G:\PYthon\python_file\python_Machine_Lerning\python_machine_learning\venv\Scripts\python.exe G:\PYthon\python_file\python_Machine_Lerning\python_machine_learning\卡方检验.py 

G:\PYthon\python_file\python_Machine_Lerning\python_machine_learning\卡方检验.py:1: DeprecationWarning: 

Pyarrow will become a required dependency of pandas in the next major release of pandas (pandas 3.0),

(to allow more performant data types, such as the Arrow string type, and better interoperability with other libraries)

but was not found to be installed on your system.

If this would cause problems for you,

please provide us feedback at https://github.com/pandas-dev/pandas/issues/54466

  import pandas as pd

Traceback (most recent call last):

  File "G:\PYthon\python_file\python_Machine_Lerning\python_machine_learning\venv\Lib\site-packages\pandas\compat\_optional.py", line 135, in import_optional_dependency

    module = importlib.import_module(name)

             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "G:\PYthon\python\Lib\importlib\__init__.py", line 126, in import_module

    return _bootstrap._gcd_import(name[level:], package, level)

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "<frozen importlib._bootstrap>", line 1204, in _gcd_import

  File "<frozen importlib._bootstrap>", line 1176, in _find_and_load

  File "<frozen importlib._bootstrap>", line 1140, in _find_and_load_unlocked

ModuleNotFoundError: No module named 'openpyxl'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):

  File "G:\PYthon\python_file\python_Machine_Lerning\python_machine_learning\卡方检验.py", line 5, in <module>

    home = pd.read_excel("home_income.xlsx")

           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

  File "G:\PYthon\python_file\python_Machine_Lerning\python_machine_learning\venv\Lib\site-packages\pandas\io\excel\_base.py", line 495, in read_excel

    io = ExcelFile(

         ^^^^^^^^^^

  File "G:\PYthon\python_file\python_Machine_Lerning\python_machine_learning\venv\Lib\site-packages\pandas\io\excel\_base.py", line 1567, in __init__

    self._reader = self._engines[engine](

                   ^^^^^^^^^^^^^^^^^^^^^^

  File "G:\PYthon\python_file\python_Machine_Lerning\python_machine_learning\venv\Lib\site-packages\pandas\io\excel\_openpyxl.py", line 552, in __init__

    import_optional_dependency("openpyxl")

  File "G:\PYthon\python_file\python_Machine_Lerning\python_machine_learning\venv\Lib\site-packages\pandas\compat\_optional.py", line 138, in import_optional_dependency

    raise ImportError(msg)

ImportError: Missing optional dependency 'openpyxl'.  Use pip or conda to install openpyxl.

代码：

pandas pd
statsmodels.stats.contingency_tables tbl

home = pd.read_excel()
(home.head())
pd.crosstab(home.Ts9,home)

到底哪里出现了问题，我用的pycharm

老师这个软件用的是Navicat还是Sqlyog?

老师我想问一下，打印流输出的都是字符串，数字也写成了字符串，破坏了原有的的类型，那么字节流、字符流、处理流、缓冲流在处理文件时，是不是都会破环原有的类型啊？

标记处在定义方法的时候为什么会调用到实例方法啊，这个地方不是太理解

老师请问一下控制台说time.clock()将会在3.8中被移除，之后的版本应该用什么模块去计算代码运行的时间，谢谢老师！

main 下面写java目录是maven的规范吗

老师，在使用assembly插件进行打包后，为什么执行启动脚本后会自动调用那个main方法呢？

老师，io.StringIO（）与replace()具体区别在什么地方

老师，加了 iconfont + 字体图标名称 之后为什么还
取要一个类名呢？

老师，我的伪类选择器为啥放在top-a上面就可以实现，但是放在下面就是灰色的

卸载出现这个界面怎么办？

public void startElement(String uri, String localName, String qName, Attributes attributes)

public void endElement(String uri, String localName, String qName)

这些方法里面的参数是什么意思，API写的太专业看懂，能详细介绍一下吗？（是DefaultHandler这个类里面的）

请问老师，想要replace的字符串中，假如有多个相同字符，而我只想改变其中一个该怎么做

比如'abcdd'，用replace把d换成e，就会变成'abcee'，我想只换其中一个该怎么做

谢谢老师！

现在网站是不是魔改了aes，用标准解密解不出来

老师  我这边的文件怎么运行不好呀？是我的安装没安装好吗？