py

@@ -7,14 +7,14 @@
 
 """
 
-#*****************************************************************************
+# ****************************************************************************
 #       Copyright (C) 2015 Ivan Andrus <[email protected]>
 #
 #  Distributed under the terms of the GNU General Public License (GPL)
 #  as published by the Free Software Foundation; either version 2 of
 #  the License, or (at your option) any later version.
 #                  https://www.gnu.org/licenses/
-#*****************************************************************************
+# ****************************************************************************
 
 from sage.repl.rich_output.backend_ipython import BackendIPythonCommandline
 from sage.repl.rich_output.output_catalog import *

src/sage/repl/rich_output/backend_ipython.py

@@ -6,14 +6,14 @@
 :mod:`sage.repl.rich_output`.
 """
 
-#*****************************************************************************
+# ****************************************************************************
 #       Copyright (C) 2015 Volker Braun <[email protected]>
 #
 #  Distributed under the terms of the GNU General Public License (GPL)
 #  as published by the Free Software Foundation; either version 2 of
 #  the License, or (at your option) any later version.
-#                  http://www.gnu.org/licenses/
-#*****************************************************************************
+#                  https://www.gnu.org/licenses/
+# ****************************************************************************
 
 import os
 import sys
@@ -428,8 +428,7 @@ def normpath(p):
         return '\n<script src="{0}"></script>'.format(script)
 
 
-IFRAME_TEMPLATE = \
-"""
+IFRAME_TEMPLATE = """
 <iframe srcdoc="{escaped_html}"
         width="{width}"
         height="{height}"
@@ -543,35 +542,35 @@ def displayhook(self, plain_text, rich_output):
                      'text/plain': plain_text.text.get_str(),
             }, {})
         elif isinstance(rich_output, OutputHtml):
-            data = {'text/html':  rich_output.html.get_str(),
+            data = {'text/html': rich_output.html.get_str(),
                     'text/plain': plain_text.text.get_str()}
             if rich_output.latex:
                 data['text/latex'] = rich_output.latex.get_str()
             return (data, {})
         elif isinstance(rich_output, OutputImagePng):
-            return ({'image/png':  rich_output.png.get(),
+            return ({'image/png': rich_output.png.get(),
                      'text/plain': plain_text.text.get_str(),
             }, {})
         elif isinstance(rich_output, OutputImageGif):
-            return ({'text/html':  rich_output.html_fragment(),
+            return ({'text/html': rich_output.html_fragment(),
                      'text/plain': plain_text.text.get_str(),
             }, {})
         elif isinstance(rich_output, OutputImageJpg):
-            return ({'image/jpeg':  rich_output.jpg.get(),
-                     'text/plain':  plain_text.text.get_str(),
+            return ({'image/jpeg': rich_output.jpg.get(),
+                     'text/plain': plain_text.text.get_str(),
             }, {})
         elif isinstance(rich_output, OutputImageSvg):
             return ({'image/svg+xml': rich_output.svg.get(),
-                     'text/plain':    plain_text.text.get_str(),
+                     'text/plain': plain_text.text.get_str(),
             }, {})
         elif isinstance(rich_output, OutputImagePdf):
-            return ({'image/png':  rich_output.png.get(),
+            return ({'image/png': rich_output.png.get(),
                      'text/plain': plain_text.text.get_str(),
             }, {})
         elif isinstance(rich_output, OutputSceneJmol):
             from sage.repl.display.jsmol_iframe import JSMolHtml
             jsmol = JSMolHtml(rich_output, height=500)
-            return ({'text/html':  jsmol.iframe(),
+            return ({'text/html': jsmol.iframe(),
                      'text/plain': plain_text.text.get_str(),
             }, {})
         elif isinstance(rich_output, OutputSceneThreejs):
@@ -581,7 +580,7 @@ def displayhook(self, plain_text, rich_output):
                 width='100%',
                 height=400,
             )
-            return ({'text/html':  iframe,
+            return ({'text/html': iframe,
                      'text/plain': plain_text.text.get_str(),
             }, {})
         else:

src/sage/repl/rich_output/display_manager.py

@@ -30,7 +30,7 @@
 #  Distributed under the terms of the GNU General Public License (GPL)
 #  as published by the Free Software Foundation; either version 2 of
 #  the License, or (at your option) any later version.
-#                  http://www.gnu.org/licenses/
+#                  https://www.gnu.org/licenses/
 # ****************************************************************************
 
 
@@ -45,6 +45,7 @@
 )
 from sage.repl.rich_output.preferences import DisplayPreferences
 
+
 def _required_threejs_version():
     """
     Return the version of threejs that Sage requires.
@@ -60,6 +61,7 @@ def _required_threejs_version():
     with open(os.path.join(sage.env.SAGE_EXTCODE, 'threejs', 'threejs-version.txt')) as f:
         return f.read().strip()
 
+
 class DisplayException(Exception):
     """
     Base exception for all rich output-related exceptions.