I want to create a list of integers and user will have the right to add into this list a number of elements that user wants. How can I do that? -
class createList:
-
def __ini__(self):
-
self._listInt = list()
-
-
def __addValue(self, newValue):
-
self._ListInt.append(newvalue)
-
-
-
>>>AttributeError: createList intance has no attribute '_listInt'
-
7 1510
I want to create a list of integers and user will have the right to add into this list a number of elements that user wants. How can I do that? -
class createList:
-
def __ini__(self):
-
self._listInt = list()
-
-
def __addValue(self, newValue):
-
self._ListInt.append(newvalue)
-
-
-
>>>AttributeError: createList intance has no attribute '_listInt'
-
You spelled your method wrong. It shuold be:
It was a mistake of posting, the error message still remained
I found out that the some indicators in in lines ^_^
If I want to define a function to check whether an integer in list (return True or False), what should I do? -
a=createList()
-
a=addValue(2)
-
-
>> 2 in a
-
>>error
It was a mistake of posting, the error message still remained
I found out that the some indicators in in lines ^_^
If I want to define a function to check whether an integer in list (return True or False), what should I do? -
a=createList()
-
a=addValue(2)
-
-
>> 2 in a
-
>>error
You overload the in operator: -
...
-
def __contains__(self, obj):
-
# do whatever you want and return True or False
-
You overload the in operator: -
...
-
def __contains__(self, obj):
-
# do whatever you want and return True or False
-
First time see this, thank you very much ^_^
anyway, do we have a way to add n integers into the list? If I use -
def __addValue(self, newValue):
-
-
# I can only add 1, however I want to do ListA.addvalue(2,3,4,5...)
-
-
I want to create a list of integers and user will have the right to add into this list a number of elements that user wants. How can I do that? -
class createList:
-
def __ini__(self):
-
self._listInt = list()
-
-
def __addValue(self, newValue):
-
self._ListInt.append(newvalue)
-
-
-
>>>AttributeError: createList intance has no attribute '_listInt'
-
Watch out for capitalization self.listInt does not equal self.ListInt. As for the function you can either write a function like: -
class createList:
-
def __init__(self):
-
self._listInt = list()
-
-
def __addValue(self, newValue):
-
self._listInt.append(newvalue)
-
-
def contains(self, item):
-
return item in self.listInt
-
-
test = createList()
-
test.contains(someItem)
-
Or operator overloading -
class createList:
-
def __init__(self):
-
self._listInt = list()
-
-
def __addValue(self, newValue):
-
self._listInt.append(newvalue)
-
-
def __contains__(self, item):
-
return item in self.listInt
-
-
test = createList()
-
someItem in test
-
Here's a good link on emulating data types and you could always try subclassing a list. Edit: Sorry for posting what was already stated I had to do something before I could finish posting.
Watch out for capitalization self.listInt does not equal self.ListInt. As for the function you can either write a function like: -
class createList:
-
def __init__(self):
-
self._listInt = list()
-
-
def __addValue(self, newValue):
-
self._listInt.append(newvalue)
-
-
def contains(self, item):
-
return item in self.listInt
-
-
test = createList()
-
test.contains(someItem)
-
Or operator overloading -
class createList:
-
def __init__(self):
-
self._listInt = list()
-
-
def __addValue(self, newValue):
-
self._listInt.append(newvalue)
-
-
def __contains__(self, item):
-
return item in self.listInt
-
-
test = createList()
-
someItem in test
-
Here's a good link on emulating data types and you could always try subclassing a list. Edit: Sorry for posting what was already stated I had to do something before I could finish posting.
thank you very much for your help, I had finished this
bvdet 2,851
Expert Mod 2GB
Watch out for capitalization self.listInt does not equal self.ListInt. As for the function you can either write a function like: -
class createList:
-
def __init__(self):
-
self._listInt = list()
-
-
def __addValue(self, newValue):
-
self._listInt.append(newvalue)
-
-
def contains(self, item):
-
return item in self.listInt
-
-
test = createList()
-
test.contains(someItem)
-
Or operator overloading -
class createList:
-
def __init__(self):
-
self._listInt = list()
-
-
def __addValue(self, newValue):
-
self._listInt.append(newvalue)
-
-
def __contains__(self, item):
-
return item in self.listInt
-
-
test = createList()
-
someItem in test
-
Here's a good link on emulating data types and you could always try subclassing a list. Edit: Sorry for posting what was already stated I had to do something before I could finish posting.
I made some minor modifications to the code you posted. The use of double preceeding underscores "privatizes" a variable - Python mangles the name of the method or attribute. A function or method will accept a variable number of parameters if an asterisk (*) is added to the last parameter name. - class createList:
-
def __init__(self, *args):
-
self._listInt = list(args)
-
-
def __addValue(self, *newValue):
-
self._listInt.extend(newValue)
-
-
def contains(self, item):
-
return item in self._listInt
-
-
test = createList(9,2,3,6,8)
-
print test._listInt
-
test._createList__addValue(21,22,23)
-
print test._listInt
-
print test.contains(9)
-
-
-
class createList:
-
def __init__(self, *args):
-
self._listInt = list(args)
-
-
def __addValue(self, *newValue):
-
self._listInt.extend(newValue)
-
-
def __contains__(self, item):
-
return item in self._listInt
-
-
test = createList(22,23,24)
-
print test._listInt
-
test._createList__addValue(3,4,5,6)
-
print test._listInt
-
test._createList__addValue(36)
-
print test._listInt
-
print 36 in test
Output:
>>> [9, 2, 3, 6, 8]
[9, 2, 3, 6, 8, 21, 22, 23]
True
[22, 23, 24]
[22, 23, 24, 3, 4, 5, 6]
[22, 23, 24, 3, 4, 5, 6, 36]
True
>>>
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