def _proc_python_exe(python_requires):
if not python_requires:
return sys.executable
matching = util.find_python_interpreter(python_requires)
if not matching:
_op_cmd_error("cannot find a python interpreter for "
"requirement %r" % python_requires)
path, _ver = matching
return path
def _python_exe(opdef):
req = opdef.python_requires or opdef.modeldef.python_requires
if req:
matching = util.find_python_interpreter(req)
if not matching:
raise OpInitError("cannot find a python interpreter for "
"version requirement %r" % req)
path, _ver = matching
return path
return sys.executable
def _suggest_python_interpreter(user_reqs):
"""Returns best guess Python interpreter.
We look for a Python requirement in two places: a package def in
cwd Guild file and user requirements, which includes
requirements.txt by default.
A Python spec can be provided in a requirements file using a
special `python<spec>` comment. E.g. `python>=3.5`.
"""
python_requires = util.find_apply(
[_python_requires_for_pkg, lambda: _python_requires_for_reqs(user_reqs),]
)
if not python_requires:
return None
matching = util.find_python_interpreter(python_requires)
if matching:
_path, ver = matching
return "python%s" % ver
return None