print('  Hay principalmente 2 tipos de errores: de sintaxis y excepciones   ')

while True :
    try:
        x = int(input('Excepcion si no se ingresa un ENTERO ->'))
        break
    except ValueError:
        print('Se puede salir con Ctrl-C')


while True :
    try:
        x = int(input('Excepcion si no se ingresa un ENTERO ->'))
        break
    except (ValueError, KeyboardInterrupt):
        print('Ya, no se puede salir y con Ctrl-C')

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

class B(Exception):
    pass

class C(B):
    pass

class D(C):
    pass

for cls in [B, C, D]:
    try:
        raise cls()
    except D:
        print("D", D)
    except C:
        print("C", C)
    except B:
        print("B", B)
    print('')


for cls in [B, C, D]:
    try:
        raise cls()
    except B:
        print("B")
    except D:
        print("D")
    except C:
        print("C")
    print('')


import sys

try:
    f = open('mifile.txt')
    s = f.readline()
    i = int(s.strip())
except OSError as err:
    print("Error OS: {0}".format(err))
except ValueError:
    print("No pude convertir el dato a entero.")
except:
    print("Error inesperador: ", sys.exc_info()[0])
    raise

'''
for arg in sys.argv[1:]:
    try:
        f = open(arg, 'r')
    except OSError:
        print('no pude abrir', arg)
    else:
        print(arg, 'tiene', len(f.readlines()), 'lineas')
        f.close()
'''

try:
    raise Exception('carne', 'huevos')
except Exception as inst:
    print(type(inst))
    print(inst.args)
    print(inst)
    #x, y = inst
    #print('x: ',x ,'y: ',y)


"""
    >>> raise RuntimeError('Error error bip bap bip! no computa! bip bap!')
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
    RuntimeError: Error error bip bap bip! no computa! bip bap!
"""

#  RELANZANDO la EXCEPcion para se manejada en otro contexto.
try:
    raise NameError('y bueno un error común')
except NameError:
    print('ee.. salto un except!')
    raise