Debian 7 自带的python是2.7.3,要用最新的3.4版本怎么办？我们从官网下载压缩包自己编译。
一、安装编译用的包
$ sudo apt-get install build-essential
$ sudo apt-get install libncurses5-dev libncursesw5-dev libreadline6-dev
$ sudo apt-get install libdb5.-dev libgdbm-dev libsqlite3-dev libssl-dev
$ sudo apt-get install libbz2-dev libexpat1-dev liblzma-dev zlib1g-dev
二、下载压缩包
wget -c https://www.python.org/ftp/python/3.4.1/Python-3.4.1.tgz
三、编译安装
$ cd download/
$ tar -zxf Python-3.4..tgz
$ cd Python-3.4.
$ ./configure --prefix=/opt/python-3.4.
$ make
$ sudo make install
$ cd download/
$ sudo rm -rf Python-3.4. #删除解压目录
安装好后把 python3 添加到PATH里，打开~/.bashrc 文件，在最后添加：
export PATH=$PATH:/opt/python-3.4./bin
保存后：
source .bashrc
在终端里输入 python3,可以看到现在的版本是3.4.1。
$ python3
Python 3.4. (default, Aug , ::)
[GCC 4.6.] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
2015.01.09 更新：
在make时出现这个提示：
# Substitution happens here, as the completely-expanded BINDIR
# is not available in configure
sed -e "s,@EXENAME@,/opt/python-3.4.2/bin/python3.4m," < ./Misc/python-config.in >python-config.py
# Replace makefile compat. variable references with shell script compat. ones; ->
sed -e 's,\$(\([A-Za-z0-9_]*\)),\$\{\1\},g' < Misc/python-config.sh >python-config
# On Darwin, always use the python version of the script, the shell
# version doesn't use the compiler customizations that are provided
# in python (_osx_support.py).
if test `uname -s` = Darwin; then \
cp python-config.py python-config; \
fi
按提示操作：
$ sed -e "s,@EXENAME@,/opt/python-3.4.2/bin/python3.4m," < ./Misc/python-config.in >python-config.py
$ sed -e 's,\$(\([A-Za-z0-9_]*\)),\$\{\1\},g' < Misc/python-config.sh >python-config
再make：
$ make
最后：
sudo make install
在编译安装python3.4.2时有这个提示：
INFO: Can't locate Tcl/Tk libs and/or headers Python build finished successfully!
The necessary bits to build these optional modules were not found:
_tkinter
To find the necessary bits, look in setup.py in detect_modules() for the module's name.
解决办法：
sudo apt-get install python-tk tcl tk tcl-dev tk-dev
--End--