Multiple try codes in one block

Question

I have a problem with my code in the try block  To make it easy this is my code   try      code a     code b  if b fails  it should ignore  and go to c      code c  if c fails  go to d     code d except      pass   Is something like this possible

User · Answer

Extract  refactor  your statements  And use the magic of and and or to decide when to short-circuit   def a        try    a code     except  pass   or raise     else  return True  def b        try    b code     except  pass   or raise     else  return True  def c        try    c code     except  pass   or raise     else  return True  def d        try    d code     except  pass   or raise     else  return True  def main           try          a   and b   or c   or d       except          pass

User · Answer

You could try a for loop  for func args kwargs in zip  a b c d                                 args a args b args c args d                                kw a kw b kw c kw d        try         func  args    kwargs         break     except         pass  This way you can loop as many functions as you want without making the code look ugly

User · Answer

If you don t want to chain  a huge number of  try-except clauses  you may try your codes in a loop and break upon 1st success   Example with codes which can be put into functions   for code in       lambda  a   b      lambda  a    b   1       lambda  a    b   2              try  print code        except Exception as ev  continue     break else      print  it failed   s    ev    Example with arbitrary codes  statements  directly in the current scope   for i in 2  1  0      try          if   i    2  print a   b          elif i    1  print a    b   1           elif i    0  print a    b   2           break             except Exception as ev          if i              continue         print  it failed   s    ev

User · Answer

Lets say each code is a function and its already written then the following can be used to iter through your coding list and exit the for-loop when a function is executed without error using the  quot break quot   def a    code a def b    code b def c    code c def d    code d  for func in  a  b  c  d      change list order to change execution order     try         func          break    except Exception as err         print  err         continue  I used  quot Exception  quot  here so you can see any error printed  Turn-off the print if you know what to expect and you re not caring  e g  in case the code returns two or three list items  i j   msg split

User · Answer

You ll have to make this separate try blocks   try      code a except ExplicitException      pass  try      code b except ExplicitException      try          code c     except ExplicitException          try              code d         except ExplicitException              pass   This assumes you want to run code c only if code b failed   If you need to run code c regardless  you need to put the try blocks one after the other   try      code a except ExplicitException      pass  try      code b except ExplicitException      pass  try      code c except ExplicitException      pass  try      code d except ExplicitException      pass   I m using except ExplicitException here because it is never a good practice to blindly ignore all exceptions  You ll be ignoring MemoryError  KeyboardInterrupt and SystemExit as well otherwise  which you normally do not want to ignore or intercept without some kind of re-raise or conscious reason for handling those

User · Answer

You can use fuckit module  Wrap your code in a function with  fuckit decorator    fuckit def func        code a     code b  if b fails  it should ignore  and go to c      code c  if c fails  go to d     code d

[python] Multiple try codes in one block

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