ImportError: this is MySQLdb version (1, 2, 5, 'final', 1), but _mysql is version (1, 4, 4, 'final', 0)

(flask-demo) ➜ flask-demo git:(master) ✗ pip install mysqlclient==1.2.5
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
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ERROR: Could not find a version that satisfies the requirement mysqlclient==1.2.5 (from versions: 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.3.5, 1.3.6, 1.3.7, 1.3.8, 1.3.9, 1.3.10, 1.3.11rc1, 1.3.11, 1.3.12, 1.3.13, 1.3.14, 1.4.0rc1, 1.4.0rc2, 1.4.0rc3, 1.4.0, 1.4.1, 1.4.2, 1.4.2.post1, 1.4.3, 1.4.4)
ERROR: No matching distribution found for mysqlclient==1.2.5
(flask-demo) ➜ flask-demo git:(master) ✗ pip install MySQL-python
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
Looking in indexes: http://pypi.douban.com/simple
Requirement already satisfied: MySQL-python in /Users/wang/.virtualenvs/flask-demo/lib/python2.7/site-packages (1.2.5)
(flask-demo) ➜ flask-demo git:(master) ✗ pip install mysqlclient==1.3.0
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
Looking in indexes: http://pypi.douban.com/simple
Collecting mysqlclient==1.3.0
Downloading http://pypi.doubanio.com/packages/6a/91/bdfe808fb5dc99a5f65833b370818161b77ef6d1e19b488e4c146ab615aa/mysqlclient-1.3.0.tar.gz (76kB)
|████████████████████████████████| 81kB 1.9MB/s
Building wheels for collected packages: mysqlclient
Building wheel for mysqlclient (setup.py) ... done
Created wheel for mysqlclient: filename=mysqlclient-1.3.0-cp27-cp27m-macosx_10_14_intel.whl size=44252 sha256=9227ae6803ea4590b6d18684e525b4b14958d2403aee820c6181ab1578cca342
Stored in directory: /Users/wang/Library/Caches/pip/wheels/03/17/c0/a1134f10bd894aec20af7d555f675e02a83552609d128e0756
Successfully built mysqlclient
Installing collected packages: mysqlclient
Found existing installation: mysqlclient 1.4.4
Uninstalling mysqlclient-1.4.4:
Successfully uninstalled mysqlclient-1.4.4
Successfully installed mysqlclient-1.3.0