pypy3 import psycopg2 error (undefined symbol: PyCoder_Encoder)





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I installed psycopg2 to pypy3(Python3.5.3) by the following code on Ubuntu16.04:



pypy3 -m pip install psycopg2


However, I got some errors:




Error:b'You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.n'



Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-epd368s6/psycopg2




And I found the solution in "You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application".



My computer has already installed Postgresql9.5, so I used these commands to install:



sudo apt-get install libpq-dev
pypy3 -m pip install psycopg2


No error was reported, but when I tried "import psycopg2", I got ImportError:



enter image description here



I found the same error in "pypy3 import psycopg2 error (PyCodec_Encoder)", but I did not found a solution.



Do someone know how to fix it?










share|improve this question































    0















    I installed psycopg2 to pypy3(Python3.5.3) by the following code on Ubuntu16.04:



    pypy3 -m pip install psycopg2


    However, I got some errors:




    Error:b'You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.n'



    Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-epd368s6/psycopg2




    And I found the solution in "You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application".



    My computer has already installed Postgresql9.5, so I used these commands to install:



    sudo apt-get install libpq-dev
    pypy3 -m pip install psycopg2


    No error was reported, but when I tried "import psycopg2", I got ImportError:



    enter image description here



    I found the same error in "pypy3 import psycopg2 error (PyCodec_Encoder)", but I did not found a solution.



    Do someone know how to fix it?










    share|improve this question



























      0












      0








      0








      I installed psycopg2 to pypy3(Python3.5.3) by the following code on Ubuntu16.04:



      pypy3 -m pip install psycopg2


      However, I got some errors:




      Error:b'You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.n'



      Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-epd368s6/psycopg2




      And I found the solution in "You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application".



      My computer has already installed Postgresql9.5, so I used these commands to install:



      sudo apt-get install libpq-dev
      pypy3 -m pip install psycopg2


      No error was reported, but when I tried "import psycopg2", I got ImportError:



      enter image description here



      I found the same error in "pypy3 import psycopg2 error (PyCodec_Encoder)", but I did not found a solution.



      Do someone know how to fix it?










      share|improve this question
















      I installed psycopg2 to pypy3(Python3.5.3) by the following code on Ubuntu16.04:



      pypy3 -m pip install psycopg2


      However, I got some errors:




      Error:b'You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.n'



      Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-epd368s6/psycopg2




      And I found the solution in "You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application".



      My computer has already installed Postgresql9.5, so I used these commands to install:



      sudo apt-get install libpq-dev
      pypy3 -m pip install psycopg2


      No error was reported, but when I tried "import psycopg2", I got ImportError:



      enter image description here



      I found the same error in "pypy3 import psycopg2 error (PyCodec_Encoder)", but I did not found a solution.



      Do someone know how to fix it?







      python-3.x psycopg2 pypy






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 18 '18 at 2:13







      Epulari

















      asked Nov 16 '18 at 12:58









      EpulariEpulari

      93




      93
























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          The PyPy issue you pointed to contains the answer "Someone will have to implement the missing function (and the other missing PyCodec_* functions. Currently we only implement very few in codec.py. The implementation is quite straight-forward based on the pattern in the functions implemented, the harder part is writing tests.



          There is the psycopg2cffi package, which should work on PyPy and will be faster. Perhaps give it a try and comment here if it serves your needs.






          share|improve this answer
























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            1 Answer
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            oldest

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            The PyPy issue you pointed to contains the answer "Someone will have to implement the missing function (and the other missing PyCodec_* functions. Currently we only implement very few in codec.py. The implementation is quite straight-forward based on the pattern in the functions implemented, the harder part is writing tests.



            There is the psycopg2cffi package, which should work on PyPy and will be faster. Perhaps give it a try and comment here if it serves your needs.






            share|improve this answer




























              0














              The PyPy issue you pointed to contains the answer "Someone will have to implement the missing function (and the other missing PyCodec_* functions. Currently we only implement very few in codec.py. The implementation is quite straight-forward based on the pattern in the functions implemented, the harder part is writing tests.



              There is the psycopg2cffi package, which should work on PyPy and will be faster. Perhaps give it a try and comment here if it serves your needs.






              share|improve this answer


























                0












                0








                0







                The PyPy issue you pointed to contains the answer "Someone will have to implement the missing function (and the other missing PyCodec_* functions. Currently we only implement very few in codec.py. The implementation is quite straight-forward based on the pattern in the functions implemented, the harder part is writing tests.



                There is the psycopg2cffi package, which should work on PyPy and will be faster. Perhaps give it a try and comment here if it serves your needs.






                share|improve this answer













                The PyPy issue you pointed to contains the answer "Someone will have to implement the missing function (and the other missing PyCodec_* functions. Currently we only implement very few in codec.py. The implementation is quite straight-forward based on the pattern in the functions implemented, the harder part is writing tests.



                There is the psycopg2cffi package, which should work on PyPy and will be faster. Perhaps give it a try and comment here if it serves your needs.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 18 '18 at 7:55









                mattipmattip

                51137




                51137
































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