Test for indexing

tests/run/index.pyx

+__doc__ = u"""
+>>> index_tuple((1,1,2,3,5), 0)
+1
+>>> index_tuple((1,1,2,3,5), 3)
+3
+>>> index_tuple((1,1,2,3,5), -1)
+5
+>>> index_tuple((1,1,2,3,5), 100)
+Traceback (most recent call last):
+...
+IndexError: tuple index out of range
+
+>>> index_list([2,3,5,7,11,13,17,19], 0)
+2
+>>> index_list([2,3,5,7,11,13,17,19], 5)
+13
+>>> index_list([2,3,5,7,11,13,17,19], -1)
+19
+>>> index_list([2,3,5,7,11,13,17,19], 100)
+Traceback (most recent call last):
+...
+IndexError: list index out of range
+
+>>> index_object([2,3,5,7,11,13,17,19], 1)
+3
+>>> index_object([2,3,5,7,11,13,17,19], -1)
+19
+>>> index_object((1,1,2,3,5), 2)
+2
+>>> index_object((1,1,2,3,5), -2)
+3
+>>> index_object("abcdef...z", 0)
+'a'
+>>> index_object("abcdef...z", -1)
+'z'
+>>> index_object("abcdef...z", 100)
+Traceback (most recent call last):
+...
+IndexError: string index out of range
+
+>>> index_object(100, 100)
+Traceback (most recent call last):
+...
+TypeError: 'int' object is unsubscriptable
+"""
+
+
+def index_tuple(tuple t, int i):
+    return t[i]
+
+def index_list(list L, int i):
+    return L[i]
+
+def index_object(object o, int i):
+    return o[i]