[LNT] Python 3 support: Set up (client) setup requirements

Summary:
Changes required to allow setup of a LNT client with Python 3.

  - Use `PyModule_Create` instead of `Py_InitModule`
  - Drop `argparse` and `wsgiref` install requirements
  - Require Python 2.7 or higher in `setup.py`; Python 2.7 is needed for
    some Python 3 support idioms

Reviewers: cmatthews, thopre, kristof.beyls

Reviewed By: cmatthews

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D67533


git-svn-id: https://llvm.org/svn/llvm-project/lnt/trunk@371943 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 24 insertions, 3 deletions

diff --git a/lnt/testing/profile/cPerf.cpp b/lnt/testing/profile/cPerf.cpp
index df823f6..fb5f7b3 100644
--- a/lnt/testing/profile/cPerf.cpp
+++ b/lnt/testing/profile/cPerf.cpp
@@ -812,7 +812,25 @@ static PyMethodDef cPerfMethods[] = {{"importPerf", cPerf_importPerf,
                                       "Import perf.data from a filename"},
                                      {NULL, NULL, 0, NULL}};
 
-PyMODINIT_FUNC initcPerf(void) { (void)Py_InitModule("cPerf", cPerfMethods); }
+#if PY_MAJOR_VERSION >= 3
+static PyModuleDef cPerfModuleDef = {PyModuleDef_HEAD_INIT,
+                                     "cPerf",
+                                     nullptr,
+                                     -1,
+                                     cPerfMethods,
+                                     nullptr,
+                                     nullptr,
+                                     nullptr,
+                                     nullptr};
+#endif
+
+PyMODINIT_FUNC initcPerf(void) {
+#if PY_MAJOR_VERSION >= 3
+  return PyModule_Create(&cPerfModuleDef);
+#else
+  (void)Py_InitModule("cPerf", cPerfMethods);
+#endif
+}
 
 #else // STANDALONE
 
diff --git a/requirements.client.txt b/requirements.client.txt
index f1fe89f..2d919b0 100644
--- a/requirements.client.txt
+++ b/requirements.client.txt
@@ -7,12 +7,10 @@ Jinja2==2.7.2
 MarkupSafe==0.23
 SQLAlchemy==1.1.11
 Werkzeug==0.12.2
-argparse==1.3.0
 itsdangerous==0.24
 python-dateutil==2.6.0
 python-gnupg==0.3.7
 pytz==2016.10
-wsgiref==0.1.2
 WTForms==2.0.2
 Flask-WTF==0.12
 typing
diff --git a/setup.py b/setup.py
index 767aa64..f736c66 100644
--- a/setup.py
+++ b/setup.py
@@ -9,6 +9,9 @@ from sys import platform as _platform
 import sys
 from setuptools import setup, find_packages, Extension
 
+if sys.version_info < (2, 7):
+    raise RuntimeError("Python 2.7 or higher required.")
+
 cflags = []
 
 if _platform == "darwin":
@@ -124,4 +127,6 @@ http://llvm.org/svn/llvm-project/lnt/trunk
     install_requires=reqs,
 
     ext_modules=[cPerf],
+
+    python_requires='>=2.7',
 )