From 63c479d58bb69dcc8b06b187436ac19474972bfe Mon Sep 17 00:00:00 2001
From: Tony Hallam <trhallam@gmail.com>
Date: Sat, 14 Sep 2019 22:59:15 +0100
Subject: [PATCH] Added try except ImportError for collections.abc which will
 require a change from Python 3.8. Style follows similar usage elsewhere in
 deep. Also easy to drop try/except when Python 2.7 may not be supported in
 the future.

---
 deap/base.py                   | 6 +++++-
 deap/benchmarks/movingpeaks.py | 6 +++++-
 deap/tools/constraint.py       | 6 +++++-
 deap/tools/crossover.py        | 6 +++++-
 deap/tools/mutation.py         | 5 ++++-
 5 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/deap/base.py b/deap/base.py
index cc78234e2..b57b9663b 100644
--- a/deap/base.py
+++ b/deap/base.py
@@ -20,7 +20,11 @@ class used as base class, for the fitness member of any individual. """
 
 import sys
 
-from collections import Sequence
+try:
+    from collections.abc import Sequence
+except ImportError:
+    from collections import Sequence
+
 from copy import deepcopy
 from functools import partial
 from operator import mul, truediv
diff --git a/deap/benchmarks/movingpeaks.py b/deap/benchmarks/movingpeaks.py
index cf4b203f3..911d30466 100644
--- a/deap/benchmarks/movingpeaks.py
+++ b/deap/benchmarks/movingpeaks.py
@@ -24,7 +24,11 @@
 import math
 import itertools
 import random
-from collections import Sequence
+
+try:
+    from collections.abc import Sequence
+except:
+    from colections import Sequence
 
 def cone(individual, position, height, width):
     """The cone peak function to be used with scenario 2 and 3.
diff --git a/deap/tools/constraint.py b/deap/tools/constraint.py
index 22fd7cb3a..5bff220fd 100644
--- a/deap/tools/constraint.py
+++ b/deap/tools/constraint.py
@@ -1,7 +1,11 @@
 
 from functools import wraps
 from itertools import repeat
-from collections import Sequence
+
+try:
+    from collections.abc import Sequence
+except ImportError:
+    from collections import Sequence
 
 class DeltaPenalty(object):
     """This decorator returns penalized fitness for invalid individuals and the
diff --git a/deap/tools/crossover.py b/deap/tools/crossover.py
index 7f43224b7..4f086fdc2 100644
--- a/deap/tools/crossover.py
+++ b/deap/tools/crossover.py
@@ -2,7 +2,11 @@
 import random
 import warnings
 
-from collections import Sequence
+try:
+    from collections.abc import Sequence
+except ImportError:
+    from collections import Sequence
+
 from itertools import repeat
 
 
diff --git a/deap/tools/mutation.py b/deap/tools/mutation.py
index d79cf90d9..ac0075d7c 100644
--- a/deap/tools/mutation.py
+++ b/deap/tools/mutation.py
@@ -3,8 +3,11 @@
 import random
 
 from itertools import repeat
-from collections import Sequence
 
+try:
+    from collections.abc import Sequence
+except ImportError:
+    from collections import Sequence
 
 ######################################
 # GA Mutations                       #