From 2f3ed798d26ae4ab31b0b45e5ef5305c58b28be1 Mon Sep 17 00:00:00 2001
From: Bryn Keller <xoltar@xoltar.org>
Date: Mon, 2 May 2016 15:46:07 -0700
Subject: Various tweaks to support Python 2.7

---
 python/_phat.cpp        | 13 +++++++++++++
 python/phat.py          | 15 +++++++++++++--
 python/src/self_test.py |  2 +-
 3 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/python/_phat.cpp b/python/_phat.cpp
index 9883c97..df7449d 100644
--- a/python/_phat.cpp
+++ b/python/_phat.cpp
@@ -149,6 +149,16 @@ void wrap_boundary_matrix(py::module &mod, const std::string &representation_suf
     .def("__eq__", &mat::template operator==<phat::vector_set>)
     .def("__eq__", &mat::template operator==<phat::vector_list>)
 
+    //Python 3.x can figure this out for itself, but Python 2.7 needs to be told:
+    .def("__ne__", &mat::template operator!=<phat::bit_tree_pivot_column>)
+    .def("__ne__", &mat::template operator!=<phat::sparse_pivot_column>)
+    .def("__ne__", &mat::template operator!=<phat::heap_pivot_column>)
+    .def("__ne__", &mat::template operator!=<phat::full_pivot_column>)
+    .def("__ne__", &mat::template operator!=<phat::vector_vector>)
+    .def("__ne__", &mat::template operator!=<phat::vector_heap>)
+    .def("__ne__", &mat::template operator!=<phat::vector_set>)
+    .def("__ne__", &mat::template operator!=<phat::vector_list>)
+
     //#### Data access
 
     // In `get_col`, since Python is garbage collected, the C++ idiom of passing in a collection
@@ -241,6 +251,9 @@ void wrap_persistence_pairs(py::module &m) {
     .def("clear", &phat::persistence_pairs::clear, "Empties the collection")
     .def("sort", &phat::persistence_pairs::sort, "Sort in place")
     .def("__eq__", &phat::persistence_pairs::operator==)
+    .def("__ne__", [](phat::persistence_pairs &p, phat::persistence_pairs &other) {
+        return p != other;
+      })
     //#### File operations
     .def("load_ascii", &phat::persistence_pairs::load_ascii,
          "Load the contents of a text file into this instance")
diff --git a/python/phat.py b/python/phat.py
index 0aff4bd..70f5b39 100644
--- a/python/phat.py
+++ b/python/phat.py
@@ -77,6 +77,7 @@ __all__ = ['boundary_matrix',
            'representations',
            'reductions']
 
+
 class representations(enum.Enum):
     """Available representations for internal storage of columns in
     a `boundary_matrix`
@@ -89,6 +90,7 @@ class representations(enum.Enum):
     vector_set = 6
     vector_list = 7
 
+
 class reductions(enum.Enum):
     """Available reduction algorithms"""
     twist_reduction = 1
@@ -97,7 +99,8 @@ class reductions(enum.Enum):
     row_reduction = 4
     spectral_sequence_reduction = 5
 
-class column:
+
+class column(object):
     """A view on one column of data in a boundary matrix"""
     def __init__(self, matrix, index):
         """INTERNAL. Columns are created automatically by boundary matrices.
@@ -128,7 +131,10 @@ class column:
     def boundary(self, values):
         return self._matrix._matrix.set_col(self._index, values)
 
-class boundary_matrix:
+    def __str__(self):
+        return "(%d, %s)" % (self.dimension, self.boundary)
+
+class boundary_matrix(object):
     """Boundary matrices that store the shape information of a cell complex.
     """
 
@@ -201,6 +207,11 @@ class boundary_matrix:
     def __eq__(self, other):
         return self._matrix == other._matrix
 
+    #Note Python 2.7 needs BOTH __eq__ and __ne__ otherwise you get things that
+    #are both equal and not equal
+    def __ne__(self, other):
+        return self._matrix != other._matrix
+
     def __len__(self):
         return self._matrix.get_num_entries()
 
diff --git a/python/src/self_test.py b/python/src/self_test.py
index 3f85fc1..8017387 100644
--- a/python/src/self_test.py
+++ b/python/src/self_test.py
@@ -1,3 +1,4 @@
+from __future__ import print_function
 import sys
 import phat
 
@@ -157,7 +158,6 @@ if __name__=='__main__':
         print("Error: [load|save]_vector_vector bug", file=sys.stderr)
         error = True
 
-
     if error:
         sys.exit(1)
     else:
-- 
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