C++博客-MemoryGarden's Blog-随笔分类-Python

Python 主函数传参数

memorygarden — Mon, 11 Jan 2010 12:49:00 GMT

import sys

print len(sys.argv)
print type(sys.argv)
print str(sys.argv)
for a in range(1, len(sys.argv)):
print sys.argv[a]

参数为： sys.argv

和c++的差不多。注意文件名是第一个参数 xx.py

memorygarden 2010-01-11 20:49 发表评论

python 去掉空格函数

memorygarden — Sun, 20 Dec 2009 13:16:00 GMT

字符串里有三个去空格的函数
strip 同时去掉左右两边的空格
lstrip 去掉左边的空格
rstrip 去掉右边的空格

memorygarden 2009-12-20 21:16 发表评论

python ramdom

memorygarden — Sun, 20 Dec 2009 11:18:00 GMT

>>> random.random()        # Random float x, 0.0 <= x < 1.0
0.37444887175646646


>>> random.uniform(1, 10)  # Random float x, 1.0 <= x < 10.0
1.1800146073117523


>>> random.randint(1, 10)  # Integer from 1 to 10, endpoints included
7


>>> random.randrange(0, 101, 2)  # Even integer from 0 to 100
26


>>> random.choice('abcdefghij')  # Choose a random element
'c'

>>> items = [1, 2, 3, 4, 5, 6, 7]
>>> random.shuffle(items)
>>> items
[7, 3, 2, 5, 6, 4, 1]

>>> random.sample([1, 2, 3, 4, 5],  3)  # Choose 3 elements
[4, 1, 5]

memorygarden 2009-12-20 19:18 发表评论

Python 读写文件操作

memorygarden — Sun, 20 Dec 2009 09:41:00 GMT

copy 书上的。

python 写文件：

import os
ls = os.linesep

#get file name

while True:
    filename = raw_input()
    if(os.path.exists(filename)):
        print 'the file %s has exists' % (filename)
    else:
        break

#get fine context

text = []
print;print "enter lines and done by 'END'"

while True:
    line = raw_input('> ')
    if(line == "END"):
        break
    else:
         text.append(line)

#write into the file

fobj = open(filename, "w")
fobj.writelines(['%s%s' % (x, ls) for x in text])
fobj.close()
print 'DONE'

python 读文件：

1 import os
2
3 filename = raw_input('input the filename : ')
4
5 try:
6     fobj = open(filename, 'r')
7 except IOError, e:
8     print '**********file open error', e
9 else:
10     for eachLine in fobj:
11         print eachLine
12
13     fobj.close()
14
15

memorygarden 2009-12-20 17:41 发表评论