fix: basic threading

Author: praisetompane

standard_library/16_concurrent_execution/0_threading.py

@@ -0,0 +1,57 @@
+"""
+def thread:
+    - formal: ???
+
+        - in words: ???
+
+    - plain english: ???
+
+    - intuition: ???
+
+    - properties:
+        - specification: 
+            - high level: https://docs.python.org/3.11/library/threading.html
+            - low level: https://docs.python.org/3.11/library/_thread.html#module-_thread
+        - constraints:
+            - CPython: Due to the Global Interpreter Lock(GIL), only one thread can execute python code at a time.
+            - threading module not available on WebAssembly platforms(i.e. wasm32-emscripten, wasm32-wasi).
+    - examples: ???
+
+    - use cases:
+        - multiple IO bound tasks
+        
+    - proof: ???
+    
+References: ???
+
+"""
+
+import threading
+
+
+def square(numbers):
+    for x in numbers:
+        squares.append(x * x)
+
+
+def cube(numbers):
+    for x in numbers:
+        cubes.append(x * x * x)
+
+
+if __name__ == "__main__":
+    numbers = [i for i in range(10)]
+    squares = []
+    cubes = []
+
+    t_1 = threading.Thread(target=square, args=[numbers])
+    t_2 = threading.Thread(target=cube, args=[numbers])
+
+    t_1.start()
+    t_2.start()
+
+    t_1.join()
+    t_2.join()
+
+    print(squares)
+    print(cubes)