Question

I have installed pyqrcode => PyQRCode on Ubuntu 12.04 x86_64.
by running make && sudo make install.

At then end of the successful make/make install, the last line is:

Installed
/usr/local/lib/python2.7/dist-packages/qrcode-0.2.1-py2.7-linux-x86_64.egg

But when I try to import qrcode I get this error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "qrcode/__init__.py", line 6, in <module>
    from qrcode import _qrcode
ImportError: cannot import name _qrcode

Answer 1

sudo pip install qrcode worked just fine for me.

My guess is that after compiling, you started Python up from the source directory, and so it looked in the local qrcode directory — i.e. pyqrcode-0.2.1/qrcode instead of in the usual Python path. Try running it from another directory. To be specific:

~/sys/pyqrcode-0.2.1$ python
Python 2.7.3 (default, Apr 20 2012, 22:44:07) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import qrcode
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "qrcode/__init__.py", line 6, in <module>
    from qrcode import _qrcode
ImportError: cannot import name _qrcode
>>> 
~/sys/pyqrcode-0.2.1$ cd ~
~$ python
Python 2.7.3 (default, Apr 20 2012, 22:44:07) 
[GCC 4.6.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import qrcode
>>> qrcode
<module 'qrcode' from '/usr/local/lib/python2.7/dist-packages/qrcode/__init__.pyc'>