def checkline(self, filename, lineno):
        # this method should be callable before starting debugging, so default
        # to "no globals" if there is no current frame
        globs = self.curframe.f_globals if hasattr(self, 'curframe') else None
        line = linecache.getline(filename, lineno, globs)
        if not line:
            print >>self.stdout, 'End of file'
            return 0
        line = line.strip()
        # Don't allow setting breakpoint at a blank line
        if (not line or (line[0] == '#') or
             (line[:3] == '"""') or line[:3] == "'''"):
            print >>self.stdout, '*** Blank or comment'
            return 0
        return lineno
Check whether specified line seems to be executable.
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/pdb.py/Pdb.checkline