visualstudio_py_debugger.py 文件源码

def line_locations(self):
        if self._line_locations is None:
            # we need to calculate our line number offset information
            try:
                contents = open(self.filename, 'rb')
            except:
                # file not available, locked, etc...
                pass
            else:
                with contents:
                    line_info = []
                    file_len = 0
                    for line in contents:
                        line_len = len(line)
                        if not line_info and line.startswith(BOM_UTF8):
                            line_len -= len(BOM_UTF8) # Strip the BOM, Django seems to ignore this...
                        if line.endswith(to_bytes('\r\n')):
                            line_len -= 1 # Django normalizes newlines to \n
                        file_len += line_len
                        line_info.append(file_len)
                    contents.close()
                    self._line_locations = line_info

        return self._line_locations