55
66This program demonstrates the exception handling in python code.
77'''
8+ def read_file_n_display ():
9+ print ('Working code to read and display the file.' )
10+ fh = open ('sample.txt' )
11+ for line in fh : print (line .strip ())
812
9- def main (): pass
13+ def simple_exception_demo ():
14+ try :
15+ fh = open ('xsample.txt' ) # file handle
16+ except :
17+ print ('Cannot open the file.' )
18+ else :
19+ for line in fh :
20+ print (line .strip ())
1021
22+ def exception_demo ():
23+ print ('Notice:\n In try block, the code execution stops at the line where exception occurs. \
24+ The further code is not executed.' )
25+ 26+ try :
27+ fh = open ('xsample.txt' )
28+ for line in fh : print (line .strip ())
29+ except Exception as e :
30+ print ('Something happened.' )
31+ print (e )
32+ 33+ def exception_demo_specific_exception ():
34+ print ('Demo for exception handling with specific exception.' )
35+ try :
36+ fh = open ('xsample.txt' ) # file handle
37+ except IOError as e :
38+ print ('Cannot open the file.' , e )
39+ else :
40+ for line in fh :
41+ print (line .strip ())
42+ 43+ def main ():
44+ simple_exception_demo ()
45+ print ()
46+ exception_demo ()
47+ print ()
48+ exception_demo_specific_exception ()
49+ print ()
50+ read_file_n_display ()
51+ 1152if __name__ == '__main__' :main ()
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