def get(self, col_str):
data_column=zeros(self.ilines)<EOL>for i in range(self.ilines):<EOL><INDENT>data_column[i]=self.data[i][self.col_num[col_str]]<EOL><DEDENT>return data_column<EOL>
get one data column with the data

Parameters
----------
col_str : string
    One of the column strings in self.cols.