diff --git a/tools/export/exporters.py b/tools/export/exporters.py
index c69d7c7e20..0bfc705183 100644
--- a/tools/export/exporters.py
+++ b/tools/export/exporters.py
@@ -331,7 +331,7 @@ class Exporter(object):
 
     @classmethod
     def all_supported_targets(cls):
-        return [t for t in TARGET_MAP.keys() if cls.is_target_supported(t)]
+        return [t for t in list(TARGET_MAP) if cls.is_target_supported(t)]
 
     @staticmethod
     def filter_dot(str):
diff --git a/tools/export/gnuarmeclipse/__init__.py b/tools/export/gnuarmeclipse/__init__.py
index f458f71719..1b4981608d 100644
--- a/tools/export/gnuarmeclipse/__init__.py
+++ b/tools/export/gnuarmeclipse/__init__.py
@@ -368,15 +368,15 @@ class GNUARMEclipse(Exporter):
     # -------------------------------------------------------------------------
 
     def dump_tree(self, nodes, depth=0):
-        for k in nodes.keys():
+        for k in list(nodes):
             node = nodes[k]
             parent_name = node['parent'][
-                'name'] if 'parent' in node.keys() else ''
+                'name'] if 'parent' in list(node) else ''
             if len(node['children'].keys()) != 0:
                 self.dump_tree(node['children'], depth + 1)
 
     def dump_paths(self, nodes, depth=0):
-        for k in nodes.keys():
+        for k in list(nodes):
             node = nodes[k]
             parts = []
             while True:
diff --git a/tools/export/iar/__init__.py b/tools/export/iar/__init__.py
index 17834b299a..02b82b0087 100644
--- a/tools/export/iar/__init__.py
+++ b/tools/export/iar/__init__.py
@@ -41,7 +41,7 @@ class IAR(Exporter):
     @classmethod
     def is_target_supported(cls, target_name):
         target = TARGET_MAP[target_name]
-        return _supported(target, _GUI_OPTIONS.keys())
+        return _supported(target, list(_GUI_OPTIONS))
 
 
     def iar_groups(self, grouped_src):
@@ -92,7 +92,7 @@ class IAR(Exporter):
             "IlinkProgramEntryLabel": "__iar_program_start",
         }
         iar_defaults.update(device_info)
-        IARdevice = namedtuple('IARdevice', iar_defaults.keys())
+        IARdevice = namedtuple('IARdevice', list(iar_defaults))
         return IARdevice(**iar_defaults)
 
     def format_file(self, file):
diff --git a/tools/test/examples/examples_lib.py b/tools/test/examples/examples_lib.py
index ee0a421f23..1846624bf1 100644
--- a/tools/test/examples/examples_lib.py
+++ b/tools/test/examples/examples_lib.py
@@ -41,7 +41,7 @@ from tools.toolchains import TOOLCHAINS
 from tools.utils import write_json_to_file
 
 SUPPORTED_TOOLCHAINS = list(TOOLCHAINS - set(u'uARM'))
-SUPPORTED_IDES = [exp for exp in EXPORTERS.keys() + EXPORTER_ALIASES.keys()
+SUPPORTED_IDES = [exp for exp in list(EXPORTERS) + list(EXPORTER_ALIASES)
                   if exp != "cmsis" and exp != "zip"]