Install Python3实践记录

2019年了，在使用python2的时候，偶尔会发现python2将被deprecated，将被弃用了。那么为了能够使用新的包，跟着大众的步伐，安装python3是个不可以少的环节了。下面记录下我的安装以及使用python3的一些记录。

服务器: centos 7 当前python版本: 2.7.5

下载安装包

go to webpage https://www.python.org/downloads/release/python-374/

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wget https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz 

简单安装

使用超级用户身份登录，比如 root，然后参考下面的方式安装python3

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tar zxvf Python-3.7.4
cd Python-3.7.4
./configure
make && make install

遇到的问题一

Traceback (most recent call last):
File “/root/Python-3.7.4/Lib/runpy.py”, line 193, in _run_module_as_main
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"__main__", mod_spec)
File “/root/Python-3.7.4/Lib/runpy.py”, line 85, in _run_code
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exec(code, run_globals)
File “/root/Python-3.7.4/Lib/ensurepip/main.py”, line 5, in
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sys.exit(ensurepip._main())
File “/root/Python-3.7.4/Lib/ensurepip/init.py”, line 204, in _main
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default_pip=args.default_pip,
File “/root/Python-3.7.4/Lib/ensurepip/init.py”, line 117, in _bootstrap
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return _run_pip(args + [p[0] for p in _PROJECTS], additional_paths)
File “/root/Python-3.7.4/Lib/ensurepip/init.py”, line 27, in _run_pip
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import pip._internal
File “/tmp/tmpo8g_7brw/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/init.py”, line 40, in
File “/tmp/tmpo8g_7brw/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/cli/autocompletion.py”, line 8, in
File “/tmp/tmpo8g_7brw/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/cli/main_parser.py”, line 12, in
File “/tmp/tmpo8g_7brw/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/commands/init.py”, line 6, in
File “/tmp/tmpo8g_7brw/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/commands/completion.py”, line 6, in
File “/tmp/tmpo8g_7brw/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/cli/base_command.py”, line 20, in
File “/tmp/tmpo8g_7brw/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/download.py”, line 37, in
File “/tmp/tmpo8g_7brw/pip-19.0.3-py2.py3-none-any.whl/pip/_internal/utils/glibc.py”, line 3, in
File “/root/Python-3.7.4/Lib/ctypes/init.py”, line 7, in
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from _ctypes import Union, Structure, Array
ModuleNotFoundError: No module named ‘_ctypes’
make: *** [install] 错误 1

解决方法

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yum update
yum install libffi-devel