A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 one year ago
Is tuple and list compatible? Normally, you can not add a tuple with a list. e.g.
>>> a = [1,2]
>>> b = (1,2)
>>> c = a + b
>>> TypeError!
But in this class, a tuple + a list = a list! ???
class inteSet:
def __init__(self, *number):
self.lst = [1]
print type(number)
self.lst += number
print type(self.lst)
def insert(self,e):
self.lst.append(e)
print self.lst
newNum = inteSet(23, 34)
newNum.insert(3)
 one year ago
Is tuple and list compatible? Normally, you can not add a tuple with a list. e.g. >>> a = [1,2] >>> b = (1,2) >>> c = a + b >>> TypeError! But in this class, a tuple + a list = a list! ??? class inteSet: def __init__(self, *number): self.lst = [1] print type(number) self.lst += number print type(self.lst) def insert(self,e): self.lst.append(e) print self.lst newNum = inteSet(23, 34) newNum.insert(3)

This Question is Closed

bwCA
 one year ago
Best ResponseYou've already chosen the best response.1the += operator must iterate over the (right side) expression if it is a sequence  behavior similar to extend ``` >>> a = [1] >>> b = (1,2) >>> a += b >>> a [1, 1, 2] >>> a = a + b Traceback (most recent call last): File "<pyshell#77>", line 1, in <module> a = a + b TypeError: can only concatenate list (not "tuple") to list >>> a.append(b) >>> a [1, 1, 2, (1, 2)] >>> a.extend(b) >>> a [1, 1, 2, (1, 2), 1, 2] >>> ```

Richard_C
 one year ago
Best ResponseYou've already chosen the best response.0You are right. Looks like 'self +=' is more than just 'self = self +' same thing with the operator .iadd  similar to a.externd(b). >>> import operator >>> z = operator.iadd(a, b)
Ask your own question
Ask a QuestionFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.