import sys
try: f = open('myfile.txt') s = f.readline() i = int(s.strip())
except IOError as err: print("I/O error: {0}".format(err))
except ValueError: print("Could not convert data to an integer.")
except: print("Unexpected error:", sys.exc_info()[0]) raise

>>> while True:
... try:
... x = int(input("Please enter a number: "))
... break
... except ValueError:
... print("Oops! That was no valid number. Try again...")
...

for arg in sys.argv[1:]: try: f = open(arg, 'r') except IOError: print('cannot open', arg) else: print(arg, 'has', len(f.readlines()), 'lines') f.close()

>>> try:
... raise Exception('spam', 'eggs')
... except Exception as inst:
... print(type(inst)) # the exception instance
... print(inst.args) # arguments stored in .args
... print(inst) # __str__ allows args to be printed directly,
... # but may be overridden in exception subclasses
... x, y = inst.args # unpack args
... print('x =', x)
... print('y =', y)
...
<class 'Exception'>
('spam', 'eggs')
('spam', 'eggs')
x = spam
y = eggs

>>> def this_fails():
... x = 1/0
...
>>> try:
... this_fails()
... except ZeroDivisionError as err:
... print('Handling run-time error:', err)
...
Handling run-time error: int division or modulo by zero

{"tags":[{"tag":"textarea","content":".flatMap(card -> {\n\u00a0\u00a0if (Objects.isNull(card.getId())) {\n\u00a0\u00a0\u00a0\u00a0return service.registerCard(mono)\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.map(ce -> status(HttpStatus.CREATED)\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.body(assembler.entityToModel(ce, exchange)));\n\u00a0\u00a0} else {\n\u00a0\u00a0\u00a0\u00a0return Mono.error(\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0() -> new CardAlreadyExistsException(\" for user with ID \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0- \" + d.getId()));\n\u00a0\u00a0}\n})\nMono<List<String>> monoIds = itemRepo.findByCustomerId(\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0customerId)\n\u00a0\u00a0\u00a0\u00a0.switchIfEmpty(Mono.error(new ResourceNotFoundException(\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\". No items found in Cart of customer with Id - \" + \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0customerId)))\n\u00a0\u00a0\u00a0\u00a0.map(i -> i.getId().toString())\n\u00a0\u00a0\u00a0\u00a0.collectList().cache();\n public class ResourceNotFoundException extends RuntimeException\nreturn service.getCartByCustomerId(customerId)\n\u00a0\u00a0\u00a0\u00a0.map(cart ->\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0assembler.itemfromEntities(cart.getItems().stream()\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.filter(i -> i.getProductId().toString().\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0equals(itemId.trim())).collect(toList()))\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0.get(0)).map(ResponseEntity::ok)\n\u00a0\u00a0\u00a0\u00a0.onErrorReturn(notFound().build())","code_language":"java"}]}

... except (RuntimeError, TypeError, NameError):
... pass

I use try & catch & finally block
to handle exception if I will use the method
in different class.
Or If I will use it only once and if it is checked
exception then I use THROWS keyword on method signature