session.py 文件源码

def _make_message(ipython=True, quiet=False, source=None):
    """Create a banner for an interactive session. """
    from sympy import __version__ as sympy_version
    from sympy.polys.domains import GROUND_TYPES
    from sympy.utilities.misc import ARCH
    from sympy import SYMPY_DEBUG

    import sys
    import os

    python_version = "%d.%d.%d" % sys.version_info[:3]

    if ipython:
        shell_name = "IPython"
    else:
        shell_name = "Python"

    info = ['ground types: %s' % GROUND_TYPES]

    cache = os.getenv('SYMPY_USE_CACHE')

    if cache is not None and cache.lower() == 'no':
        info.append('cache: off')

    if SYMPY_DEBUG:
        info.append('debugging: on')

    args = shell_name, sympy_version, python_version, ARCH, ', '.join(info)
    message = "%s console for SymPy %s (Python %s-%s) (%s)\n" % args

    if not quiet:
        if source is None:
            source = preexec_source

        _source = ""

        for line in source.split('\n')[:-1]:
            if not line:
                _source += '\n'
            else:
                _source += '>>> ' + line + '\n'

        message += '\n' + verbose_message % {'source': _source}

    return message