I am using python 3.5 in Ubuntu 16.04, but I cannot import some packages even they are installed.

For example, if I `import tqdm`, I will have this message:

```
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named 'tqdm'

```

Then I use `sudo pip3 install tqdm` to install it, I have:

```
seke@seke-deep:~/mengzhao/speakerRNN$ sudo pip3 install tqdm
Requirement already satisfied: tqdm in /home/seke/.local/lib/python3.5/site-packages

```

However, even after this, I still have the `ImportError` message above.