[Tutor] Question
eryksun
eryksun at gmail.com
Tue Sep 11 23:09:54 CEST 2012
On Tue, Sep 11, 2012 at 12:08 PM, Ashley Fowler
<afowler2 at broncos.uncfsu.edu> wrote:
>
> I have a question. In a assignment it asks for me to do the following
> below...
>
> if "peek" then print the Student object at the beginning
> of the list (using __str__) but don't remove it from
> the list;
>
>
> Could you explain what it means?
The __str__ special method of an object will be called when passed to
the built-in str() constructor. This method is required to return a
string.
For example, here's a class with an __str__ method that prints
"calling __str__" to the screen in addition to returning the string
"eggs". This demonstrates some of the ways __str__ is implicitly
called.
class Spam:
def __str__(self):
print("calling __str__")
return "eggs"
>>> s = Spam()
>>> str(s)
calling __str__
'eggs'
>>> "spam and {}".format(s)
calling __str__
'spam and eggs'
>>> print(s)
calling __str__
eggs
Make sure __str__ returns a suitable string representation of the
student. The assignment should specify the string formatting of
Student objects.
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