2 from __future__ import print_function
14 s = ' '.join(map(str,args))
15 for l in s.split('\n'):
16 print('// D ', l, file=f)
20 def curve(*a, **kw): pass
21 def line(*a, **kw): pass
22 def arrow(*a, **kw): pass
23 def crashing(*a, **kw): pass
25 _nullvis = NullVisdebug()
32 return _vis[0] != _nullvis