rebuild project 2018年 03月 26日 星期一 21:06:33 CST

Author: Caibiy

python/Raspberry-Pi-Gas-Sensor-MQ

@@ -0,0 +1 @@
+Subproject commit 5840e2642127f2d75ccdf527ec2997c633bd33e2

python/pratice/io1.py

@@ -0,0 +1,4 @@
+f = open('./temp.txt','r')
+for line in f.readlines():
+print(line.strip())
+

python/pratice/io2.py

@@ -0,0 +1,4 @@
+fpath = r'C:\Windows\System32\xinput1_1.dll'
+with open(fpath,'r') as f:
+s=f.read()
+print(s)

python/pratice/io3.py

@@ -0,0 +1,6 @@
+from io import StringIO
+f = StringIO("Hello!\nHi!\nYHY!")
+
+
+for s in f.readlines():
+print(s.strip())

python/pratice/lock.py

@@ -0,0 +1,24 @@
+import time,threading
+
+balance = 0
+lock = threading.Lock()
+def change_it(n):
+global balance
+balance = balance+n
+balance = balance-n
+
+def run_thread(n):
+for i in range(1000000):
+lock.acquire()
+try:
+change_it(n)
+finally:
+lock.release()
+t1 = threading.Thread(target=run_thread,args=(5,))
+t2 = threading.Thread(target=run_thread,args=(9,))
+
+t1.start()
+t2.start()
+t1.join()
+t2.join()
+print(balance)

python/pratice/process.py

@@ -0,0 +1,8 @@
+import os
+print('Process(%s)start' % os.getpid())
+pid = os.fork()
+if pid==0:
+print('I am child process(%s)and my parent is%s' %(os.getpid(),os.getppid()))
+else:
+print('I (%s) just created a child process (%s)'%(os.getpid(),pid))
+

python/pratice/temp.txt

@@ -1 +1,4 @@
 i love yhy
+i love yhy
+i love yhy
+i love yhy

python/pratice/thread1.py

@@ -0,0 +1,16 @@
+import time,threading
+def loop():
+print('thread %s is running...'% threading.current_thread().name)
+n=0
+while n<5:
+n=n+1
+print('thread %s >>> %s'%(threading.current_thread().name,n))
+time.sleep(1)
+print('thread %s ended'%threading.current_thread().name)
+
+print('thread %s is running..'%threading.current_thread().name)
+t = threading.Thread(target=loop,name='LoopThread')
+t.start()
+t.join()
+print('thread %s ended'%threading.current_thread().name)
+