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#!/usr/bin/env python
"""
Script to run Cython with a Python command line.
Executes Python code by compiling it in Cython and running the compiled code.
"""
import sys
import subprocess
def parse_args(args=None):
import optparse # tried argparse, but it doesn't stop at the first (interspersed) positional argument
parser = optparse.OptionParser(description='Run a Python command line with Cython')
parser.disable_interspersed_args()
parser.add_option('-c', metavar='CODE', dest='command',
help='program passed in as string')
parser.add_option('--python', metavar='PYTHON', dest='python', default=sys.executable,
help='Python interpreter to use')
parser.add_option('-X', metavar='NAME=VALUE', dest='directives', action='append',
help='Compiler directives to set during compilation')
parser.add_option('-V', '--version', action='store_true',
help='print the Python and Cython version numbers and exit')
return parser.parse_args(args)
def run_python(python, command):
subprocess.check_call([python, '-c', command])
def print_versions(python):
"""Print version numbers of Python and Cython.
"""
command = (
"import sys, Cython; "
"print('Python {}'.format('.'.join(map(str, sys.version_info[:3])))); "
"print('[Cython {}]'.format(Cython.__version__))"
)
run_python(python, command)
def run_cython_command(python, command, args=None):
"""Compile and run a Python command string.
"""
command = (
"import sys; "
"from Cython.Build.Inline import cython_inline; "
"sys.argv[1:] = {args!r}; "
"(lambda: cython_inline({code!r}, quiet=True))()"
).format(code=command, args=list(args) if args else [])
run_python(python, command)
def run_python_stdin(python, file_args=None, directives=None):
"""Compile and run a Python program from stdin.
"""
import shutil
import tempfile
with tempfile.NamedTemporaryFile(suffix='.py') as f:
shutil.copyfileobj(sys.stdin, f)
f.flush()
file_args = [f.name] + list(file_args or ())
run_python_file(python, file_args, directives)
def run_python_file(python, file_args, directives=None):
"""Compile and run a Python program from a file.
"""
args = []
if directives:
for directive in directives:
args.extend(('-X', directive))
args.extend(file_args)
command = (
"import Cython.Build.BuildExecutable as bex; "
"bex.DEBUG = False; "
"bex.build_and_run({args!r})"
).format(args=args)
run_python(python, command)
def main():
options, args = parse_args()
python = options.python
if options.version:
print_versions(python)
return
if options.command:
run_cython_command(python, options.command, args)
if args:
if args[0] == '-':
run_python_stdin(python, args[1:], options.directives)
else:
run_python_file(python, args, options.directives)
if __name__ == '__main__':
main()
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