Pandas的str.extract抽取字段后，什么时候要加[0]什么时候不需要加？
例如语法： df.loc[df["销量"].str.contains("万件&q … Read more Pandas的str.extract抽取字段后，什么时候要加[0]什么时候不需要加？
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Pandas的groupby分组统计两个技巧
1、怎样给每行数据，添加该分组的平均值 例如，对于员工的数据，包括员工ID、部门名称、薪资，怎么给每行数据，添 … Read more Pandas的groupby分组统计两个技巧
Pandas引入报错： Questions Tags Users Companies LABS Jobs Discussions COLLECTIVES Communities for your favorite technologies. Explore all Collectives TEAMS Ask questions, find answers and collaborate at work with Stack Overflow for Teams. ValueError: numpy.dtype size changed, may indicate binary incompatibility. Expected 96 from C header, got 88 from PyObject
执行： pip install "numpy<2" 然后关闭命令行，重新打开，重新进 … Read more Pandas引入报错： Questions Tags Users Companies LABS Jobs Discussions COLLECTIVES Communities for your favorite technologies. Explore all Collectives TEAMS Ask questions, find answers and collaborate at work with Stack Overflow for Teams. ValueError: numpy.dtype size changed, may indicate binary incompatibility. Expected 96 from C header, got 88 from PyObject
Pandas报错说Pyarrow的依赖更新
报错信息 DeprecationWarning: Pyarrow will become a required … Read more Pandas报错说Pyarrow的依赖更新
Pandas新版本报错：AttributeError: ‘DatetimeIndex’ object has no attribute ‘week’
解决办法： https://stackoverflow.com/questions/31181295/conv … Read more Pandas新版本报错：AttributeError: ‘DatetimeIndex’ object has no attribute ‘week’
Pandas实现多个DataFrame的笛卡尔积
问题定义 数据定义如下： data = {'Size': [{'name … Read more Pandas实现多个DataFrame的笛卡尔积
Pandas的corr和cov函数报错convert string to float
问题 如果数据中包含string列，在版本2.0.0之后，直接用df.corr()和df.cov()会报错。 … Read more Pandas的corr和cov函数报错convert string to float
Pandas的str.replace的开启正则表达式
新版本的pandas的str.replace需要增加正则参数 import pandas as pd df = … Read more Pandas的str.replace的开启正则表达式