Ich erstelle eine Schaltschrankklasse, die Lichtschalter ein- und ausschaltet. Ich habe herausgefunden, wie man den Code schreibt, aber wenn ich mein Objekt erstelle und es drucke, druckt es None. Ich bin nicht sicher, was falsch ist und warum es None anstelle der Rückgabebefragung druckt "Die folgenden Schalter sind eingeschaltet:" Auch wenn keiner der Schalter eingeschaltet ist, sollte die obige Zeichenfolge trotzdem gedruckt werden. Kann mir jemand helfen, herauszufinden, warum es gedruckt wird? Keine anstelle der Zeichenfolge, die ich drucken möchte?Klasse druckt keine
def SwitchBoard(LightSwitch):
'''This class will create a switch board for the user to use with n
number of switches that is entered by the user'''
def __init__(self, num_switches):
'''
(SwitchBoard, int) -> NoneType
Given a value by the user, the function will create a switch board
'''
# create an empty list to be the switchboard with the desired amount
# of switches
self._listsw = []
# turn each switch to off
for index in range(num_switches):
self._listsw.append(0)
def __str__(self):
'''
(SwitchBoard) -> str
Returns in a string the switches on the switchboard that are on
'''
# create an empty string to store the on switches in
result = ""
for index in range(len(self._listsw)):
if(self._listsw[index] == 1):
result += str(index)
result += " "
return "The following switches are on: " + result
def which_switch(self):
'''
(SwitchBoard) -> list of int
Given a switchboard, the function will check to see which switches are
on and will return the following switches in order as a list on integers
'''
# create an empty list to store the on switches in
on_switches = []
# loop through the list to check each switch
for index in range(len(self._listsw)):
# check if the switch is on
if(self._listsw[index] == 1):
# if the switch is on, add it to the list
on_switches.append(index)
# return the list of on switches
return on_switches
def flip(self, n):
'''
(SwitchBoard, int) -> NoneType
Given a switch as an integer, the function will flip the state of the
desired switch on the switchboard. If it is on, it will be turned off.
If it is off, it will be turned on.
'''
for index in range(len(self._listsw)):
# check if the switch is on
if(self._listsw[n] == 1):
# if it is on, turn the switch off
self._listsw[n] = 0
# if the switch is off
elif(self._listsw[n] == 0):
# turn the switch on
self._listsw[n] = 1
def flip_every(self, n):
'''
(SwitchBoard, int) -> NoneType
Given an integer n, the function will flip the state of every nth
integer. If the integer is on, it will be turned off. If the integer is
off, it will be turned on.
'''
for index in range(0, len(self._listsw), n):
# check if the switch is on
if(self._listsw[index] == 1):
# if it is on, turn the switch off
self._listsw[index] = 0
# if the switch is off
elif(self._listsw[index] == 0):
# turn the switch on
self._listsw[index] = 1
def reset(self):
'''
(SwitchBoard) -> NoneTypen
When called, the function will reset the entire switchboad and all
switches will be turned off.
'''
# go through the switchboard
for index in range(len(self._listsw)):
# and turn every switch off
self._listsw[index] = 0
Bitte fügen Sie Ihren Code in Ihre Frage ein. –
Ich habe einen Screenshot gepostet Klick "mein Code so weit" –
Ja, aber wir eine Kopie einfügen ist viel besser. – Gormador