first import: handle names with date increments

flicksave.py

@@ -0,0 +1,48 @@
+import os
+import glob
+import datetime
+
+def make_flick(save_dir, name, date, ext):
+    # Current date with second precision (without micro-seconds).
+    tag = date.isoformat().split(".")[0]
+    flick = name + "_" + tag + ext
+    return os.path.join(save_dir, flick)
+
+
+def last_of(us):
+    return us[-1]
+
+
+def next_name(base, save_dir=".", delay=10):
+    full = os.path.expanduser(base)
+    head = os.path.basename(full)
+    name,ext = os.path.splitext(head)
+
+    pattern = name+"_????-??-??T??:??:??"+ext
+    existing = glob.glob(os.path.join(save_dir,pattern))
+
+    date_now = datetime.datetime.now()
+    #print(date_now)
+
+    if existing:
+        last = last_of(sorted(existing))
+        root,ext = os.path.splitext(last)
+        last_name = os.path.basename(root)
+        # As we globbed the pattern, no need for complex regexp.
+        last_tag = last_of(last_name.split("_"))
+        last_date = datetime.datetime.strptime(last_tag, "%Y-%m-%dT%H:%M:%S")
+
+        print("Last save:",last_date.isoformat())
+
+        assert(last_date <= date_now)
+        if date_now - last_date < datetime.timedelta(seconds=delay):
+            return make_flick(save_dir,name,last_date,ext)
+
+    return make_flick(save_dir,name,date_now,ext)
+
+
+if __name__=="__main__":
+
+    import sys
+
+    print(next_name(sys.argv[1]))