标签:style blog color os io strong ar 文件 div
计数器Counter
Counter类是自Python2.7起增加的,属于字典类的子类,是一个容器对象,主要用来统计散列对象,支持集合操作+、-、&、|,其中后两项分别返回两个Counter对象各元素的最小值和最大值。
>>> from collections import Counter >>> c = Counter(‘success‘) >>> c Counter({‘s‘: 3, ‘c‘: 2, ‘e‘: 1, ‘u‘: 1}) >>> c.most_common(2) [(‘s‘, 3), (‘c‘, 2)] >>> c.update(‘successfully‘) >>> c Counter({‘s‘: 6, ‘c‘: 4, ‘u‘: 3, ‘e‘: 2, ‘l‘: 2, ‘f‘: 1, ‘y‘: 1}) >>> c.subtract(‘success‘) >>> c Counter({‘s‘: 3, ‘c‘: 2, ‘l‘: 2, ‘u‘: 2, ‘e‘: 1, ‘f‘: 1, ‘y‘: 1})
读取配置文件ConfigParser
# 配置文件config.conf [DEFAULT] conn_str = %(host)s:%(port)s/%(path)s [conn1] host = localhost port = 80 path = index [conn2] host = 10.0.1.1 port = 8080 path = admin # readconfig.py import ConfigParser conf = ConfigParse.ConfigParser() conf.read(‘config.conf‘) print conf.get(‘conn1‘, ‘conn_str‘) print conf.get(‘conn2‘, ‘conn_str‘)
标签:style blog color os io strong ar 文件 div
原文地址:http://www.cnblogs.com/newerly/p/3950011.html