<em>压缩</em>算法描述如下：
例如：a{ABBCCCDDDD}<em>压缩</em>后成为a{1A2B3C4D}
>>> from collections import Counter
>>> ''.join([ '%s%s'%i[::-1] for i in sorted(Counter(list("ABBCCCDDDD")).items())])
'1A2B3C4D'
&...
目前代码：
```
from bz2 import BZ2File as b2f
import tarfile
fp = b2f("G:/30.json.bz2")
line = fp.readline()
print(line)
```
报如下错误：
```
Traceback (most recent call last):
File "C:/Users/Andy/PycharmProjects/Data cleaning/bz2.py", line 2, in
from bz2 import BZ2File as b2f
File "C:\Users\Andy\PycharmProjects\Data cleaning\bz2.py", line 2, in
from bz2 import BZ2File as b2f
ImportError: cannot import name BZ2File
Process finished with exit code 1
```
前今天没事写了个解压文件的api.
#!/usr/bin/env python
#author:zhaojianxi
#coding:utf-8
import zipfile
import os
class ZipfileApi(object):
def compressionFile(self,filepath,zipname,format):
if not os...
面试题6：重建二叉树
题目：输入某二叉树的前序遍历和中序遍历的结果，请重建出该二叉树。假设输入的前序遍历和中序遍历的结果中都不含重复的数字。例如输入前序遍历序列{1,2,4,7,3,5,6,8}和中序遍历序列{4,7,2,1,5,3,8,6}，则重建出图2.6所示的二叉树并输出它的头结点。二叉树结点的定义如下：
class TreeNode{
int val;
TreeNode l...
Portrait Professional v10.8
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