[下载、解压python3.7]
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| wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tar.xz tar -xvf Python-3.7.0.tar.xz
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[安装编译]
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| cd Python-3.7.0/ ./configure --prefix=/usr/local/python3.7 make && make install
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[安装报错]
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| ModuleNotFoundError: No module named '_ctypes' make: *** [install] Error 1
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解决方法:
安装libffi-devel
yum install libffi-devel
重新编译安装
make && make install
[备份旧版本的python]
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| ll /usr/bin/python* lrwxrwxrwx. 1 root root 7 Apr 10 19:35 /usr/bin/python -> python2 lrwxrwxrwx. 1 root root 9 Apr 10 19:35 /usr/bin/python2 -> python2.7 -rwxr-xr-x. 1 root root 7136 Aug 4 2017 /usr/bin/python2.7 ------------------------- 一般自带系统已经做好了python2.7的备份,直接替换掉python即可
如果没有备份,使用一些命令备份: mv /usr/bin/python /usr/bin/python_old
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[新版本python软连接到python]
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| rm -rf /usr/bin/python ln -s /usr/local/python3.7/bin/python3.7 /usr/bin/python python -V 2.7版本没有pip,升级到python3.7后,自带有pip,做一个pip的软连接即可 ln -s /usr/local/python3.7/bin/pip3 /usr/bin/pip
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[升级完python之后,yum命令失效,需修改配置文件]
使用yum命令报以下错误:
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| yum clean all File "/usr/bin/yum", line 30 except KeyboardInterrupt, e: ^ SyntaxError: invalid syntax
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解决 yum 不可用:
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| 修改/usr/bin/yum配置文件
重新测试yum是否正常: yum clean all
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[升级完python之后,yum使用过程中,额外问题:]
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| yum install tree -y ---------------------------------- 报错: File "/usr/libexec/urlgrabber-ext-down", line 28 except OSError, e: ---------------------------------
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解决方法:
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| 修改/usr/libexec/urlgrabber-ext-down配置文件
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