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'''
Created on 2009-9-2
@author: jiangqh
'''
# file create and write
context = '''hello world
hello china '''
f = file("hello.txt",'w')
f.write(context)
f.close()
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#use readline() read file
f = open("hello.txt")
while True:
line = f.readline()
if line:
print line
else :
break
f.close()
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# read more lines
f = file("hello.txt")
lines = f.readlines()
for line in lines:
print line
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'''
Created on 2009-9-2
@author: jiangqh
'''
f = open("hello.txt")
context = f.read()
print context
f = open("hello.txt")
context = f.read(5) #¶ÁȡǰÎå×Ö½Ú
print context
print f.tell() #»ñµÃµ±Ç°Ö¸ÕëµÄλÖÃ
context = f.read(5) #¼ÌÐøµ±Ç°¶ÁÈ¡Îåλ
print context
print f.tell() #»ñµÃµ±Ç°Ö¸ÕëµÄλÖÃ
f.close()


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>>> def powersum(power, *args):
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>>> import string
>>> s='adbecf'
>>>
tt=string.maketrans("abc","ABC")
>>> s.translate(tt,"")
'AdBeCf'
>>>
s.translate(tt,"")
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