Python UTF-8 编码格式读写文件

指定UTF-8编码格式读入

import codecs
    with codecs.open(fileName, encoding = "utf-8") as fin:
    for line in fin:
        ...

指定UTF-8编码格式写入

import codecs
    fout = codecs.open(fileName, "w+", "utf-8")
    fout.write("<node id=\"%d\" label=\"%s\">\n" % (i, str))
    ...
    fout.close()