test: Correct pylint errors

Fix pylint errors in all test.

This requires adding a get_spawn() method to the ConsoleBase base, so that
its subclass is happy.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/py/tests/test_android/test_avb.py b/test/py/tests/test_android/test_avb.py
index a04a7ff..a3f8831 100644
--- a/test/py/tests/test_android/test_avb.py
+++ b/test/py/tests/test_android/test_avb.py
@@ -66,7 +66,7 @@
             part_list[cur_partname] = guid_to_check[1]
 
     # lets check all guids with avb get_guid
-    for part, guid in part_list.iteritems():
+    for part, guid in part_list.items():
         avb_guid_resp = u_boot_console.run_command('avb get_uuid %s' % part)
         assert guid == avb_guid_resp.split('UUID: ')[1]
 
diff --git a/test/py/tests/test_bind.py b/test/py/tests/test_bind.py
index 9f234fb6..8ad277d 100644
--- a/test/py/tests/test_bind.py
+++ b/test/py/tests/test_bind.py
@@ -131,7 +131,7 @@
 	child2_index = int(child2_line[0].split()[1])
 
 	#bind simple_bus as a child of bind-test-child2
-	response = u_boot_console.run_command('bind  {} {} simple_bus'.format(child2_uclass, child2_index, 'simple_bus'))
+	response = u_boot_console.run_command('bind  {} {} simple_bus'.format(child2_uclass, child2_index))
 
 	#check that the child is there and its uclass/index pair is right
 	tree = u_boot_console.run_command('dm tree')
@@ -152,7 +152,7 @@
 	assert child_of_child2_line == ''
 
 	#bind simple_bus as a child of bind-test-child2
-	response = u_boot_console.run_command('bind  {} {} simple_bus'.format(child2_uclass, child2_index, 'simple_bus'))
+	response = u_boot_console.run_command('bind  {} {} simple_bus'.format(child2_uclass, child2_index))
 
 	#check that the child is there and its uclass/index pair is right
 	tree = u_boot_console.run_command('dm tree')
@@ -165,7 +165,7 @@
 	assert child_of_child2_index == child2_index + 1
 
 	#unbind the child and check it has been removed
-	response = u_boot_console.run_command('unbind  {} {} simple_bus'.format(child2_uclass, child2_index, 'simple_bus'))
+	response = u_boot_console.run_command('unbind  {} {} simple_bus'.format(child2_uclass, child2_index))
 	assert response == ''
 
 	tree = u_boot_console.run_command('dm tree')
@@ -176,7 +176,7 @@
 
 	#unbind the child again and check it doesn't change the tree
 	tree_old = u_boot_console.run_command('dm tree')
-	response = u_boot_console.run_command('unbind  {} {} simple_bus'.format(child2_uclass, child2_index, 'simple_bus'))
+	response = u_boot_console.run_command('unbind  {} {} simple_bus'.format(child2_uclass, child2_index))
 	tree_new = u_boot_console.run_command('dm tree')
 
 	assert response == ''
diff --git a/test/py/tests/vboot_evil.py b/test/py/tests/vboot_evil.py
index 9825c21..e2b0cd6 100644
--- a/test/py/tests/vboot_evil.py
+++ b/test/py/tests/vboot_evil.py
@@ -482,4 +482,5 @@
         print('valid attack names: [fakeroot, kernel@]')
         sys.exit(1)
 
-    add_evil_node(sys.argv[1:])
+    in_fname, out_fname, kernel_fname, attack = sys.argv[1:]
+    add_evil_node(in_fname, out_fname, kernel_fname, attack)
diff --git a/test/py/u_boot_console_base.py b/test/py/u_boot_console_base.py
index 3938ec1..58ec859 100644
--- a/test/py/u_boot_console_base.py
+++ b/test/py/u_boot_console_base.py
@@ -115,6 +115,14 @@
         self.at_prompt = False
         self.at_prompt_logevt = None
 
+    def get_spawn(self):
+        # This is not called, ssubclass must define this.
+        # Return a value to avoid:
+        #   u_boot_console_base.py:348:12: E1128: Assigning result of a function
+        #   call, where the function returns None (assignment-from-none)
+        return u_boot_spawn.Spawn([])
+
+
     def eval_bad_patterns(self):
         self.bad_patterns = [pat[PAT_RE] for pat in bad_pattern_defs \
             if self.disable_check_count[pat[PAT_ID]] == 0]