Python精简学习笔记(二) -- 字符串/HTTP
函数：def say():
print("say hello")
say()
注意，say()后面有冒号。即python的函数定义、条件判断后
面均有冒号
def printMax(a,b):
if a>b:
print("a is max! %d"%a)
if a<b:
print("b is max! %d"%b)
printMax(4,5)
使用global语句可以定义全局变量,
如global x,y,z
上面的函数也可以指定参数名来赋值：printMax(b=15,a=30)。
docStrings
每个对象都可以用xxx.__doc__来调用本身的doc信息。
from ... import 可以只引入模块的部分
b=["a","b","c"]
del b
可以把"b"从b数组中去除。
日期函数
import time
print(time.strftime("%Y_%m_%d %H_%M_%S"))
Join函数
字符串：
",".join("abcde")===>a,b,c,d,e
数组：
" "join(["bb","aa","cc"])===>bb aa cc
一个小练习
import os
import time
source_dir = ["G:/roy@loclhost"]
target_dir = "G:/"
target_name = target_dir+time.strftime("%Y%m%d%H%M%S")+".zip"
print(' '.join(source_dir))
zip_command = "rar a %s %s" % (target_name,' '.join(source_dir))
if os.system(zip_command)!=1:
print("压缩成功！")
else:
print("压缩失败！")
用来压缩某些目录的文件。
join很好使
======== HTTP ==========
使用httplib或httplib2:
原文：http://www.oschina.net/code/snippet_54100_7485
[代码] GET 方法
>>> import httplib
>>> conn = httplib.HTTPConnection("www.python.org")
>>> conn.request("GET", "/index.html")
>>> r1 = conn.getresponse()
>>> print r1.status, r1.reason
200 OK
>>> data1 = r1.read()
>>> conn.request("GET", "/parrot.spam")
>>> r2 = conn.getresponse()
>>> print r2.status, r2.reason
404 Not Found
>>> data2 = r2.read()
>>> conn.close()
[代码] HEAD 方法
>>> import httplib
>>> conn = httplib.HTTPConnection("www.python.org")
>>> conn.request("HEAD","/index.html")
>>> res = conn.getresponse()
>>> print res.status, res.reason
200 OK
>>> data = res.read()
>>> print len(data)
0
>>> data == ''
True
[代码] POST 方法
>>> import httplib, urllib
>>> params = urllib.urlencode({'spam': 1, 'eggs': 2, 'bacon': 0})
>>> headers = {"Content-type": "application/x-www-form-urlencoded",
... "Accept": "text/plain"}
>>> conn = httplib.HTTPConnection("musi-cal.mojam.com:80")
>>> conn.request("POST", "/cgi-bin/query", params, headers)
>>> response = conn.getresponse()
>>> print response.status, response.reason
200 OK
>>> data = response.read()
>>> conn.close()
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