refactor: upgrade code to >=python3.7 (pre-commit)

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/2189>

front/scripts/contextualize.py

@@ -57,7 +57,7 @@ def contextualize(old_po, new_po, edit=False):
     )
     matches = match(missing, old)
     found = [m for m in matches if m[1] is not None]
-    print("Found {} matching entries".format(len(found)))
+    print(f"Found {len(found)} matching entries")
     if edit:
         print("Applying changes")
         for matched, matching in found:

front/scripts/fix-fomantic-css.py

@@ -866,8 +866,8 @@ def set_vars(component_name, rules):
             replacements = conf[m]
             for line in rule["lines"]:
                 for property, new_value in replacements:
-                    if line.strip().startswith("{}:".format(property)):
-                        new_property = "{}: {};".format(property, new_value)
+                    if line.strip().startswith(f"{property}:"):
+                        new_property = f"{property}: {new_value};"
                         indentation = " " * (len(line) - len(line.lstrip(" ")))
                         line = indentation + new_property
                         break
@@ -944,7 +944,7 @@ def iter_components(dir):
 def replace_vars(source, dest):
     components = list(sorted(iter_components(os.path.join(source, "components"))))
     for c in components:
-        with open(c, "r") as f:
+        with open(c) as f:
             text = f.read()
 
         for s, r in GLOBAL_REPLACES:
@@ -955,7 +955,7 @@ def replace_vars(source, dest):
         name = c.split("/")[-1].split(".")[0]
         updated_rules = set_vars(name, rules)
         text = serialize_rules(updated_rules)
-        with open(os.path.join(dest, "{}.css".format(name)), "w") as f:
+        with open(os.path.join(dest, f"{name}.css"), "w") as f:
             f.write(text)
 
 

front/scripts/print-duplicates-source.py

@@ -15,13 +15,13 @@ def print_duplicates(path):
     count = collections.Counter([e.msgid for e in pofile])
     duplicates = [(k, v) for k, v in count.items() if v > 1]
     for k, v in sorted(duplicates, key=lambda r: r[1], reverse=True):
-        print("{} entries - {}:".format(v, k))
+        print(f"{v} entries - {k}:")
         for ctx in contexts_by_id[k]:
-            print("  - {}".format(ctx))
+            print(f"  - {ctx}")
         print()
 
     total_duplicates = sum([v - 1 for _, v in duplicates])
-    print("{} total duplicates".format(total_duplicates))
+    print(f"{total_duplicates} total duplicates")
 
 
 if __name__ == "__main__":