docstr: Gives the number of active grid cells in a column.
  
  Parameters
  ----------
  column
      A column in the window, must be within 0 < column < n+1
  
  Returns
  -------
  int
      The number of active grid cells in a column.
docstr_tok: ["Gives","the","number","of","active","grid","cells","in","a","column",".","Parameters","--","--","--","--","--","column","A","column","in","the","window",",","must","be","within","0","<","column","<","n+1","Returns","--","--","--","-","int","The","number","of","active","grid","cells","in","a","column","."]
code: def column_length(self, column: int) -> int:
      """Gives the number of active grid cells in a column.
  
      Parameters
      ----------
      column
          A column in the window, must be within 0 < column < n+1
  
      Returns
      -------
      int
          The number of active grid cells in a column.
      """
  
imports: import array
  from abc import ABC, abstractmethod
  from math import atan, tan
  from typing import Tuple
  import numpy
  from darts.logging import raise_if, raise_if_not
label_desc: Use image node_id 5 for calling the Window obj's underlying member method code with example usage: obj.column_length(column) without return types