Add pyproject.toml

.gitignore

@@ -1,4 +1,4 @@
-*.pyc
+*.py[co]
 __pycache__
 py3k
 dist

README.rst

@@ -9,32 +9,40 @@ This package contains a python MySQL client library.
 
 It is a fork project from PyMySQL https://pymysql.readthedocs.io/en/latest/.
 
-CyMySQL accerarates by Cython, and support not only python 2 but also python 3.
-It still can work without Cython as a pure python driver.
+CyMySQL is accerarated by Cython and supports Python versions 2 and 3.
 
 Documentation on the MySQL client/server protocol can be found here:
 http://dev.mysql.com/doc/internals/en/client-server-protocol.html
 
 Requirements
 -------------
 
-- Python 2.7, 3.8+
-- MySQL 5.7 or higher
-    
+- Python 2.7, 3.5+
+- MySQL 5.7 or higher, MariaDB
+
 Installation
 --------------
 
-Install cython (optional)
-++++++++++++++++++++++++++++++
+Install Cython (optional)
++++++++++++++++++++++++++
 
-::
+Installation of Cython is optional.
+CyMySQL will run faster if installed, but will also run without it.
 
-   # pip install cython
+Since the bottleneck is often in MySQL queries, installing Cython may not be effective in many cases.
 
-Installation of cython is optional.
-CyMySQL will run faster if installed, but will also run without it.
+For most versions of pip and setuptools installation of Cython is not
+required as it's listed in pyproject.tompl as a required build-time
+dependency and will be installed automatically in the isolated build
+environemnt. This means it's not possible to install CyMySQL in
+pure-Python mode without cythonized extensions.
+
+For older versions of pip and setuptools that don't obey pyproject.tompl
+install Cython yourself:
 
-Since the bottleneck is often in MySQL queries, installing cython may not be effective in many cases.
+::
+
+   # pip install cython
 
 Install cymysql
 ++++++++++++++++++++++++++++++

cymysql/__init__.py

@@ -38,7 +38,8 @@
 if sys.version_info[0] > 2:
     from cymysql import aio
 
-VERSION = (1, 0, 2)
+from .__version__ import VERSION, __version__
+
 threadsafety = 1
 apilevel = "2.0"
 paramstyle = "format"
@@ -91,8 +92,6 @@ def connect(*args, **kwargs):
 
 NULL = "NULL"
 
-__version__ = '%s.%s.%s' % VERSION
-
 __all__ = [
     'BINARY', 'Binary', 'Connection', 'DATE', 'Date',
     'Time', 'Timestamp', 'DateFromTicks', 'TimeFromTicks', 'TimestampFromTicks',

cymysql/__version__.py

@@ -0,0 +1,2 @@
+VERSION = (1, 0, 2)
+__version__ = '%s.%s.%s' % VERSION

pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools", "Cython"]
+build-backend = "setuptools.build_meta"

setup.py

@@ -1,6 +1,20 @@
+from os.path import abspath, dirname, join
 import sys
+
 from setuptools import setup, Command, Extension
 
+versionpath = join(abspath(dirname(__file__)), 'cymysql', '__version__.py')
+cymysql_version = {}
+
+if sys.version_info[:2] == (2, 7):
+    execfile(versionpath, cymysql_version)  # noqa: F821 'execfile' Py3
+
+elif sys.version_info >= (3, 5):
+    exec(open(versionpath, 'r').read(), cymysql_version)
+
+else:
+    raise ImportError("CyMySQL requires Python 2.7 or 3.5+")
+
 try:
     from Cython.Build import cythonize
     ext_modules = cythonize([
@@ -40,7 +54,7 @@ def run(self):
 
 cmdclass = {'test': TestCommand}
 
-version_tuple = __import__('cymysql').VERSION
+version_tuple = cymysql_version['VERSION']
 
 if version_tuple[2] is not None:
     version = "%d.%d.%s" % version_tuple
@@ -55,6 +69,8 @@ def run(self):
     'Programming Language :: Python :: 2',
     'Programming Language :: Python :: 3',
     'Topic :: Database',
+    'Topic :: Database :: Front-Ends',
+    'Topic :: Software Development :: Libraries :: Python Modules',
 ]
 
 setup(