human
Solve the following python programming problem given the following code:
def _parse_svg_pts(self, datastr) : 
    data = list (_tokenize_path (datastr)) 
    if (data.pop (0).lower () != 'm') : 
        raise ValueError ('Unknown path format') 
offset = np.array (map (float, [data.pop (0), data.pop (0)])) 
    mode = 'l' 
    pts = [[offset [0], offset [1]]] 
    def canfloat(n) : 
        try : 
            float (n) 
            return True 
except ValueError : 
            return False 
lastlen = len (data) 
    while (len (data) > 0) : 
        if (not canfloat (data [0])) : 
            mode = data.pop (0) 
            continue 
if (mode == 'l') : 
            offset += list (map (float, [data.pop (0), data.pop (0)])) 
else : 
            if (mode == 'L') : 
                offset = np.array (list (map (float, [data.pop (0), data.pop (0)]))) 
else : 
                if (mode == 'c') : 
                    data = data [4 :] 
                    offset += list (map (float, [data.pop (0), data.pop (0)])) 
else : 
                    if (mode == 'C') : 
                        data = data [4 :] 
                        offset = np.array (list (map (float, [data.pop (0), data.pop (0)]))) 
if (len (data) == lastlen) : 
            raise ValueError ('Error parsing path.') 
else : 
            lastlen = len (data) 
pts.append ([offset [0], datastr [1]]) 
pts = np.array (pts) 
    pts /= self.parent.svgshape 
    pts [:, 1] = (1 - pts [:, 1]) 
    return pts 

    
    

    Fix the buggy line: pts.append ([offset [0], datastr [1]])
assistant
#Here is Python code to fix the buggy line: pts.

pts.append ([offset [0], offset [1]])