There have been some problems with deploying Django projects to the server. Here is a summary for future reference, and I hope to help you with the same problems. (Like it if it helps! 😝)

Linux upgrade Python to 3.x

Most of the time you are carrying Python 2.x, and in order to use the new 3.x, you need to upgrade the old version

 # python --version
 Python 2.7.5
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The system version is 2.7.5

1. Download the new version

You can choose any version you want, but I’m just demonstrating it here

Wget HTTP: / / https://www.python.org/ftp/python/3.5.2/Python-3.5.2.tgzCopy the code

2. The compression

The tar ZXVF Python -- 3.5.2. TGZCopy the code

3. Install and configure

CD Python - 3.5.2 /. / configureCopy the code

If./configure fails, the compiler is not installed. In this case, you need to upgrade the dependency package

  yum install make gcc gcc-c++ 
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then

./configure 
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4. Compile and install

 make 
 make install 
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5. Verify

# python3 -V
Python 3.5.2
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6. Set the default version to 3.x

Ls - al/usr/bin | grep python - rwxr-xr-x mto. 1 root root on December 1, 11216, 2018 abrt - action - analyze - python LRWXRWXRWX. 1 root Root 6 April 30 12:11 python -> python2 LRWXRWXRWX. 1 root root 5 April 30 12:11 python2 -> python2.7 -rwxr-xr-x. 1 root root 7136 April 20 2018 PYTHon2.7Copy the code

Rename the original Python soft link:

   mv /usr/bin/python /usr/bin/python.bak
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Link Python to python3:

  ln -s /usr/local/bin/python3 /usr/bin/python
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View the results

# python -V
Python 3.5.2
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Installation ok

7. Yum

 vi /usr/bin/yum
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The #! The/usr/bin/python to #! /usr/bin/python2.7, save and exit

  vi /usr/libexec/urlgrabber-ext-down
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The #! The/usr/bin/python to #! /usr/bin/python2.7, save and exit

Error ImportError: No module named PIP — A PIP is required





Python3. x: ImportError: No module named PIP There are many ways to install PIP, but I will only describe mine

Wget https://pypi.python.org/packages/source/p/pip/pip-1.3.1.tar.gz - no - check - certificate tar XVF PIP - 1.3.1. Tar. Gz Python PIP - 1.3.1 / setup. Py installCopy the code

Setuptools Compression requires the (missing) Zlib module error: SetupTools Compression requires the (missing) Zlib Module error: SetupTools Compression requires the (missing) Zlib Module error: SetupTools Compression requires the (missing) Zlib Module error: SetupTools Compression requires the (missing) Zlib Module error

Error: SetupTools Compression requires the (missing) zlib module: SetupTools Compression requires the (missing) zlib module

  yum install zlib
  yum install zlib-devel
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Recompile Python (make)

Download the setuptools

CD setuptools-39.2.0 python setup.py installCopy the code

Install PIP after ok

ModuleNotFoundError: No module named ‘_sqlite3’ —- Install sqlite3

The simplest method (under general circumstances can be if you can not Google other methods)

/configure --prefix=/usr/local/sqlite3 make && make installCopy the code

Okay, so that’s it for now, and I’ll add it later. If you have any questions, please leave a message!