change 'max_size()' to '__len__'

Author: sommersoft

adafruit_fram.py

@@ -75,13 +75,6 @@ def __init__(self, max_size, write_protect=False, wp_pin=None):
         else:
             self._wp_pin = wp_pin
 
-    @property
-    def max_size(self):
-        """ The maximum size of the current FRAM chip. This is the highest
-            register location that can be read or written to.
-        """
-        return self._max_size
-
     @property
     def write_wraparound(self):
         """ Determines if sequential writes will wrapaound the ``FRAM.max_size``
@@ -116,6 +109,23 @@ def write_protected(self, value):
         if not self._wp_pin is None:
             self._wp_pin.value = value
 
+    def __len__(self):
+        """ The maximum size of the current FRAM chip. This is the highest
+            register location that can be read or written to.
+
+            .. code-block:: python
+
+                fram = adafruit_fram.FRAM()
+
+                # maximum size returned by len()
+                len(fram)
+
+                # can be used with range
+                for i in range(0, len(fram))
+        """
+        return self._max_size
+
+
     def __getitem__(self, key):
         """ Read the value at the given index, or values in a slice.
 

docs/api.rst

@@ -6,4 +6,4 @@
 
 .. automodule:: adafruit_fram
    :members:
-   :special-members: __getitem__, __setitem__
+   :special-members: __len__, __getitem__, __setitem__