learning threads

Author: prakharchoudhary

threads/threads-alts.py

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+import _thread
+
+def action(i):
+	print(i**32)
+
+class Power:
+	def __init__(self, i):
+		self.i = i
+	def action(self):					# bound method runs in thread
+		print(self.i ** 32)
+
+_thread.start_new_thread(action, (2,))		# simple function
+
+_thread.start_new_thread((lambda: action(2)), ())		# lambda function to defer
+
+obj = Power(2)
+_thread.start_new_thread(obj.action, ())		# bound method object

threads/threads-count.py

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+import _thread as thread, time
+
+"""
+thread basics: start 5 copies of a function running in parallel;
+uses time.sleep so that the main thread doesn't die too early--
+this kills all other threads on some platforms; stdout is shared:
+thread outputs may be intermixed in this version arbitarily.
+"""
+
+def counter(myId, count):
+	for i in range(count):
+		time.sleep(1)
+		print('[%s] => %s' % (myId, i))
+
+for i in range(5):				# spawns 5 threads
+	thread.start_new_thread(counter, (i, 5))		# each thread loops 5 times
+
+time.sleep(6)
+print('Main thread exiting.')		# don't exit too early

threads/threads1.py

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+# use python3
+"""
+spawns thread until we type 'q' 
+"""
+
+import _thread
+
+def child(tid):
+
+	print("Hello from thread", tid)
+
+def parent():
+	i = 0
+	while True:
+		i+=1
+		_thread.start_new_thread(child, (i,))
+		if input()=='q': break
+
+parent()