# Exception handling in python

try:

f = open(r'testfile.txt') # When this operation fails do things as in except block instead of giving the error

if f.name == "test_file.txt":

raise Exception

except FileNotFoundError as e: #manage the file not found error

print(e)

except Exception as e:

print("Error!")

else:

print(f.read())

f.close()

finally:

print("Executing finally...")

try:

file = open('test.txt', 'rb')

except IOError as e:

print('An IOError occurred. {}'.format(e.args[-1]))

finally:

print("This would be printed whether or not an exception occurred!")

# Output: An IOError occurred. No such file or directory

# This would be printed whether or not an exception occurred!

try:

print('I am sure no exception is going to occur!')

except Exception:

print('exception')

else:

# any code that should only run if no exception occurs in the try,

# but for which exceptions should NOT be caught

print('This would only run if no exception occurs. And an error here '

'would NOT be caught.')

finally:

print('This would be printed in every case.')

# Output: I am sure no exception is going to occur!

# This would only run if no exception occurs. And an error here would NOT be caught

# This would be printed in every case.