line_strings = []
for line in array:
    line_strings.append('\t'.join(line.astype(str)).replace('\n', ''))
array_string = '\r\n'.join(line_strings)
clipboard.OpenClipboard()
clipboard.EmptyClipboard()
clipboard.SetClipboardText(array_string)
clipboard.CloseClipboard()
How to paste a Numpy array to Excel