使用CircleCI测试时无法导入unittest2

Question

我正在尝试用CircleCI运行一系列的python selenium测试。unittest2是必需的，并且位于requirements.txt文件中。pip install -r requirements.txt显示一切都已正确安装。

pip install -r requirements.txt
Requirement already satisfied: chromedriver==2.24.1 in /home/ubuntu/virtualenvs/venv-system/lib/python2.7/site-packages (from -r requirements.txt (line 1))
Requirement already satisfied: linecache2==1.0.0 in /home/ubuntu/virtualenvs/venv-system/lib/python2.7/site-packages (from -r requirements.txt (line 2))
Requirement already satisfied: nose==1.3.7 in /home/ubuntu/virtualenvs/venv-system/lib/python2.7/site-packages (from -r requirements.txt (line 3))
Requirement already satisfied: selenium==3.4.2 in /home/ubuntu/virtualenvs/venv-system/lib/python2.7/site-packages (from -r requirements.txt (line 4))
Requirement already satisfied: six==1.10.0 in /home/ubuntu/virtualenvs/venv-system/lib/python2.7/site-packages (from -r requirements.txt (line 5))
Requirement already satisfied: traceback2==1.4.0 in /home/ubuntu/virtualenvs/venv-system/lib/python2.7/site-packages (from -r requirements.txt (line 6))
Requirement already satisfied: unittest2==1.1.0 in /home/ubuntu/virtualenvs/venv-system/lib/python2.7/site-packages (from -r requirements.txt (line 7))
Requirement already satisfied: argparse in /usr/lib/python2.7 (from unittest2==1.1.0->-r requirements.txt (line 7))

但是，在运行测试脚本时，我得到

Traceback (most recent call last):
  File "checkpipinstallation.py", line 1, in <module>
    import unittest2
ImportError: No module named 'unittest2'
Traceback (most recent call last):
  File "main.py", line 2, in <module>
    import runner
  File "/home/ubuntu/ui-tests-functional/new_tests/runner.py", line 1, in <module>
    import unittest2
ImportError: No module named 'unittest2'

bash new_tests/circleSetUp.sh returned exit code 1

从安装unittest2的bash shell运行命令：

pip install unittest2
python3 checkpipinstallation.py
python3 main.py

checkpipinstallation.py只有一行：

import unittest2

运行bash脚本的输出：

Requirement already satisfied: unittest2 in /home/ubuntu/virtualenvs/venv-system/lib/python2.7/site-packages
Requirement already satisfied: argparse in /usr/lib/python2.7 (from unittest2)
Requirement already satisfied: six>=1.4 in /home/ubuntu/virtualenvs/venv-system/lib/python2.7/site-packages (from unittest2)
Requirement already satisfied: traceback2 in /home/ubuntu/virtualenvs/venv-system/lib/python2.7/site-packages (from unittest2)
Requirement already satisfied: linecache2 in /home/ubuntu/virtualenvs/venv-system/lib/python2.7/site-packages (from traceback2->unittest2)
Traceback (most recent call last):
  File "checkpipinstallation.py", line 1, in <module>
    import unittest2
ImportError: No module named 'unittest2'
Traceback (most recent call last):
  File "main.py", line 2, in <module>
    import runner
  File "/home/ubuntu/ui-tests-functional/new_tests/runner.py", line 1, in <module>
    import unittest2
ImportError: No module named 'unittest2'

bash new_tests/circleSetUp.sh returned exit code 1

Answer 1

您没有显示Python版本或.circle.yml，所以我只能猜测：

pip install unittest2

使用Python2.7安装unittest2，而接下来的命令使用python3。试一试

pip3 install unittest2
pip3 install -r requirements.txt

要调试打印版本的运行情况，请执行以下操作：

python --version
python3 --version
pip --version
pip3 --version