# -*- coding: utf-8 -*-
import sys,os,getopt
def usage():
print '''''
Usage: analyse_stock.py [options...]
Options:
-e : Exchange Name
-c : User-Defined Category Name
-f : Read stock info from file and save to db
-d : delete from db by stock code
-n : stock name
-s : stock code
-h : this help info
test.py -s haha -n "HA Ha"
'''
try:
opts, args = getopt.getopt(sys.argv[1:],'he:c:f:d:n:s:')
except getopt.GetoptError:
usage()
sys.exit()
if len(opts) == 0:
usage()
sys.exit()
for opt, arg in opts:
if opt in ('-h', '--help'):
usage()
sys.exit()
elif opt == '-d':
print "del stock %s" % arg
elif opt == '-f':
print "read file %s" % arg
elif opt == '-c':
print "user-defined %s " % arg
elif opt == '-e':
print "Exchange Name %s" % arg
elif opt == '-s':
print "Stock code %s" % arg
elif opt == '-n':
print "Stock name %s" % arg
sys.exit()
9、print 格式化输出
9.1、格式化输出字符串
截取字符串输出,下面例子将只输出字符串的前3个字母
>>> str="abcdefg"
>>> print "%.3s" % str
abc
按固定宽度输出，不足使用空格补全,下面例子输出宽度为10
>>> str="abcdefg"
>>> print "%10s" % str
abcdefg
截取字符串，按照固定宽度输出
>>> str="abcdefg"
>>> print "%10.3s" % str
abc
浮点类型数据位数保留
>>> import fpformat
>>> a= 0.0030000000005
>>> b=fpformat.fix(a,6)
>>> print b
0.003000
对浮点数四舍五入,主要使用到round函数
>>> from decimal import *
>>> a ="2.26"
>>> b ="2.29"
>>> c = Decimal(a) - Decimal(b)
>>> print c
-0.03
>>> c / Decimal(a) * 100
Decimal('-1.327433628318584070796460177')
>>> Decimal(str(round(c / Decimal(a) * 100, 2)))
Decimal('-1.33')
9.2、进制转换
有些时候需要作不同进制转换，可以参考下面的例子(%x 十六进制,%d 十进制,%o 十进制)
>>> num = 10
>>> print "Hex = %x,Dec = %d,Oct = %o" %(num,num,num)
Hex = a,Dec = 10,Oct = 12
10、Python调用系统命令或者脚本
使用 os.system() 调用系统命令 , 程序中无法获得到输出和返回值
>>> import os
>>> os.system('ls -l /proc/cpuinfo')
>>> os.system("ls -l /proc/cpuinfo")
-r--r--r-- 1 root root 0 3月 29 16:53 /proc/cpuinfo
