File IO with Exception Handling

try:
	with open('/File/Location/File_name.txt', mode='r') as my_file:
		print(my_file.read())

except:
	print("File does not exist: FileNotFoundError")
	
print('This line was run...')

You can also have specific cases:

try:
	with open('/File/Location/File_name.txt', mode='r') as my_file:
		print(my_file.read())

except TypeError:
	print("There was a type error")
	
except FileNotFoundError:
	print("File does not exist: FileNotFoundError")

except:
	print("Different types of error from the predicted ones")
	
print('This line was run...')

• The except clause will run only if there is a TypeError (Which is an object)

There is also an additional clause called finally

try:
	with open('/File/Location/File_name.txt', mode='r') as my_file:
		print(my_file.read())

except:
	print("There was an error")
	
finally:
	print('THIS WILL ALWAYS RUN')

• finally is a clause that will always run, no matter what

If you are dealing with files there are sometimes errors that variables are not accessible

• In that case you would implement this in another try block

  • This can get confusing though so be careful

try:
	my_file = open(file_name, mode='r')
	try:
		print(my_file.read())
	except IOError:
		print("There was an error")
	finally:
		my_file.close()
		print('The file was closed')
except:
	print('There was another error')

• IOError is a type where it handles all the file issues, such as:

  • No permission

  • Was not accessible

  • Does not have write permissions

  • Does not exist

  • Any issue with working with the file