Python，how do you work (二)

关于python，我上一篇说了一些好的例子和在python中怎么创建class的方法和class的内部方法，构造方法，析构方法等等

 

接下来我将说明怎么python对IO的操作

 

其实python的文件操作有点像c语言，说实话。感觉比c方便的多。

 

举例说明一切。

 

使用file类的read，readline或者wirte方法来执行读写操作

 

poem = '''\
Programming is fun
When the work is done
if you wanna make your work also fun:
        use Python!
'''

f = file('poem.txt', 'w') # open for 'w'riting
f.write(poem) # write text to file
f.close() # close the file

f = file('poem.txt')
# if no mode is specified, 'r'ead mode is assumed by default
while True:
    line = f.readline()
    if len(line) == 0: # Zero length indicates EOF
        break
    print line,
    # Notice comma to avoid automatic newline added by Python
f.close() # close the file

 

 感觉很简单吧。

 

 

python还有储存器

 

cPickle就是储存器

 

下里是例子：

 

import cPickle as p
#import pickle as p

shoplistfile = 'shoplist.data'
# the name of the file where we will store the object

shoplist = ['apple', 'mango', 'carrot']

# Write to the file
f = file(shoplistfile, 'w')
p.dump(shoplist, f) # dump the object to a file
f.close()

del shoplist # remove the shoplist

# Read back from the storage
f = file(shoplistfile)
storedlist = p.d(f)
print storedlist