Error when verify Ledger Nano S

sudo easy_install pip
[sudo] password for lulu2:
Searching for pip
Best match: pip 9.0.1
Processing pip-9.0.1-py2.7.egg
pip 9.0.1 is already the active version in easy-install.pth
Installing pip script to /usr/local/bin
Installing pip2.7 script to /usr/local/bin
Installing pip2 script to /usr/local/bin

Using /usr/local/lib/python2.7/dist-packages/pip-9.0.1-py2.7.egg
Processing dependencies for pip
Finished processing dependencies for pip
lulu2@linux:~$ sudo pip install virtualenv
The directory '/home/lulu2/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/lulu2/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Requirement already satisfied: virtualenv in /usr/local/lib/python2.7/dist-packageslulu2@linux:~$ virtualenv ledger
New python executable in /home/lulu2/ledger/bin/python
Installing setuptools, pip, wheel...done.
lulu2@linux:~$ source ledger/bin/activate
(ledger) lulu2@linux:~$ pip install ledgerblue
Collecting ledgerblue
  Using cached ledgerblue-0.1.16.tar.gz
Collecting hidapi>=0.7.99 (from ledgerblue)
  Using cached hidapi-0.7.99.post21.tar.gz
Collecting protobuf>=2.6.1 (from ledgerblue)
  Using cached protobuf-3.5.1-cp27-cp27mu-manylinux1_x86_64.whl
Collecting pycrypto>=2.6.1 (from ledgerblue)
  Using cached pycrypto-2.6.1.tar.gz
Collecting future (from ledgerblue)
  Using cached future-0.16.0.tar.gz
Collecting ecpy>=0.8.1 (from ledgerblue)
  Using cached ECPy-0.8.3.tar.gz
ECPy requires Python '>=3' but the running Python is 2.7.14
(ledger) lulu2@linux:~$ pip3 install ledgerblue
Collecting ledgerblue
  Using cached ledgerblue-0.1.16.tar.gz
Collecting hidapi>=0.7.99 (from ledgerblue)
  Using cached hidapi-0.7.99.post21.tar.gz
Collecting protobuf>=2.6.1 (from ledgerblue)  Using cached protobuf-3.5.1-cp27-cp27mu-manylinux1_x86_64.whl
Collecting pycrypto>=2.6.1 (from ledgerblue)
  Using cached pycrypto-2.6.1.tar.gz
Collecting future (from ledgerblue)
  Using cached future-0.16.0.tar.gz
Collecting ecpy>=0.8.1 (from ledgerblue)
  Using cached ECPy-0.8.3.tar.gz
ECPy requires Python '>=3' but the running Python is 2.7.14
(ledger) lulu2@linux:~$ python -m ledgerblue.checkGenuine --targetId 0x31100002
/home/lulu2/ledger/bin/python: No module named ledgerblue
(ledger) lulu2@linux:~$