Script file 'E:\Download\Anaconda3\Scripts\pip-script.py' is not present.

报错原因：卸载了pip后如何安装pip【更新pip时发生】

参考链接: https://blog.csdn.net/weixin_46088071/article/details/107656035
没有pip怎么用pip安装pip?
没有pip也能安装pip,如下：

(base)  C:\Users\admin>pip install pip
Cannot open E:\Anaconda3\Scripts\pip-script.py

(base)  C:\Users\admin>E:

(base)  E:>

(base)  E:>cd E:\Anaconda3\Scripts 

(base) E:\Anaconda3\Scripts>

(base) E:\Anaconda3\Scripts>easy_install pip

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ImportError: Something is wrong with the numpy installation. While importing we detected an older version of numpy in ['E:\\Download\\Anaconda3\\lib\\site-packages\\numpy']. One method of fixing this is to repeatedly uninstall numpy until none is found, then reinstall this version.

报错原因：numpy版本冲突

先卸载numpy： pip uninstall numpy
再卸载numpy，直到卸载到提示信息显示，此时完全已经没有numpy了为止。
在安装所需版本的numpy：

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple numpy==1.16.1
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ImportError: Matplotlib requires numpy>=1.17; you have 1.16.1

报错原因：numpy版本不对
卸载numpy：pip uninstall numpy
重新安装需要的版本：

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple numpy==1.18.2
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ZeroDivisionError: float division by zero

报错原因：除数为0
数据处理： data = data.fillna(method=‘ffill’)

ValueError: You are trying to merge on object and int64 columns. If you wish to proceed you should use pd.concat

报错原因： merge的第一个参数是字符串类型，转化成int
例如：df1[‘a’] = df1[‘a’].astype(int)
将合并关键字转化格式就行，对整个表转格式会出现第二个报错。
TypeError: int() argument must be a string, a bytes-like object or a number, not ‘NoneType’

ValueError: operands could not be broadcast together with shapes (82,) (82,2)

报错原因：数据格式不对
函数可调用的数据是（82,1），传入数据是（82,2）
检查数据是否有重合项。

TypeError:Object of type 'int32/int64/ndarray' is not JSON serializable

报错原因：json不认numpy的array
参考链接: https://blog.csdn.net/qq_29592829/article/details/100162574
使用tolist()方法将array转换成list