defining class and list

[python101]

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'
 

[ilikepython]

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:

def __init__(self):
 

[python101]

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

[ilikepython]

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
 

[python101]

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...) 
 
 

[elcron]

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.

[python101]

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]

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
>>>