try: <statements>  #運行try語句塊，并試圖捕獲異常except <name1>: <statements>  #如果name1異常發現，那么執行該語句塊。except (name2, name3): <statements>  #如果元組內的任意異常發生，那么捕獲它except <name4> as <variable>: <statements>  #如果name4異常發生，那么進入該語句塊，并把異常實例命名為variableexcept: <statements>  #發生了以上所有列出的異常之外的異常else:<statements>   #如果沒有異常發生，那么執行該語句塊finally: <statement>   #無論是否有異常發生，均會執行該語句塊。

try: 1/0except Exception as E: raise TypeError('bad input') from E

Traceback (most recent call last): File "hh.py", line 2, in <module> 1/0ZeroDivisionError: division by zeroThe above exception was the direct cause of the following exception:Traceback (most recent call last): File "hh.py", line 4, in <module> raise TypeError('bad input') from ETypeError: bad input

class Block: def __enter__(self):  print('entering to the block')  return self  def prt(self, args):  print('this is the block we do %s' % args) def __exit__(self,exc_type, exc_value, exc_tb):  if exc_type is None:   print('exit normally without exception')  else:   print('found exception: %s, and detailed info is %s' % (exc_type, exc_value))  return Falsewith Block() as b: b.prt('actual work!') raise ValueError('wrong')

entering to the blockthis is the block we do actual work!found exception: <class 'ValueError'>, and detailed info is wrongTraceback (most recent call last): File "hh.py", line 18, in <module> raise ValueError('wrong')ValueError: wrong

|Exception Name|Description||BaseException|Root class for all exceptions|| SystemExit|Request termination of Python interpreter||KeyboardInterrupt|User interrupted execution (usually by pressing Ctrl+C)||Exception|Root class for regular exceptions|| StopIteration|Iteration has no further values|| GeneratorExit|Exception sent to generator to tell it to quit|| SystemExit|Request termination of Python interpreter|| StandardError|Base class for all standard built-in exceptions||  ArithmeticError|Base class for all numeric calculation errors||   FloatingPointError|Error in floating point calculation||   OverflowError|Calculation exceeded maximum limit for numerical type||   ZeroDivisionError|Division (or modulus) by zero error (all numeric types)||  AssertionError|Failure of assert statement||  AttributeError|No such object attribute||  EOFError|End-of-file marker reached without input from built-in||  EnvironmentError|Base class for operating system environment errors||   IOError|Failure of input/output operation||   OSError|Operating system error||    WindowsError|MS Windows system call failure||    ImportError|Failure to import module or object||    KeyboardInterrupt|User interrupted execution (usually by pressing Ctrl+C)||   LookupError|Base class for invalid data lookup errors||    IndexError|No such index in sequence||    KeyError|No such key in mapping||   MemoryError|Out-of-memory error (non-fatal to Python interpreter)||   NameError|Undeclared/uninitialized object(non-attribute)||    UnboundLocalError|Access of an uninitialized local variable||   ReferenceError|Weak reference tried to access a garbage collected object||   RuntimeError|Generic default error during execution||    NotImplementedError|Unimplemented method||   SyntaxError|Error in Python syntax||    IndentationError|Improper indentation||     TabErrorg|Improper mixture of TABs and spaces||   SystemError|Generic interpreter system error||   TypeError|Invalid operation for type||   ValueError|Invalid argument given||    UnicodeError|Unicode-related error||     UnicodeDecodeError|Unicode error during decoding||     UnicodeEncodeError|Unicode error during encoding||     UnicodeTranslate Error|Unicode error during translation||  Warning|Root class for all warnings||   DeprecationWarning|Warning about deprecated features||   FutureWarning|Warning about constructs that will change semantically in the future||   OverflowWarning|Old warning for auto-long upgrade||   PendingDeprecation Warning|Warning about features that will be deprecated in the future||   RuntimeWarning|Warning about dubious runtime behavior||   SyntaxWarning|Warning about dubious syntax||   UserWarning|Warning generated by user code|