pip3 install psycopg2安装失败，解决办法

https://www.cnblogs.com/daofaziran/p/12604879.html

错误提示：

  ERROR: Command errored out with exit status 1:
   command: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-xr58_vty/psycopg2/setup.py'"'"'; __file__='"'"'/tmp/pip-install-xr58_vty/psycopg2/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /tmp/pip-wheel-45gvr08r
       cwd: /tmp/pip-install-xr58_vty/psycopg2/
  Complete output (40 lines):
  running bdist_wheel
  running build
  running build_py
  creating build
  creating build/lib.linux-x86_64-3.8
  creating build/lib.linux-x86_64-3.8/psycopg2
  copying lib/pool.py -> build/lib.linux-x86_64-3.8/psycopg2
  copying lib/errorcodes.py -> build/lib.linux-x86_64-3.8/psycopg2
  copying lib/extensions.py -> build/lib.linux-x86_64-3.8/psycopg2
  copying lib/_json.py -> build/lib.linux-x86_64-3.8/psycopg2
  copying lib/tz.py -> build/lib.linux-x86_64-3.8/psycopg2
  copying lib/_lru_cache.py -> build/lib.linux-x86_64-3.8/psycopg2
  copying lib/sql.py -> build/lib.linux-x86_64-3.8/psycopg2
  copying lib/compat.py -> build/lib.linux-x86_64-3.8/psycopg2
  copying lib/_range.py -> build/lib.linux-x86_64-3.8/psycopg2
  copying lib/errors.py -> build/lib.linux-x86_64-3.8/psycopg2
  copying lib/extras.py -> build/lib.linux-x86_64-3.8/psycopg2
  copying lib/__init__.py -> build/lib.linux-x86_64-3.8/psycopg2
  copying lib/_ipaddress.py -> build/lib.linux-x86_64-3.8/psycopg2
  running build_ext
  building 'psycopg2._psycopg' extension
  creating build/temp.linux-x86_64-3.8
  creating build/temp.linux-x86_64-3.8/psycopg
  x86_64-linux-gnu-gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -g -fwrapv -O2 -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DPSYCOPG_VERSION=2.8.5 (dt dec pq3 ext lo64) -DPG_VERSION_NUM=120004 -DHAVE_LO64=1 -I/usr/include/python3.8 -I. -I/usr/include/postgresql -I/usr/include/postgresql/12/server -c psycopg/psycopgmodule.c -o build/temp.linux-x86_64-3.8/psycopg/psycopgmodule.o -Wdeclaration-after-statement
  In file included from psycopg/psycopgmodule.c:28:
  ./psycopg/psycopg.h:36:10: fatal error: libpq-fe.h: No such file or directory
     36 | #include <libpq-fe.h>
        |          ^~~~~~~~~~~~
  compilation terminated.

  It appears you are missing some prerequisite to build the package from source.

  You may install a binary package by installing 'psycopg2-binary' from PyPI.
  If you want to install psycopg2 from source, please install the packages
  required for the build and try again.

  For further information please check the 'doc/src/install.rst' file (also at
  <https://www.psycopg.org/docs/install.html>).

  error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
  ----------------------------------------
  ERROR: Failed building wheel for psycopg2
  Running setup.py clean for psycopg2
Failed to build psycopg2
Installing collected packages: psycopg2
    Running setup.py install for psycopg2 ... error
    ERROR: Command errored out with exit status 1:
     command: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-xr58_vty/psycopg2/setup.py'"'"'; __file__='"'"'/tmp/pip-install-xr58_vty/psycopg2/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-qwxwtt18/install-record.txt --single-version-externally-managed --compile --install-headers /usr/local/include/python3.8/psycopg2
         cwd: /tmp/pip-install-xr58_vty/psycopg2/
    Complete output (40 lines):
    running install
    running build
    running build_py
    creating build
    creating build/lib.linux-x86_64-3.8
    creating build/lib.linux-x86_64-3.8/psycopg2
    copying lib/pool.py -> build/lib.linux-x86_64-3.8/psycopg2
    copying lib/errorcodes.py -> build/lib.linux-x86_64-3.8/psycopg2
    copying lib/extensions.py -> build/lib.linux-x86_64-3.8/psycopg2
    copying lib/_json.py -> build/lib.linux-x86_64-3.8/psycopg2
    copying lib/tz.py -> build/lib.linux-x86_64-3.8/psycopg2
    copying lib/_lru_cache.py -> build/lib.linux-x86_64-3.8/psycopg2
    copying lib/sql.py -> build/lib.linux-x86_64-3.8/psycopg2
    copying lib/compat.py -> build/lib.linux-x86_64-3.8/psycopg2
    copying lib/_range.py -> build/lib.linux-x86_64-3.8/psycopg2
    copying lib/errors.py -> build/lib.linux-x86_64-3.8/psycopg2
    copying lib/extras.py -> build/lib.linux-x86_64-3.8/psycopg2
    copying lib/__init__.py -> build/lib.linux-x86_64-3.8/psycopg2
    copying lib/_ipaddress.py -> build/lib.linux-x86_64-3.8/psycopg2
    running build_ext
    building 'psycopg2._psycopg' extension
    creating build/temp.linux-x86_64-3.8
    creating build/temp.linux-x86_64-3.8/psycopg
    x86_64-linux-gnu-gcc -pthread -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O2 -Wall -g -fstack-protector-strong -Wformat -Werror=format-security -g -fwrapv -O2 -g -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -fPIC -DPSYCOPG_VERSION=2.8.5 (dt dec pq3 ext lo64) -DPG_VERSION_NUM=120004 -DHAVE_LO64=1 -I/usr/include/python3.8 -I. -I/usr/include/postgresql -I/usr/include/postgresql/12/server -c psycopg/psycopgmodule.c -o build/temp.linux-x86_64-3.8/psycopg/psycopgmodule.o -Wdeclaration-after-statement
    In file included from psycopg/psycopgmodule.c:28:
    ./psycopg/psycopg.h:36:10: fatal error: libpq-fe.h: No such file or directory
       36 | #include <libpq-fe.h>
          |          ^~~~~~~~~~~~
    compilation terminated.

    It appears you are missing some prerequisite to build the package from source.

    You may install a binary package by installing 'psycopg2-binary' from PyPI.
    If you want to install psycopg2 from source, please install the packages
    required for the build and try again.

    For further information please check the 'doc/src/install.rst' file (also at
    <https://www.psycopg.org/docs/install.html>).

    error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
    ----------------------------------------
ERROR: Command errored out with exit status 1: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-xr58_vty/psycopg2/setup.py'"'"'; __file__='"'"'/tmp/pip-install-xr58_vty/psycopg2/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-qwxwtt18/install-record.txt --single-version-externally-managed --compile --install-headers /usr/local/include/python3.8/psycopg2 Check the logs for full command output.

解决办法：

sudo apt-get install python-psycopg2
sudo apt-get install libpq-dev

然后：

pip3 install psycopg2