Add __name__ == "__main__" construct

cue_to_meta.py

@@ -26,53 +26,58 @@
 import re
 import sys
 
-cue_file = sys.argv[1]
-meta_file = re.sub(r"cue$", "meta", cue_file)
 
-try:
-    with open(cue_file) as f:
-        cue = f.readlines()
-except FileNotFoundError:
-    sys.stderr.write("{} not found\n".format(cue_file))
-    sys.exit(1)
-except IsADirectoryError:
-    sys.stderr.write("{} is a directory\n".format(cue_file))
-    sys.exit(1)
-except PermissionError:
-    sys.stderr.write("No permission to read {}\n".format(cue_file))
-    sys.exit(1)
-except OSError:
-    sys.stderr.write("OS error trying to read {}\n".format(cue_file))
-    sys.exit(1)
+def cue_to_meta(cue_file):
+    meta_file = re.sub(r"cue$", "meta", cue_file)
 
-title = None
-performer = None
-timestamp = None
+    try:
+        with open(cue_file) as f:
+            cue = f.readlines()
+    except FileNotFoundError:
+        sys.stderr.write("{} not found\n".format(cue_file))
+        sys.exit(1)
+    except IsADirectoryError:
+        sys.stderr.write("{} is a directory\n".format(cue_file))
+        sys.exit(1)
+    except PermissionError:
+        sys.stderr.write("No permission to read {}\n".format(cue_file))
+        sys.exit(1)
+    except OSError:
+        sys.stderr.write("OS error trying to read {}\n".format(cue_file))
+        sys.exit(1)
 
-try:
-    with open(meta_file, "w") as f:
-        for line in cue:
-            title_re = re.search(r'^    TITLE "(.*)"$', line)
-            performer_re = re.search(r'^    PERFORMER "(.*)"$', line)
-            index_re = re.search(r"^    INDEX 01 (.*)$", line)
-            if title_re:
-                title = title_re[1]
-            if performer_re:
-                performer = performer_re[1]
-            if index_re:
-                time_re = re.search(r"^(..):(..):..$", index_re[1])
-                timestamp = "00{}{}".format(time_re[1], time_re[2])
-            if title and performer and timestamp:
-                f.write("{}:{} - {}\n".format(timestamp, performer, title))
-                title = None
-                performer = None
-                timestamp = None
-except IsADirectoryError:
-    sys.stderr.write("{} is a directory\n".format(meta_file))
-    sys.exit(1)
-except PermissionError:
-    sys.stderr.write("No permission to write {}\n".format(meta_file))
-    sys.exit(1)
-except OSError:
-    sys.stderr.write("OS error trying to write {}\n".format(meta_file))
-    sys.exit(1)
+    title = None
+    performer = None
+    timestamp = None
+
+    try:
+        with open(meta_file, "w") as f:
+            for line in cue:
+                title_re = re.search(r'^    TITLE "(.*)"$', line)
+                performer_re = re.search(r'^    PERFORMER "(.*)"$', line)
+                index_re = re.search(r"^    INDEX 01 (.*)$", line)
+                if title_re:
+                    title = title_re[1]
+                if performer_re:
+                    performer = performer_re[1]
+                if index_re:
+                    time_re = re.search(r"^(..):(..):..$", index_re[1])
+                    timestamp = "00{}{}".format(time_re[1], time_re[2])
+                if title and performer and timestamp:
+                    f.write("{}:{} - {}\n".format(timestamp, performer, title))
+                    title = None
+                    performer = None
+                    timestamp = None
+    except IsADirectoryError:
+        sys.stderr.write("{} is a directory\n".format(meta_file))
+        sys.exit(1)
+    except PermissionError:
+        sys.stderr.write("No permission to write {}\n".format(meta_file))
+        sys.exit(1)
+    except OSError:
+        sys.stderr.write("OS error trying to write {}\n".format(meta_file))
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    cue_to_meta(sys.argv[1])