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前段時間浩道分享了一篇關于pycharm專業版本安裝破解后，不少小伙伴后臺咨詢浩道，linux環境下如何安裝更高版本的python3，畢竟系統默認自帶的python2版本已經不符合當前發展潮流，本文浩道就centos7下安裝部署python3.10.9版本帶大家通過以下15個步驟完成,其它版本安裝都可以參照如下步驟進行。福利在文末喔~

步驟1、首先使用 python -V 命令查看一下是否安裝Python，如下所示：

[root@huanghao-1 ~]# python -V
Python 2.7.5

由上面命令可以知道，CentOS7默認安裝了python2.7.5 ，因為一些命令要用它，比如yum 它使用的是python2.7.5。

步驟2、然后使用命令 which python 查看一下Python可執行文件的位置，可見執行文件在/usr/bin/ 目錄下。如下所示：

[root@huanghao-1 ~]# which python
/usr/bin/python

步驟3、通過cd /usr/bin/命令切換到/usr/bin/目錄下執行ll python* 命令查看，如下所示：

[root@huanghao-1 bin]# cd /usr/bin/
[root@huanghao-1 bin]# ll python*
lrwxrwxrwx. 1 root root    7 Jul 28  2018 python -> python2
lrwxrwxrwx. 1 root root    9 Jul 28  2018 python2 -> python2.7
-rwxr-xr-x. 1 root root 7136 Nov 20  2015 python2.7

由上面可知，python 指向的是python2.7，今天我們安裝3.10版本，所以python要指向python3.10才行。

步驟4：通過cd /usr/bin/切換到/usr/bin/目錄下，執行mv python python.bak命令進行備份。若有過程中用到yum,可以暫時恢復回來！！！，執行ll python* 命令查看，如下所示：

[root@huanghao-1 bin]# cd /usr/bin/
[root@huanghao-1 bin]# mv python python.bak
[root@huanghao-1 bin]# ll python*          
lrwxrwxrwx. 1 root root    9 Jul 28  2018 python2 -> python2.7
-rwxr-xr-x. 1 root root 7136 Nov 20  2015 python2.7
lrwxrwxrwx. 1 root root    7 Jul 28  2018 python.bak -> python2

步驟5、通過yum命令先安裝相關包：

yum install -y zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make libffi-devel

[root@huanghao-1 bin]# yum install -y zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make libffi-devel
-bash: /usr/bin/yum: /usr/bin/python: bad interpreter: No such file or directory

執行以上命令后，可以報錯了，不要慌！！這是因為我們在步驟4中改變了其環境變量，在/usr/bin目錄下，通過命令mv python.bak python還原回來即可。再次執行安裝命令就正常了。但是安裝完后記得備份回去！！！

mv python python.bak

步驟6、下載python3.10.9的源碼，自己創建一個目錄保存源碼，我自己放在/home/目錄下。通過cd /home/命令切換到/home/目錄下，執行wget下載命令：

wget https://www.python.org/ftp/python/3.10.9/Python-3.10.9.tar.xz

如果自己系統沒有wget命令，則yum安裝一下。

yum install-y wget

自己想安裝什么python3版本，就到https://www.python.org/getit/這個網站找，只需將以上版本路徑替換即可。

（1）如我這里安裝python3.10.9，打開上面網址后如下圖所示：

（2）選擇對應python版本后，點擊“download”后，下拉找到file頁面，如下圖所示：

（3）此時復制鏈接地址后，即可通過wget + 鏈接地址進行python源碼下載，如下命令所示，這里對應步驟6的命令：

wget https://www.python.org/ftp/python/3.10.9/Python-3.10.9.tar.xz

步驟7、在/home/目錄下已經看到下載好的源碼，通過tar -xvJf Python-3.7.0a4.tar.xz命令進行解壓縮。如下所示：

[root@huanghao-1 home]# ll
total 19156
-rw-r--r-- 1 root root 19612112 Dec  7 03:01 Python-3.10.9.tar.xz
[root@huanghao-1 home]# tar -xvJf  Python-3.10.9.tar.xz

步驟8、/home/目錄下，通過命令cd Python-3.10.9切換進入源碼包目錄。

cd Python-3.10.9

步驟9、編譯安裝，依次執行以下命令進行：

./configureprefix=/usr/local/python3.10 --with-ssl
make&&makeinstall

等待安裝完畢后，通過命令cd/usr/local/切換到/usr/local/目錄下，通過ll命令查看，就會有python3.10目錄了,如下圖所示：

[root@huanghao-1 Python-3.10.9]# cd /usr/local/
[root@huanghao-1 local]# ll
total 0
drwxr-xr-x. 2 root root  6 Aug 12  2015 bin
drwxr-xr-x. 2 root root  6 Aug 12  2015 etc
drwxr-xr-x. 2 root root  6 Aug 12  2015 games
drwxr-xr-x. 2 root root  6 Aug 12  2015 include
drwxr-xr-x. 2 root root  6 Aug 12  2015 lib
drwxr-xr-x. 2 root root  6 Aug 12  2015 lib64
drwxr-xr-x. 2 root root  6 Aug 12  2015 libexec
drwxr-xr-x  6 root root 52 Mar 26 19:06 python3.10
drwxr-xr-x. 2 root root  6 Aug 12  2015 sbin
drwxr-xr-x. 5 root root 46 Jul 28  2018 share
drwxr-xr-x. 2 root root  6 Aug 12  2015 src
[root@huanghao-1 local]#

步驟10、將python3.10版本對應的執行文件添加軟鏈接到執行目錄下/usr/bin，通過以下命令完成：

ln-s/usr/local/python3.10/bin/python3.10/usr/bin/python

最終結果如下所示：

[root@huanghao-1 bin]# cd /usr/bin/
[root@huanghao-1 bin]# ll python*  
lrwxrwxrwx  1 root root   36 Mar 26 19:11 python -> /usr/local/python3.10/bin/python3.10
lrwxrwxrwx. 1 root root    9 Jul 28  2018 python2 -> python2.7
-rwxr-xr-x. 1 root root 7136 Nov 20  2015 python2.7
lrwxrwxrwx. 1 root root    7 Jul 28  2018 python.bak -> python2

步驟11、測試是否成功安裝，執行python -V命令，執行python2 -V，輸出如下所示：成功安裝python3.10.9版本。

[root@huanghao-1 bin]# python -V
Python 3.10.9
[root@huanghao-1 bin]# python2 -V
Python 2.7.5

步驟12、因為執行yum等命令需要python2版本，所以我們還要修改yum配置及其它相關配置:

(1)執行命令vi /usr/bin/yum進行修改，修改內容如下：

把#! /usr/bin/python修改為：

#! /usr/bin/python2

（2）執行命令vi /usr/libexec/urlgrabber-ext-down

把文件里面的#! /usr/bin/python 也要修改為：

#! /usr/bin/python2

（3）執行命令vi /usr/sbin/firewalld

文件里面的#!/usr/bin/python -Es也要修改為：

#!/usr/bin/python2 -Es

步驟13、建立pip3的軟鏈接，執行以下命令：

ln -s /usr/local/python3.10/bin/pip3 /usr/bin/pip3

步驟14、這樣python3版本就安裝完成，同時python2也存在：可以通過以下命令進行查看：

[root@huanghao-1 bin]# python -V
Python 3.10.9
[root@huanghao-1 bin]# python2 -V
Python 2.7.5

步驟15、此時發現安裝完成后，無法通過pip3命令安裝相關模塊，如：

[root@huanghao-1 ~]#pip3installFlask
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/flask/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/flask/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/flask/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/flask/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/flask/
Could not fetch URL https://pypi.org/simple/flask/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/flask/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping
ERROR: Could not find a version that satisfies the requirement Flask (from versions: none)
ERROR: No matching distribution found for Flask
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping
WARNING: There was an error checking the latest version of pip.
[root@node1 Python-3.10.9]# pip3 install --upgrade pip
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Requirement already satisfied: pip in /usr/local/python3.10/lib/python3.10/site-packages (22.3.1)
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pip/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pip/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pip/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pip/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pip/
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping
WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping
WARNING: There was an error checking the latest version of pip.

如上出現報錯，此時可以按照如下方法進行解決。

（1）在用戶家目錄下創建相關文件后進行如下編輯：

[root@huanghao-1 ~]# mkdir -p ~/.pip
[root@huanghao-1 ~]# vi ~/.pip/pip.conf

（2）在上一步編輯文件中，新增如下內容：

[global]
index-url = http://mirrors.aliyun.com/pypi/simple


[install]
trusted-host = mirrors.aliyun.com

（3）此時再次安裝相應模塊，如下可以成功了。

[root@huanghao-1 ~]# pip3 install Flask
Looking in indexes: http://mirrors.aliyun.com/pypi/simple
Collecting Flask
  Downloading http://mirrors.aliyun.com/pypi/packages/fa/1a/f191d32818e5cd985bdd3f47a6e4f525e2db1ce5e8150045ca0c31813686/Flask-2.3.2-py3-none-any.whl (96 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 96.9/96.9 kB 1.8 MB/s eta 000
Collecting Jinja2>=3.1.2
  Downloading http://mirrors.aliyun.com/pypi/packages/bc/c3/f068337a370801f372f2f8f6bad74a5c140f6fda3d9de154052708dd3c65/Jinja2-3.1.2-py3-none-any.whl (133 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 133.1/133.1 kB 1.4 MB/s eta 000
Collecting click>=8.1.3
  Downloading http://mirrors.aliyun.com/pypi/packages/1a/70/e63223f8116931d365993d4a6b7ef653a4d920b41d03de7c59499962821f/click-8.1.6-py3-none-any.whl (97 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 97.9/97.9 kB 1.4 MB/s eta 000
Collecting Werkzeug>=2.3.3
  Downloading http://mirrors.aliyun.com/pypi/packages/ba/d6/8040faecaba2feb84e1647af174b3243c9b90c163c7ea407820839931efe/Werkzeug-2.3.6-py3-none-any.whl (242 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 242.5/242.5 kB 1.5 MB/s eta 000
Collecting blinker>=1.6.2
  Downloading http://mirrors.aliyun.com/pypi/packages/0d/f1/5f39e771cd730d347539bb74c6d496737b9d5f0a53bc9fdbf3e170f1ee48/blinker-1.6.2-py3-none-any.whl (13 kB)
Collecting itsdangerous>=2.1.2
  Downloading http://mirrors.aliyun.com/pypi/packages/68/5f/447e04e828f47465eeab35b5d408b7ebaaaee207f48b7136c5a7267a30ae/itsdangerous-2.1.2-py3-none-any.whl (15 kB)
Collecting MarkupSafe>=2.0
  Downloading http://mirrors.aliyun.com/pypi/packages/12/b3/d9ed2c0971e1435b8a62354b18d3060b66c8cb1d368399ec0b9baa7c0ee5/MarkupSafe-2.1.3-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (25 kB)
Installing collected packages: MarkupSafe, itsdangerous, click, blinker, Werkzeug, Jinja2, Flask
Successfully installed Flask-2.3.2 Jinja2-3.1.2 MarkupSafe-2.1.3 Werkzeug-2.3.6 blinker-1.6.2 click-8.1.6 itsdangerous-2.1.2
WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv


[notice] A new release of pip available: 22.3.1 -> 23.2.1
[notice] To update, run: /usr/local/python3.10/bin/python3.10 -m pip install --upgrade pip

（4）根據提示，也可以升級pip版本到最新的版本。

pip3 install --upgrade pip

（5）下面可以通過創建一段腳本，驗證下載的模塊是否可以正常使用，創建名為hello_flask.py的文件，內容如下：

[root@huanghao-1 ~]# cat hello_flask.py 
from flask import Flask


app = Flask(__name__)


@app.route('/')
def hello():
        return 'Hello flask'


if __name__ == '__main__':
app.run(host='0.0.0.0',port=8888,debug=True)

（6）執行hello_flask.py腳本