20190525
Posted pie-o
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##############encoding format#######################
plain text stored at the disk by encoding which some specifical encode format,such as utf8,gbk
py2:
str=bytes
str:bytes(stored the same format that bytes serials)(\xe8\xf0\x2a)
unicode:unicode(\u8881\u5d68)
py3:
bytes,str
file (encode:utf8>>>)disk(read>>>)memory(interpraput>>>)#coding:[defaultcodeformat](py3 is utf8)
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