pyodbc_setup.py 文件源码

def add_to_path():
    """
    Prepends the build directory to the path so pyodbcconf can be imported without installing it.
    """
    # Now run the utility

    import imp
    library_exts  = [ t[0] for t in imp.get_suffixes() if t[-1] == imp.C_EXTENSION ]
    library_names = [ 'pyodbcconf%s' % ext for ext in library_exts ]

    # Only go into directories that match our version number. 

    dir_suffix = '-%s.%s' % (sys.version_info[0], sys.version_info[1])

    build = join(dirname(abspath(__file__)), 'build')

    for top, dirs, files in os.walk(build):
        dirs = [ d for d in dirs if d.endswith(dir_suffix) ]
        for name in library_names:
            if name in files:
                sys.path.insert(0, top)
                return

    raise SystemExit('Did not find pyodbcconf')