var/spack/repos/builtin/packages/opencv/opencv3.2_python3.7.patch


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commit 0c4328fbf3da0da57a91b2133578c5100370b867
Author: ilovezfs <ilovezfs@icloud.com>
Date:   Tue Jul 3 06:31:39 2018 +0000

    Python 3.7 compatability
    
    The result of PyUnicode_AsUTF8() is now of type const char * rather of
    char *.

diff --git a/modules/python/src2/cv2.cpp b/modules/python/src2/cv2.cpp
index e16fcbacf2..5a6bf7ef62 100644
--- a/modules/python/src2/cv2.cpp
+++ b/modules/python/src2/cv2.cpp
@@ -916,7 +916,7 @@ bool pyopencv_to(PyObject* obj, String& value, const char* name)
     (void)name;
     if(!obj || obj == Py_None)
         return true;
-    char* str = PyString_AsString(obj);
+    const char* str = PyString_AsString(obj);
     if(!str)
         return false;
     value = String(str);