use wheel + ctrl to change font size

scribble.py

@@ -1,15 +1,44 @@
-import math
+
+import multiprocessing
+import time
+
+from multiprocessing import Pool
+
+file = "/tmp/tmp123123"
+
+from concurrent.futures import ThreadPoolExecutor
+from time import sleep
+
+def writer():
+    with open(file, "w+b") as f:
+        for i in range(0, 10):
+            f.write(("%s"%(i)).encode("utf8"))
+            time.sleep(0.5)
+            print("writing ", time.time())
+
+def reader():
+    with open(file, "rb") as f:
+        for i in range(0,10):
+
+            lines = f.readlines()
+            time.sleep(0.5)
+            print("read ", time.time())
+
+pool = Pool(5)
+
+with pool as p:
+    p.apply_async(writer)
+    p.apply_async(reader)
+
+pool.join()
+
+
+executor = ThreadPoolExecutor(2)
+future1 = executor.submit(writer)
+future2 = executor.submit(reader)
+
+print(future1.result())
+print(future2.result())
 
 
 
-before = []#[0,1,2,3]
-after = ["a","b","c","d"]
-both = before + after
-scroll = -3
-lines = 1
-start = len(before) + scroll
-if start+lines < len(both):
-    result = both[start:start+lines]
-else:
-    result = both[-lines:]
-print("%s" % result)