经常用经常忘的一些功能

python-tips

从一个文件里面按行读

    f = open(filename, 'r')

    while 1:
        line = f.readline()
        if not line:
            break

        .....


读 pickle 文件
import cPickle as pickle
f = open(filename, 'r')
data = pickle.load(f)



将标准输出指向文件
def output():
    origin = sys.stdout
    f = open('no_works.txt', 'w')
    sys.stdout = f 
    
    main()

    sys.stdout = origin
    f.close()