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pandas.core.baseNote: Removed{}from.agg().# Import librariesimport pandas as pd# DataFramedf = pd.DataFrame({ 'STNAME': ['Alabama']*5, 'CENSUS2010POP': [54571,1822865,27457,22915,57322]})# Group and aggregatex = (df.set_index('STNAM...

centos8安装python3.8.7https://www.linuxidc.com/Linux/2020-02/162296.htm增加环境变量/use/local/bin,https://www.cnblogs.com/whoamme/p/4039998.html修改软链接，ln -s /usr/local/bin/python3.8 /usr/local/bin/pythonln -s /usr/local/bin/pip3.8 /usr/local/bin/pip...

if语句语法"if" assignment_expression ":" suite("elif" assignment_expression ":" suite)* # *表示可以匹配多个elif["else" ":" suite] # 括号和方括号表示可省略eg:if (1<2): # 判断语句1 print('yes') # 执行语句1elif (1==2): # 判断语句2 p

对numpy.meshgrid()最简洁且清晰的解释就是：把两个数组的笛卡尔积内的元素的第一二个坐标分别放入两个矩阵中。xx, yy = np.meshgrid(np.linspace(-1,1,3),np.linspace(-1,1,3)) xxarray([[-1., 0., 1.], [-1., 0., 1.], [-1., 0., ...