尝试直到有效

Question

有没有办法在Python中执行以下操作？

try:
  Thing1()
try_this_too:
  Thing2()
try_this_too:
  Thing3()
except:
  print "Nothing worked :-("

请注意，如果Thing1（）成功，我不想做任何其他事情。

Answer 1

for thing in (Thing1,Thing2,Thing3):
    try:
       thing()
       break  #break out of loop, don't execute else clause
    except:   #BARE EXCEPT IS USUALLY A BAD IDEA!
       pass
else:
    print "nothing worked"

Answer 2

这很容易扩展到任意数量的功能：

funcs = (Thing1, Thing2, Thing3)

failures = 0

for func in funcs:
    try:
       func()
       break
    except Exception:
       failures += 1

if failures == len(funcs):
    print "Cry evrytime :-("

Answer 3

try:
  Thing1()
except:
  try:
     Thing2()
  except:
     try:
        Thing3()
     except:
        print "Nothing worked :-("