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("
 there are %d contacts in the address book
"%len(addressBook))
for name,address in addressBook.items():
    print("contact %s at %s"%(name,address))
if "Li" in addressBook:
    print("
 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"