Install python
Download Python Package
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cd /usr/local/src
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To compile installed in advance gcc compiler and zlib zlib-devel
1. Download the file
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wget https:
//www.python.org/ftp/python/3.6.0/Python-3.6.0.tgz
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2, extract
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tar -zxvf Python-3.6.0.tgz
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3, into the extracted directory
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cd Python-3.6.0
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4, the installation package compiled
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./configure --prefix=/usr/local/python
make && make install
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5, add the environment variable
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echo PATH=
'/usr/local/python/bin/:$PATH'
>> /etc/profile
<br>source /etc/profile
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6. Check if successful, execute the code below
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python3.6
Python 3.6.0 (
default
, Jun 1 2017, 14:01:43)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)]
on
linux
Type
"help"
,
"copyright"
,
"credits"
or
"license"
for
more information.
>>> print(
'hello word'
)
hello word
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Python Installation FAQ:
(1）configure: error: no acceptable C compiler found in $PATH
Solve: yum install -y gcc
(2):zipimport.ZipImportError: can’t decompress data
Solution: install zlib zlib-devel
1, Python modify the system default path, since the default Python command input terminal is directed Python2.6.6
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mv /usr/bin/python /usr/bin/python-2.6.6
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2, the establishment of a new soft link, pointing to Python-3.6.0
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ln -s /usr/local/python/bin/python3.6 /usr/bin/python
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3, because yum is dependent python, so here we modified the default python, is necessary to modify yum, let it run point to the old version:
V / Usr / bin / Yom
The first line "#! / Usr / bin / python" changed to "#! / Usr / bin / python-2.6.6", save it
4, open a new terminal, enter the environment through the python python command, you can see we have pointed python3.6.0 newly installed:
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[centos65_1@localhost:~]$ python
Python 3.6.0 (
default
, Jul 30 2016, 19:40:32)
[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.34)]
on
darwin
Type
"help"
,
"copyright"
,
"credits"
or
"license"
for
more information.
>>>
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5, Centos yum in Python upgrade to occur except OSError, e when 3.X: ^ SyntaxError: invalid syntax problems
CentOS 7 upgrade to Python 3.6, you need to / usr / bin / python creates a soft link pointing to Python 3, then / usr / bin top / yum are:
!/usr/bin/python
Changed
!/usr/bin/python-2.7.5
After running yum, or the following error:
[root@master ~]# yum -y groupinstall “X Window System”
File "/usr/libexec/urlgrabber-ext-down", line 28
except OSError, e:
^
SyntaxError: invalid syntax
solution:
(1). vim /usr/libexec/urlgrabber-ext-down
The / usr / bin / python instead /usr/bin/python-2.7.5.
(2). vim /usr/bin/yum-config-manager
Solution above:! # / Usr / bin / python into # / usr / bin / python-2.7.5!
Uninstall python
Compile and install Python3
# 下载
# wget https://www.python.org/ftp/python/3.6.4/Python-3.6.4.tar.xz
wget http://mirrors.sohu.com/python/3.6.4/Python-3.6.4.tgz
# 解压 tar -xzvf Python-3.6.4.tgz cd Python-3.6.4 # 编译安装 # ./configure --help查看编译参数 # 默认安装在'/usr/local/bin','/usr/local/lib' etc # 可以通过参数指定如：--prefix=/usr/local/python3 ./configure make # 把安装日志保存下来 make install > install.log Uninstall Python3
Python3 understood by installation log directory is mounted in the following
/usr/local/lib/python3.6 /usr/local/bin/2to3-3.6 to /usr/local/bin/pyvenv-3.6 /usr/local/bin/pydoc3.6 /usr/local/bin/idle3.6
# 删除上述文件
rm -rf /usr/local/lib/python3.6
rm -rf /usr/local/bin/2to3-3.6 to
rm -rf /usr/local/bin/pyvenv-3.6
rm -rf /usr/local/bin/pydoc3.6
rm -rf /usr/local/bin/idle3.6