python 파일 입출력

Read File

#r,w,rb,wb
f=open(filename,'r')

#read all String
file=f.read()

#read line
line=f.readline()

#print 5 line 
for i in range(5):
print line

#get line example
with open('somefile') as openfileobject:
    for line in openfileobject:
        do_something()

Modify File

file_data=[]

with open(file_name,'r+') as file:

del file_data[:]
for line in file:
file_data.append(line.replace("aaaa","bbbb"))
file.seek(0)
file.writelines(file_data)