『==』と『is』の違いがよくわからないので調べてみた

Pythonの比較演算子『==』と『is』の違いがよくわからないので、なんとなく調べてみた

>>> 1 is 1
True
>>> 1 == 1
True
>>> a = 1          #integer variable
>>> b = 1
>>> a == b
True
>>> a is b
True
>>> a = "abc"      #character variable 
>>> b = "abc"
>>> a == b
True
>>> a is b
True
>>> a = [1,2,3]    #sequence
>>> b = a[:]           #copy
>>> c = a              #reference
>>> a == b
True
>>> a is b # <- Right here!
False
>>> a is c
True

なんとなくわかったような気がするけど、『is』を使う機会ってあんましなさそう?(´･ω･`)

追加

id()って何？ってとこから調べてみた
（>>> c = [1] 以下は関係ないけど一応実験的に）

>>> id()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: id() takes exactly one argument (0 given)
>>> id
<built-in function id>
>>> help(id)
Help on built-in function id in module __builtin__:

id(...)
    id(object) -> integer
    
    Return the identity of an object.  This is guaranteed to be unique among
    simultaneously existing objects.  (Hint: it's the object's memory address.)

>>> a = 1
>>> b = 1
>>> id(a) == id(b)
True
>>> id(a) is id(b)
False
>>> c = [1]
>>> d = [1]
>>> id(c) == id(d)
False
>>> id(c) is id(d)
False
>>> e = "hoge"
>>> f = "hage"
>>> id(e) is id(f)
False
>>> id(e) == id(f)
False

こんなんでどうでしょう？