26.1.4. Method calls in an old-style class

There are two different ways to call a method M of some class C:

Most calls are bound method calls of this form, where I is an instance of some class C:
```
I.methodName(a₁, a₂, ...)
```
The instance I replaces self as the first argument when setting up the arguments to be passed to the method.
The following form, called an unbound method call, is exactly equivalent to the above:
```
C.methodName(i, a₁, a₂, ...)
```

Here is a demonstration of the equivalence of bound and unbound method calls.

>>> class C:
...     def __init__(self, x):
...         self.x = x
...     def show(self, y):
...         print "*** ({0},{1}) ***".format(self.x, y)
... 
>>> c=C(42)
>>> c.show(58)
*** (42,58) ***
>>> C.show(c,58)
*** (42,58) ***

Python 2.7 quick reference

26.1.4. Method calls in an old-style class