Modify conf.py for sphinx error due to update

docs/conf.py

@@ -96,10 +96,10 @@
 bibtex_bibfiles = ["tardis.bib"]
 
 intersphinx_mapping = {
-    "python": ("http://docs.python.org/", None),
-    "numpy": ("http://docs.scipy.org/doc/numpy/", None),
-    "scipy": ("http://docs.scipy.org/doc/scipy/reference/", None),
-    "matplotlib": ("http://matplotlib.sourceforge.net/", None),
+    "python": ("https://docs.python.org/3/", None),
+    "numpy": ("https://numpy.org/doc/stable/", None),
+    "scipy": ("https://docs.scipy.org/doc/scipy/", None),
+    "matplotlib": ("https://matplotlib.org/stable/", None),
     "astropy": ("http://docs.astropy.org/en/stable/", None),
     "h5py": ("http://docs.h5py.org/en/latest/", None),
     "pandas": ("http://pandas.pydata.org/pandas-docs/dev/", None),
@@ -135,7 +135,7 @@
 ]
 
 nbsphinx_prolog = r"""
-{% set docname = 'docs/' + env.doc2path(env.docname, base=None) %}
+{% set docname = 'docs/' + env.doc2path(env.docname, base=None)|string %}
 .. raw:: html
     
     <style>
@@ -183,6 +183,8 @@
 else:
     nbsphinx_execute = "auto"
 
+# nbsphinx_kernel_name = 'python3'
+# nbsphinx_allow_errors = True
 
 # -- Project information ------------------------------------------------------