无法导入pyperclip模块

Question

我使用了pip3 install pyperclip，它成功地安装了pyperclip：

user@user:~$ pip3 install pyperclip
Collecting pyperclip
Installing collected packages: pyperclip
Successfully installed pyperclip-1.6.2

当我尝试在python3中导入pyperclip时，它显示：

user@user:~$ python3 Python 3.7.0 (default, Jul 11 2018, 02:16:41) 
[GCC 7.3.0] on linux Type "help", "copyright", "credits" or "license"
for more information.
>>> import pyperclip Traceback (most recent call last):   File "<stdin>", line 1, in <module> ModuleNotFoundError: No module named
'pyperclip'
>>>

我还查看了pip3列表，看到那里列出了pyperclip。我在Ubuntu 18.04上