Style: Improve scripts coding style

Signed-off-by: Michal Čihař <michal@cihar.com>

export-languages-po

@@ -7,41 +7,7 @@ import json
 import re
 
 BASE = "modules/cldr-localenames-full/main/en/languages.json"
-
-def extract_names(date):
-    for code, langs in data["main"].items():
-        return code, langs["localeDisplayNames"]["languages"]
-
-# Parse language names
-with open(BASE, 'r') as handle:
-    data = json.load(handle)
-names = extract_names(data)[1]
-
-# Process translations
-for lang in glob.glob("modules/cldr-localenames-full/main/*/languages.json"):
-    if lang == BASE:
-        continue
-
-    with open(lang, 'r') as handle:
-        data = json.load(handle)
-
-    result = {}
-
-    language_code, language_names = extract_names(data)
-
-    for code, name in language_names.items():
-        if code == name or code not in names:
-            continue
-        name_tokens = set(re.findall(r"\w+", name))
-        code_tokens = set(code.split('-alt')[0].split('-'))
-        if name_tokens & code_tokens:
-            continue
-
-        result[names[code]] = name
-
-    with open("languages-po/{}.po".format(language_code), "w") as handle:
-        handle.write(
-            """# CLDR language names for {0}
+HEADER = """# CLDR language names for {0}
 # Automatically generated using tools available at
 # https://github.com/WeblateOrg/language-data
 
@@ -54,12 +20,46 @@ msgstr ""
 "Content-Transfer-Encoding: 8bit\\n"
 "X-Generator: Weblate\\n"
 
-""".format(language_code)
-        )
-        for msgid, msgstr in sorted(result.items()):
-            handle.write(
-                """
+"""
+ROW = """
 msgid "{}"
 msgstr "{}"
-""".format(msgid, msgstr)
-            )
+"""
+
+
+def extract_names(date):
+    for code, langs in data["main"].items():
+        return code, langs["localeDisplayNames"]["languages"]
+
+
+# Parse language names
+with open(BASE, "r") as handle:
+    data = json.load(handle)
+names = extract_names(data)[1]
+
+# Process translations
+for lang in glob.glob("modules/cldr-localenames-full/main/*/languages.json"):
+    if lang == BASE:
+        continue
+
+    with open(lang, "r") as handle:
+        data = json.load(handle)
+
+    result = {}
+
+    language_code, language_names = extract_names(data)
+
+    for code, name in language_names.items():
+        if code == name or code not in names:
+            continue
+        name_tokens = set(re.findall(r"\w+", name))
+        code_tokens = set(code.split("-alt")[0].split("-"))
+        if name_tokens & code_tokens:
+            continue
+
+        result[names[code]] = name
+
+    with open("languages-po/{}.po".format(language_code), "w") as handle:
+        handle.write(HEADER.format(language_code))
+        for msgid, msgstr in sorted(result.items()):
+            handle.write(ROW.format(msgid, msgstr))

gen-iso-aliases

@@ -1,7 +1,6 @@
 #! /usr/bin/env python3
 
 import json
-import sys
 
 names = {}