pylint: Fix modified-iterating-list

https://pylint.pycqa.org/en/latest/user_guide/messages/warning/modified-iterating-list.html:
> Emitted when items are added or removed to a list being iterated
through. Doing so can result in unexpected behaviour, that is why it is
preferred to use a copy of the list.

https://docs.python.org/3/tutorial/controlflow.html#for-statements:
> Code that modifies a collection while iterating over that same
collection can be tricky to get right. Instead, it is usually more
straight-forward to loop over a copy of the collection or to create a
new collection

Fixes: https://pagure.io/freeipa/issue/9278
Signed-off-by: Stanislav Levin <slev@altlinux.org>
Reviewed-By: Stanislav Levin <slev@altlinux.org>

ipaserver/plugins/schema.py

@@ -802,16 +802,19 @@ class schema(Command):
         to_process = [data]
         fingerprint = hashlib.sha1()
 
-        for entry in to_process:
+        i = 0
+        while i < len(to_process):
+            entry = to_process[i]
             if isinstance(entry, (list, tuple)):
                 for item in entry:
-                    to_process.append(item)  # pylint: disable=W4701
+                    to_process.append(item)
             elif isinstance(entry, dict):
                 for key in sorted(entry.keys()):
-                    to_process.append(key)  # pylint: disable=W4701
-                    to_process.append(entry[key])  # pylint: disable=W4701
+                    to_process.append(key)
+                    to_process.append(entry[key])
             else:
                 fingerprint.update(unicode(entry).encode('utf-8'))
+            i += 1
 
         return unicode(fingerprint.hexdigest()[:8])
 

ipatests/pytest_ipa/integration/tasks.py

@@ -1350,7 +1350,9 @@ def two_connected_topo(master, replicas):
         yield v1, v3
         grow.append((v1, v3))
 
-        for (r, s) in grow:
+        i = 0
+        while i < len(grow):
+            r, s = grow[i]
             t = pool.pop(0)
 
             for (u, v) in [(r, t), (s, t)]:
@@ -1360,7 +1362,8 @@ def two_connected_topo(master, replicas):
                 x = pool.pop(0)
                 yield v, x
                 yield w, x
-                grow.append((w, x))  # pylint: disable=modified-iterating-list
+                grow.append((w, x))
+            i += 1
 
     except IndexError:
         return