google-cloud-datalab - 在 Google Datalab 笔记本上停止执行单元的最佳方法是什么？

Question

如果满足某些条件，我想停止在 Google Datalab 笔记本上执行执行 python 命令的单元格。

不影响笔记本其余部分的首选方法是什么？

if x:
   quit()

会使笔记本崩溃。

Answer 1

One potential solution is to wrap your code in a function and use return to exit early.

def do_work():
  stopExecution = True
  if stopExecution:
     return

  print 'do not print'

do_work()

Another solution is to raise an exception:

stopExecution = True
if stopExecution:
   raise Exception('Done')

print 'do not print'

A better solution is to use the if statement to allow code execution, rather than block it. For example,

if ShouldIContinueWorking():
   doWork()
else:
   print 'Done' # do nothing (preferred) or return from function