Upgrade Python2.6 to Python2.7 in CentOS 6. X, python2.6python2.7

Upgrade Python2.6 to Python2.7 in CentOS 6. X, python2.6python2.7

Step 1: Upgrade python

The default Python version installed in CentOs 6. x is 2.6.x. to upgrade to Python2.7.x, download the source file from the official website, decompress and compile the file.

wget http://www.python.org/ftp/python/2.7.10/Python-2.7.10.tar.xzunxz Python-2.7.10.tar.xztar -vxf Python-2.7.10.tar

After running the preceding command, decompress the Python-2.7.10 folder, enter the directory, and execute the following command to configure

./configure --enable-shared --enable-loadable-sqlite-extensions --with-zlib

Where--enable-loadable-sqlite-extensionsIt is an extension of sqlite. This option is included if needed.

You need to modify the Setup file before compilation, and remove the comments of zlib required for compilation.

vi ./Modules/Setup

Find#zlib zlibmodule.c -I$(prefix)/include -L$(exec_prefix)/lib -lzRemove comments and save them, and then compile and install them.

make && make install

After installing Python2.7, we need to back up Python2.6 and then modify the yum configuration. If this step is not performed, running the yum command will prompt you that your Python version is incorrect. Run the following command to back up Python2.6 and then create a soft link for Python2.7:

mv /usr/bin/python /usr/bin/python2.6.6ln -s /usr/local/bin/python2.7 /usr/bin/python

Edit/usr/bin/yum#!/usr/bin/pythonModify#!/usr/bin/python2.6.6

The preceding error message is no longer displayed when you run the yum command. Run python-V to view version information. If an error occurs

error while loading shared libraries: libpython2.7.so.1.0: cannot open shared object file: No such file or directory

Edit configuration file

vi /etc/ld.so.conf

Add a new line of content/usr/local/lib, Save and exit, and then

/sbin/ldconfig /sbin/ldconfig -v

Step 2: Install pip

Download the latest pip version, and then install

wget https://bootstrap.pypa.io/get-pip.pypython get-pip.py

Locate pip

whereis pip

Find the path of pip2.7 and create a soft chain for it as the default startup version of the system.

ln -s /usr/local/bin/pip2.7 /usr/bin/pip

Pip has been installed. Now you can use it to install various required packages :)

Step 3: Install scrapy

Directpip install scrapy OK.

Summary

The above are all the steps for upgrading from Python2.6 to Python2.7 in CentOS 6. X. Have you learned this? I hope this article will help you in your study or work.