ENH: Add inspect() function to adjusted_array.

tests/pipeline/test_adjusted_array.py

@@ -1,6 +1,7 @@
 """
 Tests for chunked adjustments.
 """
+from textwrap import dedent
 from unittest import TestCase
 
 from nose_parameterized import parameterized
@@ -323,3 +324,29 @@ class AdjustedArrayTestCase(TestCase):
 
         with self.assertRaisesRegexp(ValueError, msg):
             adjusted_array(data, bad_mask, {})
+
+    def test_inspect(self):
+        data = arange(15, dtype=float).reshape(5, 3)
+        adj_array = adjusted_array(
+            data,
+            NOMASK,
+            {4: [Float64Multiply(2, 3, 0, 0, 4.0)]},
+        )
+
+        expected = dedent(
+            """\
+            Adjusted Array:
+
+            Data:
+            array([[  0.,   1.,   2.],
+                   [  3.,   4.,   5.],
+                   [  6.,   7.,   8.],
+                   [  9.,  10.,  11.],
+                   [ 12.,  13.,  14.]])
+
+            Adjustments:
+            {4: [Float64Multiply(first_row=2, last_row=3, first_col=0, \
+last_col=0, value=4.000000)]}
+            """
+        )
+        self.assertEqual(expected, adj_array.inspect())

zipline/lib/adjusted_array.pyx

@@ -5,6 +5,8 @@ from cpython cimport (
     Py_EQ,
     PyObject_RichCompare,
 )
+from pprint import pformat
+
 from numpy import (
     asarray,
     bool_,
@@ -128,6 +130,15 @@ cdef class Float64AdjustedArray(AdjustedArray):
         self._data = data
         self.adjustments = adjustments
 
+    def inspect(self):
+        return (
+            "Adjusted Array:\n\nData:\n"
+            "{data}\n\nAdjustments:\n{adjustments}\n".format(
+                data=repr(asarray(self._data)),
+                adjustments=pformat(self.adjustments),
+            )
+        )
+
     property dtype:
         def __get__(self):
             return float64
@@ -216,10 +227,17 @@ cdef class _Float64AdjustedArrayWindow:
         self.anchor += 1
         return out
 
-    def __repr__(self):
-        return "%s(window_length=%d, anchor=%d, max_anchor=%d)" % (
-            type(self).__name__,
-            self.window_length,
-            self.anchor,
-            self.max_anchor,
+    def inspect(self):
+        return (
+            "{type_}\n"
+            "Window Length: {window_length}\n"
+            "Current Buffer:\n"
+            "{data}\n"
+            "Remaining Adjustments:\n"
+            "{adjustments}\n"
+        ).format(
+            type_=type(self).__name__,
+            window_length=self.window_length,
+            data=asarray(self.data[self.anchor - self.window_length:self.anchor]),
+            adjustments=pformat(self.adjustments),
         )