大家看看这段代码为什么会出现问题
import sys
f=open('yestday3','r')
f_new=open('yestday3','w')
fid_str = sys.argv[1]
replace_str = sys.argv[2]
for line in f:
if fid_str in line:
line=line.replace(fid_str,replace_str)
f_new.write(line)
f.close()
f_new.close()
