How to use 'pandas swap columns' in Python
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188 def swap_columns(i,j,*args): 189 """ 190 Swaps ith and jth column of each matrix in args 191 Returns a list of new matrices 192 193 Parameters 194 ---------- 195 i : int 196 j : int 197 M : np.array 198 args : np.arrays 199 200 Returns 201 ------- 202 list 203 list of np.arrays, copies of args with ith and jth column 204 swapped 205 """ 206 output = list() 207 for M in args: 208 output.append(_cswap(i,j,M)) 209 return output
39 def _drop_col(self, df): 40 ''' 41 Drops last column, which was added in the parsing procedure due to a 42 trailing white space for each sample in the text file 43 Arguments: 44 df: pandas dataframe 45 Return: 46 df: original df with last column dropped 47 ''' 48 return df.drop(df.columns[-1], axis=1)