diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/doc/CMakeLists.txt.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/doc/CMakeLists.txt
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/doc/CMakeLists.txt.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/doc/CMakeLists.txt	2020-02-13 15:45:51.942114727 -0700
@@ -48,7 +48,7 @@ endif ()
 add_prefix(doc_deps ../ ${MP_HEADERS})
 
 add_custom_target(doc
-  COMMAND python ${BUILD_DOCS}
+  COMMAND python3 ${BUILD_DOCS}
   DEPENDS conf.py ${doc_deps} ${amplgsl_docs})
 
 install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/ampl.github.io/
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap-linux.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap-linux.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap-linux.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap-linux.py	2020-02-13 15:22:47.654450099 -0700
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 """
 Set up build environment on Ubuntu or other Debian-based
 Linux distribution.
@@ -10,7 +10,7 @@ buildbot: install buildbot slave
 """
 
 import platform, re, os, shutil
-from bootstrap import *
+from .bootstrap import *
 from subprocess import check_call, Popen, PIPE
 
 if __name__ == '__main__':
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap-osx.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap-osx.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap-osx.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap-osx.py	2020-02-13 15:22:24.535839893 -0700
@@ -1,8 +1,7 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # Set up build environment on OS X Moutain Lion.
 
-from __future__ import print_function
-from bootstrap import *
+from .bootstrap import *
 import glob, os, sys, tempfile
 from subprocess import call, check_call
 
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap.py	2020-02-13 15:21:39.224603644 -0700
@@ -1,6 +1,5 @@
 # Common bootstrap functionality.
 
-from __future__ import print_function
 import glob, os, platform, re, shutil, sys
 import tarfile, tempfile, uuid, zipfile
 from contextlib import closing
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap-windows.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap-windows.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap-windows.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/bootstrap-windows.py	2020-02-13 15:23:25.110818565 -0700
@@ -1,8 +1,7 @@
 # Set up build environment on 64-bit Windows.
 
-from __future__ import print_function
 import os, shutil, tempfile
-from bootstrap import *
+from .bootstrap import *
 from glob import glob
 from subprocess import check_call, check_output
 
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/create-ubuntu-image.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/create-ubuntu-image.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/create-ubuntu-image.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/bootstrap/create-ubuntu-image.py	2020-02-13 15:11:03.171308668 -0700
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 """
 Create a base docker image for Ubuntu Lucid.
 
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/build-docs.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/build-docs.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/build-docs.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/build-docs.py	2020-02-14 10:11:07.288162263 -0700
@@ -1,12 +1,11 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 """Build documentation.
 
 Usage: build-docs.py [extract-docs <file>]
 """
 
-from __future__ import print_function
 import fileutil, mmap, os, re, shutil
-from subprocess import call, check_call, check_output, Popen, PIPE
+from subprocess import check_call, Popen, PIPE
 from docopt import docopt
 
 mp_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
@@ -14,21 +13,6 @@ mp_dir = os.path.dirname(os.path.dirname
 def run(*args, **kwargs):
   check_call(args, **kwargs)
 
-def create_virtualenv(venv_dir):
-  "Create and activate virtualenv in the given directory."
-  # File "check" is used to make sure that we don't have
-  # a partial environment in case virtualenv was interrupted.
-  check_path = os.path.join(venv_dir, 'check')
-  if not os.path.exists(check_path):
-    run('virtualenv', venv_dir)
-    os.mknod(check_path)
-  # Activate virtualenv.
-  import sysconfig
-  scripts_dir = os.path.basename(sysconfig.get_path('scripts'))
-  activate_this_file = os.path.join(venv_dir, scripts_dir, 'activate_this.py')
-  with open(activate_this_file) as f:
-    exec(f.read(), dict(__file__=activate_this_file))
-
 def extract_docs(filename, output_dir):
   "Extract the AMPLGSL documentation from the code."
   output = None
@@ -36,9 +20,9 @@ def extract_docs(filename, output_dir):
   if not os.path.exists(output_dir):
     os.mkdir(output_dir)
   with open(filename, 'r+b') as input:
-    map = mmap.mmap(input.fileno(), 0)
-    for i in re.finditer(r'/\*\*(.*?)\*/', map, re.DOTALL):
-      s = re.sub(r'\n +\* ?', r'\n', i.group(1))
+    mm = mmap.mmap(input.fileno(), 0)
+    for i in re.finditer(rb'/\*\*(.*?)\*/', mm, re.DOTALL):
+      s = re.sub(r'\n +\* ?', r'\n', i.group(1).decode('utf-8'))
       s = re.sub(r'\$(.+?)\$', r':math:`\1`', s, flags=re.DOTALL)
       m = re.search(r'@file (.*)', s)
       if m:
@@ -48,7 +32,7 @@ def extract_docs(filename, output_dir):
         output = open(os.path.join(output_dir, filename + '.rst'), 'w')
         s = s[:m.start()] + s[m.end():]
       output.write(s.rstrip(' '))
-    map.close()
+    mm.close()
 
 def get_mp_version():
   filename = os.path.join(os.path.dirname(__file__), '..', 'CMakeLists.txt')
@@ -58,13 +42,6 @@ def get_mp_version():
       if m:
         return m.group(1)
 
-def pip_install(package, **kwargs):
-  "Install package using pip."
-  commit = kwargs.get('commit')
-  if commit:
-    package = 'git+git://github.com/{0}.git@{1}'.format(package, commit)
-  run('pip', 'install', '-q', package)
-
 def copy_content(src_dir, dst_dir):
   "Copy content of the src_dir to dst_dir recursively."
   for entry in os.listdir(src_dir):
@@ -77,16 +54,11 @@ def copy_content(src_dir, dst_dir):
       shutil.copyfile(src, dst)
 
 def build_docs(workdir, doxygen='doxygen'):
-  create_virtualenv(os.path.join(workdir, 'build', 'virtualenv'))
-  # Install Sphinx and Breathe.
-  pip_install('sphinx==1.3.1')
-  pip_install('breathe', check_version='4.1.0')
-
   # Clone the ampl.github.io repo.
   repo = 'ampl.github.io'
   repo_dir = os.path.join(workdir, repo)
   if not os.path.exists(repo_dir):
-    run('git', 'clone', 'https://github.com/ampl/{}.git'.format(repo), cwd=workdir)
+    shutil.copytree(os.path.join(mp_dir, repo), repo_dir)
 
   # Copy API docs and the database connection guides to the build directory.
   # The guides are not stored in the mp repo to avoid polluting history with
@@ -129,7 +101,7 @@ def build_docs(workdir, doxygen='doxygen
       JAVADOC_AUTOBRIEF = YES
       ALIASES           = "rst=\verbatim embed:rst"
       ALIASES          += "endrst=\endverbatim"
-    '''.format(mp_dir))
+    '''.format(mp_dir).encode('utf-8'))
   returncode = p.returncode
   if returncode == 0:
     # Pass the MP version via environment variables rather than command-line
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/create-demo-packages.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/create-demo-packages.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/create-demo-packages.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/create-demo-packages.py	2020-02-13 15:25:54.934292448 -0700
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 """Create AMPL demo packages.
 
 Usage:
@@ -8,14 +8,13 @@ Options:
   --cache  Cache downloaded packages (for debugging).
 """
 
-from __future__ import print_function
 import fileutil, gzip, os, shutil, stat, subprocess
-import tarfile, tempfile, ctxtimer, urllib, zipfile
+import tarfile, tempfile, ctxtimer, urllib.request, urllib.parse, zipfile
 from docopt import docopt
 from glob import glob
 from sets import Set
-from StringIO import StringIO
-from urlparse import urlparse
+from io import StringIO
+from urllib.parse import urlparse
 
 # URL for downloading student versions of AMPL binaries.
 student_url = 'http://www.ampl.com/netlib/ampl/student/'
@@ -63,7 +62,7 @@ def retrieve_cached(url, system = None):
     print('Using cached version of', filename)
   else:
     print('Downloading', filename)
-    urllib.urlretrieve(url, cached_path)
+    urllib.request.urlretrieve(url, cached_path)
   return cached_path
 
 # Extract files from amplcml.zip.
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/create-packages.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/create-packages.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/create-packages.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/create-packages.py	2020-02-13 15:24:36.877608531 -0700
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 """Create packages of AMPL solvers and libraries.
 
@@ -6,7 +6,6 @@ Usage:
   create-packages.py [update]
 """
 
-from __future__ import print_function
 import docopt, fileutil, os, re, shutil, subprocess, tempfile, zipfile
 
 project = "ampl"
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/create-solver-package.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/create-solver-package.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/create-solver-package.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/create-solver-package.py	2020-02-13 15:26:12.420997611 -0700
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 """Create a solver source package for AMPL use.
 
@@ -6,7 +6,6 @@ Usage:
   create-solver-packages.py <solver>
 """
 
-from __future__ import print_function
 import docopt, os, zipfile
 
 mp_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/ctxtimer.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/ctxtimer.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/ctxtimer.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/ctxtimer.py	2020-02-13 15:21:20.295922221 -0700
@@ -1,6 +1,5 @@
 # A with statement context based timer.
 
-from __future__ import print_function
 from contextlib import contextmanager
 import sys, timeit
 
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/docopt.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/docopt.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/docopt.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/docopt.py	2020-02-13 15:20:13.337049167 -0700
@@ -81,7 +81,7 @@ def transform(pattern):
     while groups:
         children = groups.pop(0)
         parents = [Required, Optional, OptionsShortcut, Either, OneOrMore]
-        if any(t in map(type, children) for t in parents):
+        if any(t in list(map(type, children)) for t in parents):
             child = [c for c in children if type(c) in parents][0]
             children.remove(child)
             if type(child) is Either:
@@ -181,12 +181,12 @@ class Option(LeafPattern):
 
     def __init__(self, short=None, long=None, argcount=0, value=False):
         assert argcount in (0, 1)
-        self.short, self.long, self.argcount = short, long, argcount
+        self.short, self.long, self.argcount = short, int, argcount
         self.value = None if value is False and argcount else value
 
     @classmethod
     def parse(class_, option_description):
-        short, long, argcount, value = None, None, 0, False
+        short, int, argcount, value = None, None, 0, False
         options, _, description = option_description.strip().partition('  ')
         options = options.replace(',', ' ').replace('=', ' ')
         for s in options.split():
@@ -199,7 +199,7 @@ class Option(LeafPattern):
         if argcount:
             matched = re.findall('\[default: (.*)\]', description, flags=re.I)
             value = matched[0] if matched else None
-        return class_(short, long, argcount, value)
+        return class_(short, int, argcount, value)
 
     def single_match(self, left):
         for n, pattern in enumerate(left):
@@ -300,21 +300,21 @@ class Tokens(list):
 
 def parse_long(tokens, options):
     """long ::= '--' chars [ ( ' ' | '=' ) chars ] ;"""
-    long, eq, value = tokens.move().partition('=')
-    assert long.startswith('--')
+    int, eq, value = tokens.move().partition('=')
+    assert int.startswith('--')
     value = None if eq == value == '' else value
-    similar = [o for o in options if o.long == long]
+    similar = [o for o in options if o.long == int]
     if tokens.error is DocoptExit and similar == []:  # if no exact match
-        similar = [o for o in options if o.long and o.long.startswith(long)]
+        similar = [o for o in options if o.long and o.long.startswith(int)]
     if len(similar) > 1:  # might be simply specified ambiguously 2+ times?
         raise tokens.error('%s is not a unique prefix: %s?' %
-                           (long, ', '.join(o.long for o in similar)))
+                           (int, ', '.join(o.long for o in similar)))
     elif len(similar) < 1:
         argcount = 1 if eq == '=' else 0
-        o = Option(None, long, argcount)
+        o = Option(None, int, argcount)
         options.append(o)
         if tokens.error is DocoptExit:
-            o = Option(None, long, argcount, value if argcount else True)
+            o = Option(None, int, argcount, value if argcount else True)
     else:
         o = Option(similar[0].short, similar[0].long,
                    similar[0].argcount, similar[0].value)
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/download.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/download.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/download.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/download.py	2020-02-13 15:27:21.146838851 -0700
@@ -1,6 +1,6 @@
 # A file downloader.
 
-import contextlib, os, tempfile, ctxtimer, urllib2, urlparse
+import contextlib, os, tempfile, ctxtimer, urllib.request, urllib.error, urllib.parse
 
 class Downloader:
   def __init__(self, dir=None):
@@ -12,18 +12,18 @@ class Downloader:
   #  with d.download(url) as f:
   #    use_file(f)
   def download(self, url, cookie=None):
-    suffix = os.path.splitext(urlparse.urlsplit(url)[2])[1]
+    suffix = os.path.splitext(urllib.parse.urlsplit(url)[2])[1]
     fd, filename = tempfile.mkstemp(suffix=suffix, dir=self.dir)
     os.close(fd)
     with ctxtimer.print_time('Downloading', url, 'to', filename):
-      opener = urllib2.build_opener()
+      opener = urllib.request.build_opener()
       if cookie:
         opener.addheaders.append(('Cookie', cookie))
       num_tries = 2
       for i in range(num_tries):
         try:
           f = opener.open(url)
-        except urllib2.URLError, e:
+        except urllib.error.URLError as e:
           print('Failed to open url', url)
           continue
         length = f.headers.get('content-length')
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/fileutil.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/fileutil.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/fileutil.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/fileutil.py	2020-02-13 15:23:52.255360892 -0700
@@ -1,6 +1,5 @@
 # File utils.
 
-from __future__ import print_function
 import errno, os, shutil, zipfile
 
 # Delete an entire directory tree if it exists.
@@ -31,7 +30,7 @@ def make_archive(archive_name, dirname):
         if os.path.islink(path):
           zipinfo = zipfile.ZipInfo(path)
           zipinfo.create_system = UNIX
-          zipinfo.external_attr = 2716663808L
+          zipinfo.external_attr = 2716663808
           zip.writestr(zipinfo, os.readlink(path))
         else:
           zip.write(path, path)
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/get-options.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/get-options.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/get-options.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/get-options.py	2020-02-13 15:11:03.187308399 -0700
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # This scripts extract options from solvers and formats them in HTML.
 
 import errno, os, sys
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/travis-build.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/travis-build.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/travis-build.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/travis-build.py	2020-02-13 15:21:02.537221108 -0700
@@ -1,7 +1,6 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # Build the project on Travis CI.
 
-from __future__ import print_function
 import os, re, shutil, tarfile, tempfile
 from bootstrap import bootstrap
 from contextlib import closing
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/update-dependencies.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/update-dependencies.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/update-dependencies.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/update-dependencies.py	2020-02-13 15:11:03.177308567 -0700
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # Updates dependencies integrated into the source tree such as C++ Format.
 
 import download, os, re, shutil, zipfile, fileutil
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/update-netlib-branch.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/update-netlib-branch.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/update-netlib-branch.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/support/update-netlib-branch.py	2020-02-13 15:11:03.176308584 -0700
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # This script updates the "netlib" branch from the AMPL Solver Library
 # repository at rsync ampl.com::ampl/
 
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/test/generate-nl-files.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/test/generate-nl-files.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/test/generate-nl-files.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/test/generate-nl-files.py	2020-02-13 15:17:56.691348963 -0700
@@ -1,11 +1,11 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 # This scripts generates test .nl files from AMPL model and data files.
 
 from subprocess import Popen, PIPE
 
 def generate_nl_file(stub, *files, **kwargs):
   code = ''
-  for key, value in kwargs.iteritems():
+  for key, value in kwargs.items():
     if key == 'code':
       code = value
     else:
diff -up mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/test/support/util.py.orig mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/test/support/util.py
--- mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/test/support/util.py.orig	2019-12-09 11:21:17.000000000 -0700
+++ mp-51aeb2c386342ed4f48cc78d3df9e4e57a70f667/test/support/util.py	2020-02-13 15:18:38.826639813 -0700
@@ -1,5 +1,5 @@
 import sys
-from cStringIO import StringIO
+from io import StringIO
 
 # Captures output to stdout in a block.
 # Usage: