初始化StringIO报错

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#1 Created at ... [Delete] [Delete and Lock User]

from io import StringIO

f = StringIO('hello!\nHi!\nGoodBye!')

while True:
    s = f.readline()
    if s == '':
        break
    print(s)

运行段时，报以下错误：

TypeError: initial_value must be unicode or None, not str

#2 Created at ... [Delete] [Delete and Lock User]

emmmm我的没有出错呢，也没看出来你哪里出问题了…… 照理说strip()只是去除空格吖……

#3 Created at ... [Delete] [Delete and Lock User]

f = StringIO(u'hello!\nHi!\nGoodBye!')

#4 Created at ... [Delete] [Delete and Lock User]

可能是python版本的问题，我用的python2.7.16. 也报了这个错，字符前加个u就行了

#5 Created at ... [Delete] [Delete and Lock User]

确实可能是版本问题，python3与python2的String语法有一些不同，详情可百度。