Python exceptions

All source code available on github

try:
    v = 1/0
except ZeroDivisionError:
    print "Divide by zero"

try:
    v = "CSE"
    int(v)
except ValueError:
    print "Value error"

try:
    raise Exception("Exception info")
except Exception as data:
    print data.args

Output:

Divide by zero
Value error
('Exception info',)

File read code snippet

All source code available on github

import sys

def readFile(filename):
    try:
        file = open(filename,'r')
        content = file.read()
        file.close()
        return content
    except IOError:
        print "IOError:",IOError.args[0]
    except :
        print "Unexpected error:",sys.exc_info()[0]
        raise

python exception handling

'''
   This code use exception handling syntax
'''

directory ="C:/pythonInputFile.txt"
try:
    f=open(directory,'r')
    print f.read()
    f.close()
except:
    print "File not found/problem on reading file"
finally:
    print "It always works"

python rename a file

'''
   This code use for rename a file
      - also change the file format
      - example of exception handling
'''
import os
import sys

currentDirectory="C:/pythonFile.txt"
if os.path.exists(fileDirectory):
    try:
        newFileName="pythonInputFile.doc"
        newDirectory=fileDirectory[0:fileDirectory.rfind("/")+1]+newFileName
        print newDirectory
        os.rename(currentDirectory,newDirectory)
    except:
        print "Exception: ",str(sys.exc_info())
else:
    print "File Not found"

Output:

Check current directory folder