centos自訂安裝pip3

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題記

在之前的文章centos雲端服務器安裝Python3記錄 記錄了怎麼自訂安裝 Python3 ，在後邊測試pip3的時候發現了個問題：

pip --version

terminal 列印：

pip 8.1.2 from /usr/lib/python2.7/site-packages (python 2.7)

如上：pip版本還是 Python2.7 版本

解決

由於對於系統和Python並不是特別熟悉，首先想到的是問下度娘。度娘給了幾種建議全部是下載pip再安裝。我沒有急於執行而是去看了下 官方文檔
其中有這樣的表述：

大概意思是：

1.看下系統內pip是否可用：

[[email protected] python3]# pip --versionpip 8.1.2 from /usr/lib/python2.7/site-packages (python 2.7)

2.查看pip是否存在於安裝包

[[email protected] python3]# python -m ensurepip --default-pipLooking in links: /tmp/tmpzzl1ppcaRequirement already satisfied: setuptools in ./lib/python3.7/site-packages (39.0.1)Requirement already satisfied: pip in ./lib/python3.7/site-packages (10.0.1)

3. 由步驟 2 可知，pip3已經存在於 Python3.7 的安裝檔案中，只是沒有對應的軟鏈

[[email protected] bin]# ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3[[email protected] bin]# pip3 --versionpip 10.0.1 from /usr/local/python3/lib/python3.7/site-packages/pip (python 3.7)

4.想起來自己mac上的pip還是用的pip3，於是也修改軟鏈。

Last login: Sat Sep 29 23:13:21 on ttys002liuyonghudeMacBook-Pro:~ liuyonghu$ pip3 --versionpip 9.0.1 from /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (python 3.6)liuyonghudeMacBook-Pro:~ liuyonghu$ which python3/usr/local/bin/python3liuyonghudeMacBook-Pro:~ liuyonghu$ which pip3/usr/local/bin/pip3liuyonghudeMacBook-Pro:~ liuyonghu$ ln -s /Library/Frameworks/Python.framework/Versions/3.6/bin/pip3 /usr/local/bin/pipliuyonghudeMacBook-Pro:~ liuyonghu$ pip --versionpip 9.0.1 from /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (python 3.6)

5. 其實中間尋找pip路徑的步驟比較費勁，也記錄下來。

[[email protected] python3]# pip --versionpip 8.1.2 from /usr/lib/python2.7/site-packages (python 2.7)[[email protected] python3]# python -m ensurepip --default-pipLooking in links: /tmp/tmpzzl1ppcaRequirement already satisfied: setuptools in ./lib/python3.7/site-packages (39.0.1)Requirement already satisfied: pip in ./lib/python3.7/site-packages (10.0.1)[[email protected] python3]# cd /user/bin-bash: cd: /user/bin: 沒有那個檔案或目錄[[email protected] python3]# cd /usr/bin[[email protected] bin]# ls pip*pip  pip2  pip2.7[[email protected] bin]# mv pip pip.bak[[email protected] bin]# cd ./lib/python3.7/site-packages (10.0.1)-bash: 未預期的符號 `(' 附近有語法錯誤[[email protected] bin]# cd usr/lib/python3.7/site-packages (10.0.1)-bash: 未預期的符號 `(' 附近有語法錯誤[[email protected] bin]# cd usr/lib/python3.7/site-packages -bash: cd: usr/lib/python3.7/site-packages: 沒有那個檔案或目錄[[email protected] bin]# mv pip.bak pip[[email protected] bin]# ls pip*pip  pip2  pip2.7[[email protected] bin]# cd usr/lib/python3.7-bash: cd: usr/lib/python3.7: 沒有那個檔案或目錄[[email protected] bin]# cd usr/local/python3-bash: cd: usr/local/python3: 沒有那個檔案或目錄[[email protected] bin]# cd /usr/lib/python3.7-bash: cd: /usr/lib/python3.7: 沒有那個檔案或目錄[[email protected] bin]# cd /usr/local[[email protected] local]# cd python3[[email protected] python3]# ls pip*ls: 無法訪問pip*: 沒有那個檔案或目錄[[email protected] python3]# lsbin  include  lib  share[[email protected] python3]# cd lib[[email protected] lib]# cd lib-bash: cd: lib: 沒有那個檔案或目錄[[email protected] lib]# ls pip*ls: 無法訪問pip*: 沒有那個檔案或目錄[[email protected] lib]# cd ..[[email protected] python3]# cd bin[[email protected] bin]# ls pip*pip3  pip3.7[[email protected] bin]# ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3[[email protected] bin]# pip3 --versionpip 10.0.1 from /usr/local/python3/lib/python3.7/site-packages/pip (python 3.7)

總結：

1.Python3 在解壓，在預定目錄，編譯安裝之後，產生了Python、pip的執行檔案。

2.在系統中的指令存在於不同系統的 /usr/*/bin/ 檔案夾中，如有需要可以自己去建立軟鏈。

親情連結：
簡書
部落格園

centos自訂安裝pip3