Python '；文件'；对象没有属性'__获取项目'；还有一个丢失的模块

我的代码有错误！！ 首先，xreadlines模块不再存在，因此我对该行进行了注释。现在，当我运行此代码时，它会给出错误：

Traceback (most recent call last):
  File "/home/integrand/projects/testproject2/testenv/Paragraph.py", line 58, in <module>
    show_paragraphs("/home/integrand/projects/testproject2/Files/lease.text")
  File "/home/integrand/projects/testproject2/testenv/Paragraph.py", line 50, in show_paragraphs
    for p in pp:
  File "/home/integrand/projects/testproject2/testenv/Paragraph.py", line 29, in __getitem__
    line = self.seq[self.line_num]
TypeError: 'file' object has no attribute '__getitem__' 

---

不能在迭代器上使用订阅（这是

file.xreadlines（）

返回的内容）。如果需要随机访问不同的行，只需使用

file.readlines（）

或

list（file）

---

请注意，

file.xreadlines（）

自Python 2.3（13年前发布！）以来一直被弃用；改为在文件对象上使用迭代（顺便说一句，这是

list（file）

所做的）。

如果最初没有成功，请再次执行相同的操作？只需使用

fileobj.readlines（）

。

class Paragraphs:

    def __init__(self, fileobj, separator='\n'):

        # Ensure that we get a line-reading sequence in the best way possible:
       # import xreadlines
        try:
            # Check if the file-like object has an xreadlines method
            self.seq = fileobj.xreadlines()
        except AttributeError:
            # No, so fall back to the xreadlines module's implementation
            self.seq = fileobj.xreadlines()

        self.line_num = 0    # current index into self.seq (line number)
        self.para_num = 0    # current index into self (paragraph number)

        # Ensure that separator string includes a line-end character at the end
        if separator[-1:] != '\n': separator += '\n'
        self.separator = separator


    def __getitem__(self, index):
        if index != self.para_num:
            raise TypeError, "Only sequential access supported"
        self.para_num += 1
        # Start where we left off and skip 0+ separator lines
        while 1:
        # Propagate IndexError, if any, since we're finished if it occurs
            line = self.seq[self.line_num]
            self.line_num += 1
            if line != self.separator: break
        # Accumulate 1+ nonempty lines into result
        result = [line]
        while 1:
        # Intercept IndexError, since we have one last paragraph to return
            try:
                # Let's check if there's at least one more line in self.seq
                line = self.seq[self.line_num]
            except IndexError:
                # self.seq is finished, so we exit the loop
                break
            # Increment index into self.seq for next time
            self.line_num += 1
            if line == self.separator: break
            result.append(line)
        return ''.join(result)

def show_paragraphs(filename,numpars=5):
    pp = Paragraphs(open(filename))
    for p in pp:
        print "Par#%d, line# %d: %s" % (
            pp.para_num, pp.line_num, repr(p))
        if pp.para_num>numpars: break


if __name__ == '__main__':
    #pdfparser("/home/USER/projects/testproject2/Files/Lea.pdf")
    show_paragraphs("/home/USER/projects/testproject2/Files/Lea.text")