Method __init__

wdev.py:308–392

Args: cpu: A WindowsCpu instance. If None, we use whatever we are running on. version: Two-digit Python version as a string such as `3.8`. If None we use current Python's version. verbose:

( self, cpu=None, version=None, verbose=True)

    '''

    def __init__( self, cpu=None, version=None, verbose=True):
        '''
        Args:

            cpu:
                A WindowsCpu instance. If None, we use whatever we are running
                on.
            version:
                Two-digit Python version as a string such as `3.8`. If None we
                use current Python's version.
            verbose:
                If true we show diagnostics.
        '''
        if cpu is None:
            cpu = WindowsCpu(_cpu_name())
        if version is None:
            version = '.'.join(platform.python_version().split('.')[:2])
        _log(f'Looking for Python {version=} {cpu.bits=}.')

        if '.'.join(platform.python_version().split('.')[:2]) == version:
            # Current python matches, so use it directly. This avoids problems
            # on Github where experimental python-3.13 was not available via
            # `py`, and is kept here in case a similar problems happens with
            # future Python versions.
            _log(f'{cpu=} {version=}: using {sys.executable=}.')
            self.path = sys.executable
            self.version = version
            self.cpu = cpu
            self.include = sysconfig.get_path('include')

        else:
            command = 'py -0p'
            if verbose:
                _log(f'{cpu=} {version=}: Running: {command}')
            text = subprocess.check_output( command, shell=True, text=True)
            for line in text.split('\n'):
                #_log( f'    {line}')
                if m := re.match( '^ *-V:([0-9.]+)(-32)? ([*])? +(.+)$', line):
                    version2 = m.group(1)
                    bits = 32 if m.group(2) else 64
                    current = m.group(3)
                    path = m.group(4).strip()
                elif m := re.match( '^ *-([0-9.]+)-((32)|(64)) +(.+)$', line):
                    version2 = m.group(1)
                    bits = int(m.group(2))
                    path = m.group(5).strip()
                else:
                    if verbose:
                        _log( f'No match for {line=}')
                    continue
                if verbose:
                    _log( f'{version2=} {bits=} {path=} from {line=}.')
                if bits != cpu.bits or version2 != version:
                    continue
                root = os.path.dirname(path)
                if not os.path.exists(path):
                    # Sometimes it seems that the specified .../python.exe does not exist,
                    # and we have to change it to .../python<version>.exe.