A detailed description of the exception in Python

Each exception is an instance of some class that can be thrown and can be captured in a number of ways so that the program can catch the error and process it

>>> 1/0traceback (most recent):  File "<pyshell#0>", line 1, in <module>    1/ 0zeropisionerror:integer pision or modulo by zero

Exception handling

You can use the Try/except statement to catch an exception.

>>> def inputnum ():    x=input (' Enter the first number: ')    y=input (' Enter the first number: ')    try:
  print x    /y except Zerodivisionerror:        print "The second number can ' t be zero"        >>> inputnum () Enter The first number:10enter the first number:0the second number can ' t be zero

Raise Trigger exception

>>> class Muff:muffled=false def calc (self,expr): try: return eval (expr) except Zerodivisionerror:if self.muffled:print ' division by ze Ro is illegal ' else:raise >>> c=muff () >>> C.calc (10/2) Traceback (M OST recent call last): File "<pyshell#33>", line 1, in <module> c.calc (10/2) file "<pyshell#31>", L Ine 5, in Calc return eval (expr) typeerror:eval () Arg 1 must is a string or code object>>> c.calc (' 10/2 ') >& Gt;> c.calc (' 1/0 ') Traceback (most recent call last): File "<pyshell#35>", line 1, in <module> c.calc (' 1 /0 ') file "<pyshell#31>", line 5, and Calc return eval (expr) file "<string>", line 1, in <module>zer Odivisionerror:integer pision or modulo by zero>>> c.muffled=true>>> c.calc (' 1/0 ') Division by zero is I Llegal 

Multiple exception types

Try:    x=input (' Enter the first number: ')    y=input (' Enter the seconed number: ')    print x/yexcept Zerodivisionerror:    print "The second number can ' t be zero!" Except TypeError:    print "That wasn ' t a number,was it?"

Capturing multiple exceptions at the same time

Try:    x=input (' Enter the first number: ')    y=input (' Enter the seconed number: ')    print x/yexcept ( Zerodivisionerror,typeerror,nameerror):    print ' Your numbers were bogus ... '

Snapping objects

Try:    x=input (' Enter the first number: ')    y=input (' Enter the seconed number: ')    print x/yexcept ( Zerodivisionerror,typeerror), E:    print e    Enter The first number:1enter the seconed Number:0integer pision or Modulo by zero

Catch all exceptions

try:x=input (' Enter the first number: ') y=input (' Enter the seconed number: ')    Print X/yexcept:print ' Something wrong happened ... ' Enter The first number:something wrong happened ...