ValueError numpy dtype has the wrong size try recompiling

Question

I just installed pandas and statsmodels package on my python 2.7 When I tried "import pandas as pd", this error message comes out. 

numpy.dtype has the wrong size, try recompiling
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\analytics\ext\python27\lib\site-packages\statsmodels-0.5.0-py2.7-win32.egg\statsmodels\formula\__init__.py",
line 4, in <module>
    from formulatools import handle_formula_data
  File "C:\analytics\ext\python27\lib\site-packages\statsmodels-0.5.0-py2.7-win32.egg\statsmodels\formula\formulatools.p
y", line 1, in <module>
    import statsmodels.tools.data as data_util
  File "C:\analytics\ext\python27\lib\site-packages\statsmodels-0.5.0-py2.7-win32.egg\statsmodels\tools\__init__.py", li
ne 1, in <module>
    from tools import add_constant, categorical
  File "C:\analytics\ext\python27\lib\site-packages\statsmodels-0.5.0-py2.7-win32.egg\statsmodels\tools\tools.py", line
14, in <module>
    from pandas import DataFrame
  File "C:\analytics\ext\python27\lib\site-packages\pandas\__init__.py", line 6, in <module>
    from . import hashtable, tslib, lib
  File "numpy.pxd", line 157, in init pandas.tslib (pandas\tslib.c:49133)
ValueError: numpy.dtype has the wrong size, try recompiling

Can anyone help? 

Answer 1

Hello @kartik,

I found it to be a simple version being outdated or mismatch and was fixed with:

pip install --upgrade numpy
pip install --upgrade scipy
pip install --upgrade pandas

Or might work with the one liner:

pip install --upgrade numpy scipy pandas

Hope it is helpful!!