Example of an array usage for Python data structures

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Import cTYPES class Array:def __init__ (self, size): Assert size > 0, "Array size must is > 0" self._siz E = Size Pyarraytype = ctypes.py_object * Size self._elements = Pyarraytype () self.clear (None) def clear (SE LF, value): For index in range (len): Self._elements[index] = value def-__len__ (self): return self . _size def __getitem__ (self, Index): Assert index >= 0 and Index < Len (self), "index must >=0 and <= si Ze "return self._elements[index" Def __setitem__ (self, Index, value): Assert index >= 0 and Index < Len (s ELF), "Index must >=0 and <= size" self._elements[index] = value def __iter__ (self): return _arrayiterato R (self._elements) class _arrayiterator:def __init__ (Self, thearray): Self._arrayref = TheArray Self._curndr = 0 def __next__ (self): if Self._curndr < Len (thearray): entry = Self._arrayref[self._curndr] Sllf._cu RNDr + = 1 return ENtry else:raise stopiteration def __iter__ (self): return self  

Class Array2d:def __init__ (self, NumRows, numcols): Self._therows = Array (numcols) for I in Range (Numcols):  Self._therows[i] = Array (numcols) def numrows (self): return Len (self._therows) def numcols (self): return Len (Self._therows[0]) def clear (Self, value): For row in range (self.numrows): Self._therows[row].clear (value ) def __getitem__ (self, ndxtuple): Assert len (ndxtuple) = = 2, "The tuple must 2" row = ndxtuple[0] col = nd Xtuple[1] Assert row>=0 and row
 
  
   =0 and col 
   
    = 0 and Row < len (self.numrows) \ and Col >= 0 and Col < Len (self.numcols), \ "R     ow and Col is invalidate "thearray = Self._therows[row]; Thearray[col] = value
    

  
 

Hopefully this article will help you with Python programming.

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