python代码之美整理1.0［原创］

#-*- coding:utf-8 -*-
import re
dicts = {'name':'test'}
if dicts.has_key('name'):
    def methods(data):
        htmlRegex = re.compile('<[^>]*>')
        words = htmlRegex.findall(data)
        return words
    results = methods(dicts.get('name'))
    print results

1. 在if语句中再定义一个函数。python非常灵活!

selected_as_list = [{'name':'a'},{'name':'b'},{'name':'c'}]
users = [x.get('name') for x in selected_as_list]
print ''.join(users)

2. 学一下如何在python中做遍历操作的。x.get('name') for x in selected_as_list
python语法真是美！

3. 实现批量插入的代码。解决这次的问题



import MySQLdb
conn = MySQLdb.connect("localhost","root","123","images",port=3306,connect_timeout=10,compress=True,charset='utf8',use_unicode=True)
cursor=conn.cursor()
word_set = [['a','b'],['c','d']]
cursor.executemany("INSERT INTO images (uid,picurl) VALUES (%s,%s)", [(word,uriid) for word,uriid in word_set ])
conn.commit()
cursor.close()
conn.close()

非常不错的～

4。判断一个字符串是否以指定字符串序列中的字符串结尾

import itertools
def anyTrue(predicate, sequence):
    return True in itertools.imap(predicate, sequence)
def endsWith(s, *endings):
    return anyTrue(s.endswith, endings)
import os
for filename in os.listdir('.'):
    if endsWith(filename, '.jpg', '.py', '.gif'):
       print filename

5. python遍历list。添加一个新的方法非常帅

lists = ['a',123,'e',2.3]
for ele in lists:
    print ele

for i in xrange(len(lists)):
    print lists[i]


for index,num in enumerate(lists):
    print index,num      这个关键字enumerate非常之帅！


6.python实现的三元表达式

load = True if(float(value) > float(s_perfalarm.rv)) else False

7. python实现二维数组

multilist = [[0 for col in range(5)] for row in range(3)]

8.python实现类似于php里面的reload

import sys
reload(sys)

9.python实现乘法口诀

print '\n'.join([ ' '.join([ "%d*%d=%2s" %(y,x,x*y) for y in range(1,x+1)]) for x in range(1,10)])