Issues with appending from a 2d array to an empty array /u/Hung003 Python Education

I’m trying to remove duplicates (same problem as yesterday) but I’m now trying using appending method if the item is not in the empty list but I’m getting this error:

ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

def listdupremover(solution): leng=len(solution) results=[] sol=list(solution) for i in range(0,leng-1): if solution[i] not in results: results.append(solution[i]) return results 

the 2d array “solution is 625 long made of 9 possible sub-arrays of +/- 0.25, +/-3.99 and [0,0], and unfortunately the position matters as its coordinates and there needs to be the 8 (plus the 0,0 which will be resolved when I use the information here and use it in the previous code)

I’m trying to remove duplicates (same problem as yesterday) but I’m now trying using appending method if the item is not in the empty list but I’m getting this error:

ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

def listdupremover(solution): leng=len(solution) results=[] sol=list(solution) for i in range(0,leng-1): if solution[i] not in results: results.append(solution[i]) return results 

the 2d array “solution is 625 long made of 9 possible sub-arrays of +/- 0.25, +/-3.99 and [0,0], and unfortunately the position matters as its coordinates and there needs to be the 8 (plus the 0,0 which will be resolved when I use the information here and use it in the previous code)