当我尝试oursql在虚拟环境下安装时，pip install oursql出现以下错误：
Collecting oursql
Using cached oursql-0.9.3.1.tar.bz2
Building wheels for collected packages: oursql
Running setup.py bdist_wheel for oursql
Complete output from command /home/raghav/janpro/release_1/venv/bin/python2 -c "import setuptools;__file__='/tmp/pip-build-ndxBoY/oursql/setup.py';exec(compile(open(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" bdist_wheel -d /tmp/tmpe4k7ejpip-wheel-:
cython not found, using previously-cython'd .c file.
running bdist_wheel
running build
running build_ext
warning: no usable mysql_config and no _winreg module to try; hopefully you have usable CFLAGS/LDFLAGS set.
building 'oursql' extension
creating build
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/oursqlx
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c oursqlx/oursql.c -o build/temp.linux-x86_64-2.7/oursqlx/oursql.o
oursqlx/oursql.c:4:20: fatal error: Python.h: No such file or directory
compilation terminated.
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
----------------------------------------
Failed building wheel for oursql
Failed to build oursql
Installing collected packages: oursql
Running setup.py install for oursql
Complete output from command /home/raghav/janpro/release_1/venv/bin/python2 -c "import setuptools, tokenize;__file__='/tmp/pip-build-ndxBoY/oursql/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-awH5dT-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/raghav/janpro/release_1/venv/include/site/python2.7/oursql:
cython not found, using previously-cython'd .c file.
running install
running build
running build_ext
warning: no usable mysql_config and no _winreg module to try; hopefully you have usable CFLAGS/LDFLAGS set.
building 'oursql' extension
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c oursqlx/oursql.c -o build/temp.linux-x86_64-2.7/oursqlx/oursql.o
oursqlx/oursql.c:4:20: fatal error: Python.h: No such file or directory
compilation terminated.
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
----------------------------------------
Command "/home/raghav/janpro/release_1/venv/bin/python2 -c "import setuptools, tokenize;__file__='/tmp/pip-build-ndxBoY/oursql/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-awH5dT-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/raghav/janpro/release_1/venv/include/site/python2.7/oursql" failed with error code 1 in /tmp/pip-build-ndxBoY/oursql
然后我安装MySQL C++ connectors了，sudo apt-get install libmysqlcppconn-dev但仍然出现错误。
所以，我尝试sudo pip install oursql并得到以下输出：
The directory '/home/raghav/.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/raghav/.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.
Collecting oursql
Downloading oursql-0.9.3.1.tar.bz2 (119kB)
100% |████████████████████████████████| 122kB 986kB/s
Installing collected packages: oursql
Running setup.py install for oursql
Complete output from command /usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-GbfPiA/oursql/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-avSCME-record/install-record.txt --single-version-externally-managed --compile:
cython not found, using previously-cython'd .c file.
running install
running build
running build_ext
warning: no usable mysql_config and no _winreg module to try; hopefully you have usable CFLAGS/LDFLAGS set.
building 'oursql' extension
creating build
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/oursqlx
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fno-strict-aliasing -D_FORTIFY_SOURCE=2 -g -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/usr/include/python2.7 -c oursqlx/oursql.c -o build/temp.linux-x86_64-2.7/oursqlx/oursql.o
oursqlx/oursql.c:4:20: fatal error: Python.h: No such file or directory
compilation terminated.
error: command 'x86_64-linux-gnu-gcc' failed with exit status 1
----------------------------------------
Command "/usr/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip-build-GbfPiA/oursql/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-avSCME-record/install-record.txt --single-version-externally-managed --compile" failed with error code 1 in /tmp/pip-build-GbfPiA/oursql
出了什么问题？我无法找到。