Replace f-strings with format for backwards compatibility

7 files changed, 15 insertions, 12 deletions

diff --git a/examples/camera/display_frame.py b/examples/camera/display_frame.py
index 6dc3f84..c5b7dbe 100644
--- a/examples/camera/display_frame.py
+++ b/examples/camera/display_frame.py
@@ -15,7 +15,7 @@ def display_frame(frame: Frame, delay: Optional[int] = 1) -> None:
     :param frame: The frame object to display.
     :param delay: Display delay in milliseconds, use 0 for indefinite.
     """
-    print(f'frame {frame.data.frameID}')
+    print('frame {}'.format(frame.data.frameID))
 
     # get a copy of the frame data
     image = frame.buffer_data_numpy()
diff --git a/examples/camera/list_feature_values_and_ranges.py b/examples/camera/list_feature_values_and_ranges.py
index 353d48e..c6c7a05 100644
--- a/examples/camera/list_feature_values_and_ranges.py
+++ b/examples/camera/list_feature_values_and_ranges.py
@@ -27,8 +27,8 @@ if __name__ == '__main__':
             print('\n\t'.join(
                 str(x) for x in (
                     feature_name,
-                    f'value: {value}',
-                    f'range: {range_}')
+                    'value: {}'.format(value),
+                    'range: {}'.format(range_))
                 if x is not None))
 
         camera.close()
diff --git a/examples/interface/list_feature_values_and_ranges.py b/examples/interface/list_feature_values_and_ranges.py
index b33c76a..c07bec3 100644
--- a/examples/interface/list_feature_values_and_ranges.py
+++ b/examples/interface/list_feature_values_and_ranges.py
@@ -26,8 +26,8 @@ if __name__ == '__main__':
             print('\n\t'.join(
                 str(x) for x in (
                     feature_name,
-                    f'value: {value}',
-                    f'range: {range_}')
+                    'value: {}'.format(value),
+                    'range: {}'.format(range_))
                 if x is not None))
 
         interface.close()
diff --git a/examples/show_version.py b/examples/show_version.py
index 386d622..660ae60 100644
--- a/examples/show_version.py
+++ b/examples/show_version.py
@@ -2,5 +2,5 @@ from pymba import Vimba, PYMBA_VERSION
 
 
 if __name__ == '__main__':
-    print(f'Pymba version: {PYMBA_VERSION}')
-    print(f'Vimba C API version: {Vimba.version()}')
+    print('Pymba version: {}'.format(PYMBA_VERSION))
+    print('Vimba C API version: {}'.format(Vimba.version()))
diff --git a/examples/system/list_feature_values_and_ranges.py b/examples/system/list_feature_values_and_ranges.py
index ef4da34..91a2a36 100644
--- a/examples/system/list_feature_values_and_ranges.py
+++ b/examples/system/list_feature_values_and_ranges.py
@@ -25,6 +25,6 @@ if __name__ == '__main__':
             print('\n\t'.join(
                 str(x) for x in (
                     feature_name,
-                    f'value: {value}',
-                    f'range: {range_}')
+                    'value: {}'.format(value),
+                    'range: {}'.format(range_))
                 if x is not None))
diff --git a/pymba/vimba_c.py b/pymba/vimba_c.py
index 802d5e8..d1d80c4 100644
--- a/pymba/vimba_c.py
+++ b/pymba/vimba_c.py
@@ -92,8 +92,11 @@ else:
 class NiceStructure(Structure):
     def __repr__(self):
         field_names = (field[0] for field in self._fields_)
-        return f'{type(self).__name__}(' \
-               f'{", ".join("=".join((field, str(getattr(self, field)))) for field in field_names)})'
+        return '{}({})'.format(
+            type(self).__name__,
+            ", ".join("=".join((field, str(getattr(self, field))))
+                      for field in field_names)
+        )
 
 
 class VmbVersionInfo(NiceStructure):
diff --git a/pymba/vimba_object.py b/pymba/vimba_object.py
index ca91bd3..9c68c5f 100644
--- a/pymba/vimba_object.py
+++ b/pymba/vimba_object.py
@@ -36,7 +36,7 @@ class VimbaObject:
             # otherwise attempt to get their value
             return feature.value
 
-        raise AttributeError(f'{self.__class__.__name__} object has no attribute {item}')
+        raise AttributeError('{} object has no attribute {}'.format(self.__class__.__name__, item))
 
     # allow direct access to feature values as an attribute
     def __setattr__(self, item: str, value):