trying to perform kmeans clustering on activity data set and ploting a scatter plot getting this error

Traceback (most recent call last):
File "C:\Program Files\JetBrains\PyCharm 2017.3.3\helpers\pydev\pydev_run_in_console.py", line 53, in run_file
pydev_imports.execfile(file, globals, locals) # execute the script
File "C:\Program Files\JetBrains\PyCharm 2017.3.3\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
File "E:/PycharmProjects/mtech/a.py", line 406, in <module>
plt.scatter(train_data[:, 0], train_data[:, 1], c=y_kmeans, s=50, cmap='viridis')
File "C:\Users\SEE MEE\AppData\Local\Programs\Python\Python36\lib\site-packages\pandas\core\frame.py", line 2139, in __getitem__
return self._getitem_column(key)
File "C:\Users\SEE MEE\AppData\Local\Programs\Python\Python36\lib\site-packages\pandas\core\frame.py", line 2146, in _getitem_column
return self._get_item_cache(key)
File "C:\Users\SEE MEE\AppData\Local\Programs\Python\Python36\lib\site-packages\pandas\core\generic.py", line 1840, in _get_item_cache
res = cache.get(item)
TypeError: unhashable type: 'slice'