1. Install python3
1.1 download python source package
Download address: https://www.python.org/ftp/python/3.6.6/Python-3.6.6.tgz
To compile and install Python 3.6 1. Download Python 3 source package 2. Download Python 3 compiled dependency package 3. Decompress the source package 4. Enter the source package folder 5. Compile and install 1. Enter the source package directory 2. LS view source package content 3. Release the Makefile 4. compilation 5. Compile and install, and this step will finally generate / opt/python36/ 6. Go to the / opt directory to view the python36 folder. All python3 we want are here 6. Change the path variable of linux and add python3 Be sure to put the directory of python3 first To make the path settings permanent, add them to the / etc/profile global environment variable configuration file Reload configuration file / etc/profile 7. Install django module 8. Check the python modules of the current interpreter
1.1.1 the library environment before installing python is very important
yum install -y gcc patch libffi-devel python-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel
1.2 download, decompress and install the source package
tar -xvf Python-3.6.6.tgz cd Python-3.6.6 # Enter the source package folder
This step is generally used to generate makefiles to prepare for the next step of compilation. You can control the installation by adding parameters after configure, such as code:
The above meaning is to install the software under / usr, the execution file will be installed in / usr/bin (instead of the default / usr/local/bin), and the resource file will be installed in / usr/share (instead of the default / usr/local/share).
At the same time, some software configuration files can be set by specifying the -- sys config = parameter. Some software can also add -- with, -- enable, -- without, -- disable and other parameters to control the compilation. You can check the detailed instructions help by allowing. / configure --help.
This step is compilation. Most source code packages are compiled in this step (of course, some software written by perl or python needs to call perl or python to compile).
If there is an error in the process of making, you should write down the error code (note that it is not only the last line), and then you can submit the bug report to the developer (usually there is a submission address in INSTALL), or your system has less dependency libraries, etc., which need to study the error code carefully.
The function of make is to start source code compilation and provide some functions. These functions are provided by its Makefile settings file. For example, make install generally means to install. make uninstall means to uninstall. Without parameters, it is the default to compile source code.
make is Linux A control program for automatic compilation in the development kit. It calls automatically through the compilation specification written in Makefile gcc , ld, and programs that run some required programs for compilation. In general, the Makefile control code he uses is generated by the configure setup script based on the given parameters and system environment.
This command is used for installation (of course, some software needs to run make check or make test first for some tests). This step generally requires that you have root permission (because you need to write files to the system)
xz -d Python-3.6.7.tar.xz
tar -xf Python-3.6.7.tar
#yum install gcc -y
./configure --prefix=/opt/python make && make install
use python View default installation path
>>> import sys
['', '/usr/local/lib/python36.zip', '/usr/local/lib/python3.6',
python3.4 Not added by default path
stay/etc/profile Last line add
#python Quick path It was changed, yum Used python2，trouble
# Try to install django Come by python3 The interpreter runs it
pip3 install -i https://pypi.douban.com/simple django==1.11.16
# Create django project and APP
django-admin startproject mysite
django-admin startapp app01
1.2.3 automatic completion of Newton tab
After downloading setuptool 3.4, easy? Install-3.4 is installed by default
Download address: https://pypi.python.org/pypi/setuptools/36.2.7 //Download command: wget https://pypi.python.org/packages/07/a0/11d3d76df54b9701c0f7bf23ea9b00c61c5e14eb7962bb29aed866a5844e/setuptools-36.2.7.zip#md5=b9e6c049617bac0f9e908a41ab4a29ac Decompression: unzip setuptools-36.2.7.zip //Compile: python3 setup.py build python2 setup.py build //Installation after no error: python3 setup.py install python2 setup.py install
#yum install -y readline-devel -y #pip install readline
#python startup file
python Historical record
history_file = os.path.join(os.environ["HOME"],".pythonhistory")
Whole code[root@mm_local ~]# echo "export PYTHONSTARTUP='/root/.pythonstartup'" >> /root/.bashrc [root@mm_local ~]# source /root/.bashrc [root@mm_local ~]# cat /root/.pythonstartup import os import readline import rlcompleter import atexit #tab completion readline.parse_and_bind("tab: complete") #history file history_file = os.path.join(os.environ["HOME"],".pythonhistory") try: readline.read_history_file(history_file) except IOError: pass atexit.register(readline.write_history_file,history_file) del os,history_file,readline,rlcompleter [root@mm_local ~]# python Python 2.7.3 (default, Jun 5 2013, 22:40:26) [GCC 4.4.6 20110731 (Red Hat 4.4.6-3)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import sys >>> sys.path<tab> #Press tab The key will automatically complete [root@mm_local ~]# python >>> >>> sys.path #Press the up and down arrow keys to find the history command
Add python's startup environment variable to make it permanent and automatic
Just execute one command at startup import rlcompleter, readline readline.parse_and_bind('tab:complete') You can save the above code in ~ /. pythonrc.py file. Then, set it in ~ /. bashrc export PYTHONSTARTUP=~/.pythonrc.py In this way, bash will set the environment variable PYTHONSTARTUP every time it starts the terminal, and then python will use the initialization code in the file specified by this variable when it starts. In the python interpreter, enter a part of a variable, or add a period after the variable, and then press TAB to see the power of auto completion.