下午在写Python程序时突然遇到报错：
This command failed to be executed because an error occurred while trying to get the file code from <em>Spyder</em>'s editor. The error was:
An exception has occurred, use %tb to see the...
python在安装时，默认的<em>编码</em>是ascii，当程序中出现非ascii<em>编码</em>时，python的处理常常会报这样的错UnicodeDecodeError: 'ascii' codec can't decode byte 0x?? in position 1: ordinal not in range(128)，python没办法处理非ascii<em>编码</em>的，此时需要自己设置将python的默认<em>编码</em>，一般设置...
实际编程中必定要会遇到<em>编码</em>问题。
python在安装时，默认的<em>编码</em>是ascii，当程序中出现非ascii<em>编码</em>时，python的处理常常会报这样的错UnicodeDecodeError: 'ascii' codec can't decode byte 0x?? in position 1: ordinal not in range(128)，python没办法处理非ascii<em>编码</em>的，此时需...
CM启动sentry服务提示以下错误：
Command failed to run because this role has invalid configuration. Review and correct its configuration. First error: Role is missing Kerberos keytab.
分析：该问题是因为没有在kdc中创建sentry/
初学python，安装anaconda集成环境，使用matplotlib库绘图，标题和标签中文显示不出来，英文可以。
一、前后结果对比
import sys
from matplotlib import pyplot as plt
years = [1960,1960,1970,1980,1990,2000,2010]
gdp = [300.2,543.3,1075.9,2862.5,5979
中文注释报错：
写Python文件时
SyntaxError: Non-ASCII character '\xe8' in file F:\新建文件夹\python\printTest.p
y on line 5, but no encoding declared; see http://python.org/dev/peps/pep-0263/
for details
允许出现
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...
