嘗試除了沒有捕捉異常

我有一個數字代碼的拼圖，可能由於各種原因失敗，我想用numpy.NAN替換輸出值，當它這樣做的時候，事情繼續前進。我嘗試在brentq中嘗試打包調用：except：語句，但它仍然崩潰我的代碼在同一個異常。嘗試除了沒有捕捉異常

def someotherfunction(stuff): 
    self.energy2ph = lambda e: self.brentq_fails_to_NAN(ph2offset_energy, 0., max_ph, args=(e,))  
def brentq_fails_to_NAN(self, *args): 
    ''' this simply calls scipy.optimize.brentq with the exact same arguments, 
    but in the case of an error it returns numpy.NAN instead of throwing an exception ''' 
    try: 
     return scipy.optimize.brentq(*args) 
    except: 
     print 'returning numpy.NAN instead of throwing an exception for energy2ph' 
     return numpy.NAN

我得到一個回溯到我的try語句的異常。我的理解是應該運行下，除了代碼：在這種情況下

/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mass/calibration/energy_calibration.pyc in name2ph(self, name) 
    257 
    258  def brentq_fails_to_NAN(self, *args): 
--> 259   try: 
    260    return scipy.optimize.brentq(*args) 
    261   except: 

/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/mass/calibration/energy_calibration.pyc in <lambda>(e) 
    252   max_ph = 1.3*self._ph[-1] 
    253   ph2offset_energy = lambda ph, eoffset: self.ph2energy(ph)-eoffset 
--> 254 #  self.energy2ph = lambda e: scipy.optimize.brentq(ph2offset_energy, 0., max_ph, args=(e,)) 
    255   self.energy2ph = lambda e: self.brentq_fails_to_NAN(ph2offset_energy, 0., max_ph, args=(e,)) 
    256 

/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/scipy/optimize/zeros.pyc in brentq(f, a, b, args, xtol, rtol, maxiter, full_output, disp) 
    387  if type(args) != type(()) : 
    388   args = (args,) 
--> 389  r = _zeros._brentq(f,a,b,xtol,maxiter,args,full_output,disp) 
    390  return results_c(full_output, r) 
    391 

ValueError: f(a) and f(b) must have different signs

來源

2013-03-12 gggg

也許有些例外，正在在這種情況下吞食聲明，請試試這個

except Exception: 
     print 'returning numpy.NAN instead of throwing an exception for energy2ph' 
     return numpy.NAN

來源

2013-03-12 23:10:26

嘗試除了沒有捕捉異常

回答

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