无法在 centos 上执行 python.3.5.1

Question

我在 CentOS 上安装了 python3.5.1

在安装结束时，我看到了

/bin/install -c -m 644 ./Include/weakrefobject.h /usr/local/include/python3.5m
/bin/install -c -m 644 pyconfig.h /usr/local/include/python3.5m/pyconfig.h
/bin/install -c -m 644 Modules/config.c /usr/local/lib/python3.5/config-3.5m/config.c
/bin/install -c -m 644 Programs/python.o /usr/local/lib/python3.5/config-3.5m/python.o
/bin/install -c -m 644 ./Modules/config.c.in /usr/local/lib/python3.5/config-3.5m/config.c.in
/bin/install -c -m 644 Makefile /usr/local/lib/python3.5/config-3.5m/Makefile
/bin/install -c -m 644 Modules/Setup /usr/local/lib/python3.5/config-3.5m/Setup
/bin/install -c -m 644 Modules/Setup.local /usr/local/lib/python3.5/config-3.5m/Setup.local
/bin/install -c -m 644 Modules/Setup.config /usr/local/lib/python3.5/config-3.5m/Setup.config
/bin/install -c -m 644 Misc/python.pc /usr/local/lib/pkgconfig/python-3.5.pc
/bin/install -c ./Modules/makesetup /usr/local/lib/python3.5/config-3.5m/makesetup
/bin/install -c ./install-sh /usr/local/lib/python3.5/config-3.5m/install-sh
/bin/install -c python-config.py /usr/local/lib/python3.5/config-3.5m/python-config.py
/bin/install -c python-config /usr/local/bin/python3.5m-config
./python -E ./setup.py install \
        --prefix=/usr/local \
        --install-scripts=/usr/local/bin \
        --install-platlib=/usr/local/lib/python3.5/lib-dynload \
        --root=/
running install
running build
running build_ext
INFO: Can't locate Tcl/Tk libs and/or headers
**Python build finished successfully!**
The necessary bits to build these optional modules were not found:
_bz2                  _curses               _curses_panel      
_dbm                  _gdbm                 _lzma              
_sqlite3              _ssl                  _tkinter           
readline              zlib                                     
To find the necessary bits, look in setup.py in detect_modules() for the module's name.
running build_scripts

copying and adjusting /home/kumar/Python-3.5.1/Tools/scripts/pydoc3 -> build/scripts-3.5
copying and adjusting /home/kumar/Python-3.5.1/Tools/scripts/idle3 -> build/scripts-3.5
copying and adjusting /home/kumar/Python-3.5.1/Tools/scripts/2to3 -> build/scripts-3.5
copying and adjusting /home/kumar/Python-3.5.1/Tools/scripts/pyvenv -> build/scripts-3.5
changing mode of build/scripts-3.5/pydoc3 from 644 to 755
changing mode of build/scripts-3.5/idle3 from 644 to 755
changing mode of build/scripts-3.5/2to3 from 644 to 755
changing mode of build/scripts-3.5/pyvenv from 644 to 755
renaming build/scripts-3.5/pydoc3 to build/scripts-3.5/pydoc3.5
renaming build/scripts-3.5/idle3 to build/scripts-3.5/idle3.5
renaming build/scripts-3.5/2to3 to build/scripts-3.5/2to3-3.5
renaming build/scripts-3.5/pyvenv to build/scripts-3.5/pyvenv-3.5
running install_lib
copying build/lib.linux-x86_64-3.5/_sysconfigdata.py -> /usr/local/lib/python3.5/lib-dynload
creating /usr/local/lib/python3.5/lib-dynload/__pycache__
copying build/lib.linux-x86_64-3.5/__pycache__/_sysconfigdata.cpython-35.pyc -> /usr/local/lib/python3.5/lib-dynloa
d/__pycache__
copying build/lib.linux-x86_64-3.5/__pycache__/_sysconfigdata.cpython-35.opt-1.pyc -> /usr/local/lib/python3.5/lib-
dynload/__pycache__
copying build/lib.linux-x86_64-3.5/__pycache__/_sysconfigdata.cpython-35.opt-2.pyc -> /usr/local/lib/python3.5/lib-
dynload/__pycache__
changing mode of /usr/local/lib/python3.5/lib-dynload/_sysconfigdata.py to 644

还有几行说改变模式，然后到最后

changing mode of /usr/local/lib/python3.5/lib-dynload/_codecs_iso2022.cpython-35m-x86_64-linux-gnu.so to 755
changing mode of /usr/local/lib/python3.5/lib-dynload/_decimal.cpython-35m-x86_64-linux-gnu.so to 755
changing mode of /usr/local/lib/python3.5/lib-dynload/_multiprocessing.cpython-35m-x86_64-linux-gnu.so to 755
changing mode of /usr/local/lib/python3.5/lib-dynload/ossaudiodev.cpython-35m-x86_64-linux-gnu.so to 755
changing mode of /usr/local/lib/python3.5/lib-dynload/xxlimited.cpython-35m-x86_64-linux-gnu.so to 755
changing mode of /usr/local/lib/python3.5/lib-dynload/_ctypes.cpython-35m-x86_64-linux-gnu.so to 755
changing mode of /usr/local/lib/python3.5/lib-dynload/ to 755
changing mode of /usr/local/lib/python3.5/lib-dynload/__pycache__ to 755
running install_scripts
copying build/scripts-3.5/pydoc3.5 -> /usr/local/bin
copying build/scripts-3.5/idle3.5 -> /usr/local/bin
copying build/scripts-3.5/2to3-3.5 -> /usr/local/bin
copying build/scripts-3.5/pyvenv-3.5 -> /usr/local/bin
changing mode of /usr/local/bin/pydoc3.5 to 755
changing mode of /usr/local/bin/idle3.5 to 755
changing mode of /usr/local/bin/2to3-3.5 to 755
changing mode of /usr/local/bin/pyvenv-3.5 to 755
rm /usr/local/lib/python3.5/lib-dynload/_sysconfigdata.py
rm -r /usr/local/lib/python3.5/lib-dynload/__pycache__
/bin/install -c -m 644 ./Misc/python.man \
        /usr/local/share/man/man1/python3.5.1
if test "xupgrade" != "xno"  ; then \
        case upgrade in \
                upgrade) ensurepip="--altinstall --upgrade" ;; \
                install|*) ensurepip="--altinstall" ;; \
        esac; \
         ./python -E -m ensurepip \
                $ensurepip --root=/ ; \
fi
Ignoring ensurepip failure: pip 7.1.2 requires SSL/TLS

据我了解，python 安装成功

但是当我说 #python3 或 #python3.5 或 #python3.5.1（从根目录）时，它只是说

-bash: python3.5: command not found

我没有修改安装路径或安装在/usr/local上的任何东西...请参阅附件。

我按照https://www.digitalocean.com/community/tutorials/how-to-set-up-python-2-7-6-and-3-3-3-on-centos-6-4的说明进行操作

并且已经运行了命令

$make altinstall

我应该改为跑步吗？

$make && make altinstall   

***更新*** 我按照@intboolstring 的建议尝试了#make install 而不是#make altinstall，这是输出，在其中一个屏幕截图中你会看到“Python 构建成功完成”，但在此之后我没有运气运行 python3

Answer 1

嗯，这是因为python3.5 命令不存在。

python

将运行 Python 2，带有

python3

运行 Python 3 shell。

当你启动 python shell 时，它会说：

$ python3
Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 23 2015, 02:52:03) 

它会显示您的版本号。