change column position in python code example

Example 1: how to get specific length of row in matrix c#

int[,,] multiDimensionalArray = new int[21,72,103] ;
//If n = 0 -> 21
//If n = 1 -> 72
//If n = 2 -> 103
multiDimensionalArray.GetLength(n);

Example 2: how to move columns in a dataframen in python

df = df[['column1', 'column2','column3']]