RuntimeError: module compiled against API version 0xc but this version of numpy is 0xb

Seems like this is due to pandas version higher than 0.21.0 and numpy version 1.13.3 that is pulled by TensorFlow not playing well togather. Here is how I fixed it in my end:

# ipython
Python 2.7.6 (default, Nov 23 2017, 15:49:48)
Type "copyright", "credits" or "license" for more information.

IPython 4.2.0 -- An enhanced Interactive Python.
?         -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help      -> Python's own help system.
object?   -> Details about 'object', use 'object??' for extra details.

In [1]: import tensorflow as tf
---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
RuntimeError: module compiled against API version 0xc but this version of numpy is 0xb

In [2]: !pip install pandas==0.21.0
Collecting pandas==0.21.0
/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:318: SNIMissingWarning: An HTTPS request
has been made, but the SNI (Subject Name Indication) extension to TLS is not available on this platform. This may cause the server
to present an incorrect TLS certificate, which can cause validation failures. You can upgrade to a newer version of Python to solve
 this. For more information, see https://urllib3.readthedocs.io/en/latest/security.html#snimissingwarning.
  SNIMissingWarning
/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/packages/urllib3/util/ssl_.py:122: InsecurePlatformWarning: A true SSLC
ontext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to f
ail. You can upgrade to a newer version of Python to solve this. For more information, see https://urllib3.readthedocs.io/en/latest
/security.html#insecureplatformwarning.
  InsecurePlatformWarning
  Downloading pandas-0.21.0-cp27-cp27mu-manylinux1_x86_64.whl (24.3MB)
    100% |################################| 24.3MB 52kB/s
Requirement already satisfied: pytz>=2011k in /usr/local/lib/python2.7/dist-packages (from pandas==0.21.0)
Requirement already satisfied: numpy>=1.9.0 in /usr/local/lib/python2.7/dist-packages (from pandas==0.21.0)
Requirement already satisfied: python-dateutil in /usr/local/lib/python2.7/dist-packages (from pandas==0.21.0)
Requirement already satisfied: six>=1.5 in /usr/local/lib/python2.7/dist-packages (from python-dateutil->pandas==0.21.0)
Installing collected packages: pandas
  Found existing installation: pandas 0.21.1
    Uninstalling pandas-0.21.1:
      Successfully uninstalled pandas-0.21.1
Successfully installed pandas-0.21.0

In [3]: del tf

In [4]: import tensorflow as tf

Most likely due to version of numpy too low; this one solved my problem:

pip3 install "numpy == 1.15.0" --user 

conda install can't solve because currently it only have numpy version 1.13.1, but is may due to my mirror site choosen is not the latest