I am using CentOS-6 with Python 3.8, PostgreSQL 12 and PyGreSQL 5.2.2. This is the error I get trying to insert data into my database.
>>> db.insert('settings', None, **data)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.8/site-packages/pg.py", line 2322, in insert
adapt = params.add
File "/usr/local/lib/python3.8/site-packages/pg.py", line 1667, in __getattr__
if self.db:
AttributeError: 'pg.Connection' object has no attribute 'escape_identifier'
Can anyone point me towards what is wrong?
The method escape_identifier on the connection corresponds to the function PQescapeIdentifier in libpq. It exists since PostgreSQL 9 which is required by PyGreSQL 5.2. PyGreSQL does not compile support for these functions if it is installed with the no-escaping-funcs option or if it thinks PostgreSQL is older than version 9.
Since you say that you have PostgreSQL 12 installed, a possible explanation could be that you still have the client library (libpq) of an old PostgreSQL version installed as well, and the pg_config tool reports that old version. You should check this with pg_config --version. The pg_config tool is in libpq-devel, so make sure you have libpq and libpq-devel installed for PostgreSQL 12.
You can also try to explicitly enable the escaping functions by installing PyGreSQL with python setup.py build_ext --escaping-funcs install, but you will still need the latest libpq, and there will be other functions disabled as well when PyGreSQL thinks that libpq is too old. So the proper solution is to make sure libpq is up to date and pg_config --version reports the corresponding PostgreSQL version.
Related
I encountered a problem with topic is ImportError: No module named serial by I use it in Linux ubuntu 20.04, and my python version is 3.8.10.
Traceback (most recent call last):
File "/home/prawee/catkin_ws/src/ros_myo_2/scripts/myo-rawNode.py", line 9, in <module>
import serial
ImportError: No module named serial
And I have pyserial version 3.5 installed. I have tried repeating the serial install which says this.
Requirement already satisfied: pyserial in /usr/local/lib/python3.8/dist-packages (3.5)
WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
WARNING: There was an error checking the latest version of pip.
I wonder if this warning is related to problem?
This problem just happened for the first time. Before this I was able to use it normally. I have tried many ways but still don't understand how to fix it, please help me.
I am stuck in a problem import serial which I hope to be able to fix and use it again the way it used to be.
I want to install apex on my computer with Windows 10 and cuda 9.0. I know apex is not recommended to be installed on Windows, but I still very much want to try it. I used These two commands provided on apex official website:
pip install -v --no-cache-dir --global-option="--cpp_ext" --global-option="--cuda_ext"
and
pip install -v --no-cache-dir
but under both conditions got the error:
ERROR: You must give at least one requirement to install (see "pip help install")
The whole message is:
>pip install -v --no-cache-dir --global-option="--cpp_ext" --global-option="--cuda_ext"
C:\Users\Huiqi Xue\AppData\Local\conda\conda\envs\deeplearning\lib\site-packages\pip\_internal\commands\install.py:211: UserWarning: Disabling all use of wheels due to the use of --build-options / --global-options / --install-options.
cmdoptions.check_install_build_global(options)
Config variable 'Py_DEBUG' is unset, Python ABI tag may be incorrect
Config variable 'WITH_PYMALLOC' is unset, Python ABI tag may be incorrect
Created temporary directory: C:\Users\HUIQIX~1\AppData\Local\Temp\pip-ephem-wheel-cache-9dmaw_wt
Created temporary directory: C:\Users\HUIQIX~1\AppData\Local\Temp\pip-req-tracker-rf4_u0bh
Created requirements tracker 'C:\\Users\\HUIQIX~1\\AppData\\Local\\Temp\\pip-req-tracker-rf4_u0bh'
Created temporary directory: C:\Users\HUIQIX~1\AppData\Local\Temp\pip-install-bflvtp4e
Cleaning up...
Removed build tracker 'C:\\Users\\HUIQIX~1\\AppData\\Local\\Temp\\pip-req-tracker-rf4_u0bh'
ERROR: You must give at least one requirement to install (see "pip help install")
Exception information:
Traceback (most recent call last):
File "C:\Users\Huiqi Xue\AppData\Local\conda\conda\envs\deeplearning\lib\site-packages\pip\_internal\cli\base_command.py", line 143, in main
status = self.run(options, args)
File "C:\Users\Huiqi Xue\AppData\Local\conda\conda\envs\deeplearning\lib\site-packages\pip\_internal\commands\install.py", line 293, in run
self.name, wheel_cache
File "C:\Users\Huiqi Xue\AppData\Local\conda\conda\envs\deeplearning\lib\site-packages\pip\_internal\cli\base_command.py", line 252, in populate_requirement_set
'(see "pip help %(name)s")' % opts)
pip._internal.exceptions.CommandError: You must give at least one requirement to install (see "pip help install")
Config variable 'Py_DEBUG' is unset, Python ABI tag may be incorrect
Config variable 'WITH_PYMALLOC' is unset, Python ABI tag may be incorrect
1 location(s) to search for versions of pip:
You are probably getting the error because you missed the dot at the end of the command:
pip install -v --no-cache-dir --global-option="--cpp_ext" --global-option="--cuda_ext" .
I have followed the tutorial for installing Geodjango on my Ubuntu 14.04. I am using Django 1.10 and Python 3.5, postgres-9.6 and postgis 2.3.
I have checked here and here, but found no solution.
In a newly installed ubuntu 14.04 Virtual Machine, it worked.
But in my installation, when I tried making migrations, I got:
OSError: /usr/lib/libgdal.so.1: undefined symbol: sqlite3_column_table_name
Investigating a bit further, I tried simply:
from django.contrib.gis import gdal
And got:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/pv/anaconda3/envs/dj110py35/lib/python3.5/site-packages/django/contrib/gis/gdal/__init__.py", line 49, in <module>
from django.contrib.gis.gdal.driver import Driver # NOQA
File "/home/pv/anaconda3/envs/dj110py35/lib/python3.5/site-packages/django/contrib/gis/gdal/driver.py", line 5, in <module>
from django.contrib.gis.gdal.prototypes import ds as vcapi, raster as rcapi
File "/home/pv/anaconda3/envs/dj110py35/lib/python3.5/site-packages/django/contrib/gis/gdal/prototypes/ds.py", line 9, in <module>
from django.contrib.gis.gdal.libgdal import GDAL_VERSION, lgdal
File "/home/pv/anaconda3/envs/dj110py35/lib/python3.5/site-packages/django/contrib/gis/gdal/libgdal.py", line 48, in <module>
lgdal = CDLL(lib_path)
File "/home/pv/anaconda3/envs/dj110py35/lib/python3.5/ctypes/__init__.py", line 347, in __init__
self._handle = _dlopen(self._name, mode)
OSError: /usr/lib/libgdal.so.1: undefined symbol: sqlite3_column_table_name
Is there any suggestions on how I could repair my setup?
UPDATE
It seems to be a problema with my conda environment. When I started using a pip virtualenv, the problem did not arise anymore. I am not answering the question, because I could not find the solution, only a workaround. But rebuilding the environment with pip virtualenv works.
In conda environment: conda install -c conda-forge gdal=2.2.1
In django settings.py:
GDAL_LIBRARY_PATH = '<HOME>/anaconda3/envs/<env_name>/lib/libgdal.so'
I was having this issue as well and the specifying
GDAL_LIBRARY_PATH = <HOME>/anaconda3/envs/<env_name>/lib/libgdal.so
(in project.settings or os.environ.setdefault) led to
libicui18n.so.56: cannot open shared object file: No such file or directory.
The fix that worked for me was to upgrade icu:
conda install -c conda-forge icu=58
Upgrading icu lead to some changes in other package versions as well (qt downgraded from 5.6.2-4 to 5.6.2-3, the rest upgraded).
I simply run under my conda environment:
conda install gdal
Guy de Carufel's solution did not work for me, though he pointed to a correct direction, thanks
Have you built SQLite from source? Then, you forgot to enable Column metadata. Recompile SQLite with
CFLAGS="-DSQLITE_ENABLE_COLUMN_METADATA=1" ./configure
make
sudo make install
Have fun using the cutting edge SQLite.
Reference - https://www.sqlite.org/compile.html#enable_column_metadata
I have tried pip install psycopg2 and following errors i got:
Error:
(ScrapeProj) C:\Users\e2sn7cy\Documents\GitHub\scraper>pip install psycopg2==2.5.4
Collecting psycopg2==2.5.4
Using cached psycopg2-2.5.4.tar.gz
Complete output from command python setup.py egg_info:
running egg_info
creating pip-egg-info\psycopg2.egg-info
writing pip-egg-info\psycopg2.egg-info\PKG-INFO
writing top-level names to pip-egg-info\psycopg2.egg-info\top_level.txt
writing dependency_links to pip-egg-info\psycopg2.egg-info\dependency_links.txt
writing manifest file 'pip-egg-info\psycopg2.egg-info\SOURCES.txt'
warning: manifest_maker: standard file '-c' not found
Error: pg_config executable not found.
Please add the directory containing pg_config to the PATH
or specify the full executable path with the option:
python setup.py build_ext --pg-config /path/to/pg_config build ...
or with the pg_config option in 'setup.cfg'.
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in c:\users\e2sn7cy\appdata\local\temp\pi
p-build-joij3x\psycopg2
Then I tried using easy_install by downloading the .exe file from Stickpole and I got following errors :
(ScrapeProj) C:\Users\e2sn7cy\Envs\ScrapeProj\Scripts>easy_install psycopg2-2.6.1.win-amd64-py2.7-pg9
.4.4-release.exe
Processing psycopg2-2.6.1.win-amd64-py2.7-pg9.4.4-release.exe
psycopg2.tests.test_module: module references __file__
psycopg2.tests.test_types_basic: module references __file__
creating 'c:\users\e2sn7cy\appdata\local\temp\easy_install-sa7asq\psycopg2-2.6.1-py2.7-win32.egg' and
adding 'c:\users\e2sn7cy\appdata\local\temp\easy_install-sa7asq\psycopg2-2.6.1-py2.7-win32.egg.tmp'
to it
creating c:\users\e2sn7cy\envs\scrapeproj\lib\site-packages\psycopg2-2.6.1-py2.7-win32.egg
Extracting psycopg2-2.6.1-py2.7-win32.egg to c:\users\e2sn7cy\envs\scrapeproj\lib\site-packages
Adding psycopg2 2.6.1 to easy-install.pth file
Installed c:\users\e2sn7cy\envs\scrapeproj\lib\site-packages\psycopg2-2.6.1-py2.7-win32.egg
Processing dependencies for psycopg2==2.6.1
Finished processing dependencies for psycopg2==2.6.1
But when I again tried to install through pip I am getting a new message that its already there :
(ScrapeProj) C:\Users\e2sn7cy\Envs\ScrapeProj>pip install psycopg2
Requirement already satisfied (use --upgrade to upgrade): psycopg2 in c:\users\e2sn7cy\envs\scrapepro
j\lib\site-packages\psycopg2-2.6.1-py2.7-win32.egg
Then I thought ok I should try to import and then I got this error:
(ScrapeProj) C:\Users\e2sn7cy\Envs\ScrapeProj>python
Python 2.7.10 (default, May 23 2015, 09:40:32) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import psycopg2
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Users\e2sn7cy\Envs\ScrapeProj\lib\site-packages\psycopg2-2.6.1-py2.7-win32.egg\psycopg2\__
init__.py", line 50, in <module>
from psycopg2._psycopg import BINARY, NUMBER, STRING, DATETIME, ROWID
ImportError: DLL load failed: %1 is not a valid Win32 application.
Now I am not able to understand what to do. Thanks
Edit 1:
I have also added my PostgreSQL path to system path variables
path:C:\Program Files\PostgreSQL\9.4
path:C:\Program Files\PostgreSQL\9.4\bin
The correct answer was given by Craig Ringer, I am just adding this because I came to know that we should first check which version of 64 bit or 32bit Python installed on our system. If you have 32 bit version of Python and if you will try to install 64bit, then you will get the above error on importing.
For checking the version:
import platform
platform.architecture()
and you will get an output like this:
('32bit','WindowsPE')
Download the pre-packaged binary release of psycopg2 for Windows rather than compiling it yourself. It's a pain to compile on Windows. This is explained in the install documentation for psycopg2.
You might need to remove your half-installed attempts.
Choose the appropriate version from this page:
http://www.stickpeople.com/projects/python/win-psycopg/
Right click and select copy link address
Back at home, use easy_install <<Paste URL Here>>
Freeze your new requirements: pip freeze > requirements.txt
Now that psycopg is in PyPI (as of March 2017 it appears), just fire up a command prompt with administrator privileges and install like so:
python -m pip install -U pip
python -m pip install psycopg2
If you don't have pip installed, follow the instructions here to do that first:
https://stackoverflow.com/a/12476379/2540707
pip install psycopg2-binary
This worked for me
Step 1: Compilers Installation and configuration
https://wiki.python.org/moin/WindowsCompilers
Before do anything, install or upgrade the Setuptools Python package. It contain compatibility improvements and add automatic use of compilers:
pip install --upgrade setuptools
Step 2: Download and install PostgreSQL
Before you continue to install python packages inside you virtualenvs download postgres itself. It contains files that are needed when compiling the psycopg2 python package. Just use the PostgreSQL installer(version 10 for example).
Important: add the postgres C:\Program Files\PostgreSQL\10\bin folder to your path. It contains the .dll needed for psycopg2.
Step 3: Install psycopg2
pip install psycopg2
Tested on Windows 7 + python 3.7
The best/easiest way of installing packages (including this problematic psycopg2 ) for python on windows platform is to:
1) install anaconda and ...
2) use Anaconda Navigator GUI to install/update packages.
By this one avoids many inconsistencies and conflicts that occurs among different packages versions and installations.
Since we upgrade our postgresql 8.3 to postgresql 9, \d command doesnt works anymore with psql-client 8.3 :
ERROR: column "reltriggers" does not exist
LINE 1: SELECT relhasindex, relkind, relchecks, reltriggers, relhasr"
In postgres trees psql-client must download as one package with postgresql9. Where i can download only psql-client binary package a.k.a psql for Postgresql 9.0 ?
Update:
This case occur when older psql-client trying to access a newer version of postgres (psql-client: 8.3 trying to access postgres-server: 9.0).
It appears that Ubuntu does not ship PostgreSQL 9.0 yet. So this could be a bit tricky. Either you build PostgreSQL 9.0 from source and only install the client parts that you want, or you download the Debian source package for postgresql-9.0 and build that on Ubuntu and then only install the postgresql-client-9.0 package.
Or you install the postgresql-client-8.4 package. This isn't quite the solution, but it's closer to it, and I verified that it will get you past the error you showed.