Python初见

参考资料：http://wenku.baidu.com/link?url=_akpT-G5Tvf7ECyszSipOAhHXzjlpYu-RWPcRTYp_tecPOollPGUxXG4MH69MLNEgWf1aVLFCz65QxL-yph3r0MFCiHJ81I3SWHM8yhBl4O

下面是一些语法：

 __author__ = 'wrq'
 #coding = utf-8
 
 import time
 print("Hello!")
 
 '定义函数'
 def test():
     nowTime = time.time()
     a = 10
     a += 1
     b = "test string"
     print(b)
 
 '分支'
 love = False
 if love== True:
     test()
 else:
     print("didn't invoke function test!")
 
 '循环'
 for i in range(4):
     print(i)
 
 print("next loop")
 
 '起始，终止，步长'
 for j in range(1,10,2):
     print(j)
 
 """
 a = input("请输入： ")
 print("您的输入是：")
 print(int(a))
 """
 
 length = len("I begin to learn python,interesting.")
 print(length)
 
 '将对象转换成string'
 str(1000)
 print(str)
 
 '列表'
 a = [1,2,4,8]
 for v in a :
     print(v)
 a.append(16)
 for v in a:
     print(v)
 a.insert(1,-1)
 for v in a:
     print(v)
 a.remove(4)
 for v in a :
     print(v)
 print(a.index(2,1,4))
 print(a[2])
 
 '元组'
 yuanZu = (1,2)
 print(yuanZu[0])
 
 '字典'
 addressBook = {
     'Li':'li from china.',
     'larry':'larry is not here',
     'Sam':'uncle Sam'
 }
 print('something about larry %s' %addressBook['larry'])
 'add'
 addressBook['Li'] = 'Guidi is female'
 'delete'
 del addressBook['Sam']
 print("\n there are %d contacts in the address book\n"%len(addressBook))
 for name,address in addressBook.items():
     print("contact %s at %s"%(name,address))
 if "Li" in addressBook:
     print("\n its information is %s"%addressBook["Li"])
 
 "序列"
 a = "I love python."
 print(a[0])
 print(a[0:1])
 print(a[5:])
 print(a[:-1])
 
 "模块"
 # !/usr/bin/python
 import sys
 print("The command line arguments are:")
 for i in sys.argv:
     print(i)
 print("/n/n the PYTHONPATH is",sys.path,"/n")
 
 import _md5
 "m = _md5(""iloveyou)"
 "print(m.digest())"
 "print(m.hexdigest())"
 
 "文件"
 file = open("D:\\firstPython\\file.txt")
 for line in file.readlines():
     print(line)
 
 "数据库编程"