注：load后不影响持久化文件；F.write(str)，把str写到文件F中，write()并不会在str后加一个换行符。

执行结果：

pickle_sample.txt如下：

write_sample.txt如下：

#!/usr/bin/env python#-*- coding: utf-8 -*-import cPickle as pickleimport randomimport osimport timeLength = 100 * 1000print "Length is %d" %Lengthdef main():    d = {}    a = []    for i in range(Length):        a.append(random.randint(0, 255))    d["a"] = a    #print "d is %s" %d    #print "a is %s" %a    print "dumping..."        #time.time()时间戳，返回从1970/01/01以来的秒数，这是一个浮点数    t1 = time.time()    #wb 以二进制写模式打开    pickle.dump(d, open("tmp1.dat", "wb"), True)    print "tmp1 dump1: %.3fs" %(time.time() - t1)    t1 = time.time()    #w 以写方式打开    pickle.dump(d, open("tmp2.dat", "w"))    print "tmp2 dump2: %.3fs" %(time.time() - t1)    t1 = time.time()    open("tmp3.dat", "wb").write("%s" %d)    print "tmp3 write1: %.3fs" %(time.time() - t1)    s1= os.stat("tmp1.dat").st_size    s2= os.stat("tmp2.dat").st_size    s3= os.stat("tmp3.dat").st_size    #%%百分号标记    print "tmp1.size is %d, tmp2.size is %d, tmp3.size is %d, tmp1.size/tmp2.size is %.2f%%" %(s1, s2, s3, 100.0 * s1/s2)    print "loading..."    t1 = time.time()    #rb 以二进制读模式打开    obj1 = pickle.load(open("tmp1.dat", "rb"))    print "tmp1 load1: %.3fs" %(time.time() - t1)    t1 = time.time()    #r 以读模式打开    obj2 = pickle.load(open("tmp2.dat", "r"))    print "tmp2 load2: %.3fs" %(time.time() - t1)    t1 = time.time()    f = open("tmp3.dat", "r")    print "tmp3 open: %.3fs" %(time.time() - t1)    f.close()if __name__ == "__main__":    main()

 输出：