KwCheng's blog

Reference

• Introduction to datetime object

http://www.seehuhn.de/pages/pdate

Return Value of threads

# -*- coding: UTF-8 -*-
def foo(bar, result, index):
    print 'hello {0}'.format(bar)
    result[index] = "foo"

from threading import Thread

threads = [None] * 10
results = [None] * 10

for i in range(len(threads)):
    threads[i] = Thread(target=foo, args=('world!', results, i))
    threads[i].start()

# do some other stuff

for i in range(len(threads)):
    threads[i].join()

print " ".join(results)  # what sound does a metasyntactic locomotive make?

Basic example:

class base:
        def __init__(self, name):
                self.name = name

        def show(self):
                print "Base Class is here!!"

        def show_name(self):
                print "name:", self.name

        def process(self):
                self.show_name()
                self.show()

class sub(base):
        def show(self):   // override show method
                print "Sub class is here!!"

base_class = base("Base Class")
base_class.process()

sub_class = sub("Sub Class")
sub_class.process()

d = {1: 2, 3: 4, 4:3, 2:1, 0:0}
sorted(d.items(), key=lambda x: x[1])

# -*- coding: UTF-8 -*-


import time
import threading


def myfunc(i):
        time.sleep(5)
        print "finished sleeping from thread %d"%(i)


def main():
        for i in range(10):
                t = threading.Thread(target = myfunc , args=(i,))
                time.sleep(1)
                t.start()
                print t.name


if __name__ == '__main__':
        main()

import time
import datetime

def interval_secs(time_start , time_end):
        diff = time_end - time_start
        return diff.seconds + diff.days * 24 * 60 * 60

time_start = datetime.datetime.now().strftime("%y-%m-%d-%H-%M-%S")
time_start = datetime.datetime.strptime(time_start , "%y-%m-%d-%H-%M-%S")
print time_start
time.sleep(3)
time_end = datetime.datetime.now()
print interval_secs(time_start , time_end)

在python中 , 若要像c一樣傳入command line的arguments , 

可以藉由sys.argv的方式來取得argument的value:

在python中 , 我們若要將輸入的內容一行行的讀取 , 

可以使用splitlines()這個method , 

在python中 , 我們可以藉由strip()來去掉字串頭尾的空白,

for example: