TensorFlow: ImportError: cannot import name 'dragon4_positional'
This looks like it is an issue with Numpy, which is a dependency of Tensorflow. Did you try upgrading your version of numpy using pip or conda?
Like such: pip install --ignore-installed --upgrade numpy
I get the following error when trying to use tensorflow

importError                               Traceback (most recent call
  last)  in ()
  ----> 1 import tensorflow as tf
~\Anaconda3\lib\site-packages\tensorflow__init__.py in ()
       22 
       23 # pylint: disable=wildcard-import
  ---> 24 from tensorflow.python import *
       25 # pylint: enable=wildcard-import
       26 
~\Anaconda3\lib\site-packages\tensorflow\python__init__.py in
  ()
       54 # imported using tf.load_op_library() can access symbols defined in
       55 # _pywrap_tensorflow.so.
  ---> 56 import numpy as np
       57 try:
       58   if hasattr(sys, 'getdlopenflags') and hasattr(sys, 'setdlopenflags'):
~\Anaconda3\lib\site-packages\numpy__init__.py in ()
      140         return loader(*packages, **options)
      141 
  --> 142     from . import add_newdocs
      143     all = ['add_newdocs',
      144                'ModuleDeprecationWarning',
~\Anaconda3\lib\site-packages\numpy\add_newdocs.py in ()
       11 from future import division, absolute_import, print_function
       12 
  ---> 13 from numpy.lib import add_newdoc
       14 
       15 ###############################################################################
~\Anaconda3\lib\site-packages\numpy\lib__init__.py in ()
        6 from numpy.version import version as version
        7 
  ----> 8 from .type_check import *
        9 from .index_tricks import *
       10 from .function_base import *
~\Anaconda3\lib\site-packages\numpy\lib\type_check.py in ()
        9            'common_type']
       10 
  ---> 11 import numpy.core.numeric as _nx
       12 from numpy.core.numeric import asarray, asanyarray, array, isnan, zeros
       13 from .ufunclike import isneginf, isposinf
~\Anaconda3\lib\site-packages\numpy\core__init__.py in ()
       36 from . import numerictypes as nt
       37 multiarray.set_typeDict(nt.sctypeDict)
  ---> 38 from . import numeric
       39 from .numeric import *
       40 from . import fromnumeric
~\Anaconda3\lib\site-packages\numpy\core\numeric.py in ()
  1818     1819 # Use numarray's printing function
  -> 1820 from .arrayprint import array2string, get_printoptions, set_printoptions    1821     1822 
~\Anaconda3\lib\site-packages\numpy\core\arrayprint.py in ()
       42 from .umath import absolute, not_equal, isnan, isinf, isfinite, isnat
       43 from . import multiarray
  ---> 44 from .multiarray import (array, dragon4_positional, dragon4_scientific,
       45                          datetime_as_string, datetime_data, dtype, ndarray,
       46                          set_legacy_print_mode)

This error occured after I tried to upgrade TF from version 1.1 to the latest version. So I dont know what current TF version I am using.
I am using Windows 10 without a GPU.
Do you know how to fix it?