title: OSError: Version mismatch while installing h2o?
body: <p>I am new with H2o. Based in the <a href="https://github.com/h2oai/h2o-3/blob/master/h2o-docs/src/booklets/v2_2015/PDFs/online/Python_Vignette.pdf" rel="nofollow">documentation</a> I installed H2o for python </p>
  
  <pre><code>$ pip install h2o
  </code></pre>
  
  <p>Then:</p>
  
  <p>In:</p>
  
  <pre><code>import h2o
  h2o.init()
  </code></pre>
  
  <p>Out:</p>
  
  <hr>
  
  <pre><code>OSError                                   Traceback (most recent call last)
  &lt;ipython-input-1-07f8bb8f27db&gt; in &lt;module&gt;()
        1 import h2o
  ----&gt; 2 h2o.init()
  
  /usr/local/lib/python3.5/site-packages/h2o/h2o.py in init(ip, port, start_h2o, enable_assertions, license, nthreads, max_mem_size, min_mem_size, ice_root, strict_version_check, proxy, https, insecure, username, password, max_mem_size_GB, min_mem_size_GB, proxies, size)
      849                 nthreads=nthreads,max_mem_size=max_mem_size,min_mem_size=min_mem_size,ice_root=ice_root,
      850                 strict_version_check=strict_version_check,proxy=proxy,https=https,insecure=insecure,username=username,
  --&gt; 851                 password=password,max_mem_size_GB=max_mem_size_GB,min_mem_size_GB=min_mem_size_GB,proxies=proxies,size=size)
      852   return None
      853 
  
  /usr/local/lib/python3.5/site-packages/h2o/connection.py in __init__(self, ip, port, start_h2o, enable_assertions, license, nthreads, max_mem_size, min_mem_size, ice_root, strict_version_check, proxy, https, insecure, username, password, max_mem_size_GB, min_mem_size_GB, proxies, size)
      173           raise EnvironmentError("Version mismatch. H2O is version {0}, but the h2o-python package is version {1}. "
      174                                  "This is a developer build, please contact your developer."
  --&gt; 175                                  "".format(ver_h2o, str(ver_pkg)))
      176         else:
      177           raise EnvironmentError("Version mismatch. H2O is version {0}, but the h2o-python package is version {1}. "
  
  OSError: Version mismatch. H2O is version 3.8.2.99999, but the h2o-python package is version 3.8.2.6-1. This is a developer build, please contact your developer.
  </code></pre>
  
  <p>From this <a href="https://groups.google.com/forum/#!topic/h2ostream/DkeDsggRX2c" rel="nofollow">website</a>, I tried to solve this issue as follows:</p>
  
  <pre><code>h2o.shutdown
  </code></pre>
  
  <p>Then:</p>
  
  <pre><code>user@MacBook-Pro-of-User:~$ pip3 uninstall h2o
  Uninstalling h2o-3.8.2.6-1:
    /usr/local/h2o_data/iris.csv
    /usr/local/h2o_data/prostate.csv
    /usr/local/h2o_jar/h2o.jar
    /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/DESCRIPTION.rst
    /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/INSTALLER
    /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/METADATA
    /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/RECORD
    /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/WHEEL
    /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/metadata.json
    /usr/local/lib/python3.5/site-packages/h2o-3.8.2.6_1.dist-info/top_level.txt
    /usr/local/lib/python3.5/site-packages/h2o/__init__.py
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/__init__.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/assembly.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/astfun.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/connection.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/cross_validation.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/demo.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/display.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/expr.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/frame.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/group_by.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/h2o.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/h2o_logging.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/job.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/__pycache__/two_dim_table.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/assembly.py
    /usr/local/lib/python3.5/site-packages/h2o/astfun.py
    /usr/local/lib/python3.5/site-packages/h2o/connection.py
    /usr/local/lib/python3.5/site-packages/h2o/cross_validation.py
    /usr/local/lib/python3.5/site-packages/h2o/demo.py
    /usr/local/lib/python3.5/site-packages/h2o/display.py
    /usr/local/lib/python3.5/site-packages/h2o/estimators/__init__.py
    /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/__init__.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/deeplearning.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/estimator_base.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/gbm.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/glm.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/glrm.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/kmeans.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/naive_bayes.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/estimators/__pycache__/random_forest.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/estimators/deeplearning.py
    /usr/local/lib/python3.5/site-packages/h2o/estimators/estimator_base.py
    /usr/local/lib/python3.5/site-packages/h2o/estimators/gbm.py
    /usr/local/lib/python3.5/site-packages/h2o/estimators/glm.py
    /usr/local/lib/python3.5/site-packages/h2o/estimators/glrm.py
    /usr/local/lib/python3.5/site-packages/h2o/estimators/kmeans.py
    /usr/local/lib/python3.5/site-packages/h2o/estimators/naive_bayes.py
    /usr/local/lib/python3.5/site-packages/h2o/estimators/random_forest.py
    /usr/local/lib/python3.5/site-packages/h2o/expr.py
    /usr/local/lib/python3.5/site-packages/h2o/frame.py
    /usr/local/lib/python3.5/site-packages/h2o/grid/__init__.py
    /usr/local/lib/python3.5/site-packages/h2o/grid/__pycache__/__init__.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/grid/__pycache__/grid_search.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/grid/__pycache__/metrics.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/grid/grid_search.py
    /usr/local/lib/python3.5/site-packages/h2o/grid/metrics.py
    /usr/local/lib/python3.5/site-packages/h2o/group_by.py
    /usr/local/lib/python3.5/site-packages/h2o/h2o.py
    /usr/local/lib/python3.5/site-packages/h2o/h2o_logging.py
    /usr/local/lib/python3.5/site-packages/h2o/job.py
    /usr/local/lib/python3.5/site-packages/h2o/model/__init__.py
    /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/__init__.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/autoencoder.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/binomial.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/clustering.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/confusion_matrix.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/dim_reduction.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/metrics_base.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/model_base.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/model_builder.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/model_future.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/multinomial.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/model/__pycache__/regression.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/model/autoencoder.py
    /usr/local/lib/python3.5/site-packages/h2o/model/binomial.py
    /usr/local/lib/python3.5/site-packages/h2o/model/clustering.py
    /usr/local/lib/python3.5/site-packages/h2o/model/confusion_matrix.py
    /usr/local/lib/python3.5/site-packages/h2o/model/dim_reduction.py
    /usr/local/lib/python3.5/site-packages/h2o/model/metrics_base.py
    /usr/local/lib/python3.5/site-packages/h2o/model/model_base.py
    /usr/local/lib/python3.5/site-packages/h2o/model/model_builder.py
    /usr/local/lib/python3.5/site-packages/h2o/model/model_future.py
    /usr/local/lib/python3.5/site-packages/h2o/model/multinomial.py
    /usr/local/lib/python3.5/site-packages/h2o/model/regression.py
    /usr/local/lib/python3.5/site-packages/h2o/transforms/__init__.py
    /usr/local/lib/python3.5/site-packages/h2o/transforms/__pycache__/__init__.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/transforms/__pycache__/decomposition.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/transforms/__pycache__/preprocessing.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/transforms/__pycache__/transform_base.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/transforms/decomposition.py
    /usr/local/lib/python3.5/site-packages/h2o/transforms/preprocessing.py
    /usr/local/lib/python3.5/site-packages/h2o/transforms/transform_base.py
    /usr/local/lib/python3.5/site-packages/h2o/two_dim_table.py
    /usr/local/lib/python3.5/site-packages/h2o/utils/__init__.py
    /usr/local/lib/python3.5/site-packages/h2o/utils/__pycache__/__init__.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/utils/__pycache__/shared_utils.cpython-35.pyc
    /usr/local/lib/python3.5/site-packages/h2o/utils/shared_utils.py
  Proceed (y/n)? y
    Successfully uninstalled h2o-3.8.2.6-1
  user@MacBook-Pro-of-User:~$
  </code></pre>
  
  <p>Then I tried to upgrade to the latest version:</p>
  
  <pre><code>user@MacBook-Pro-of-User:~$ pip3 install http://h2o-release.s3.amazonaws.com/h2o/rel-turchin/6/Python/h2o-3.8.2.6-py2.py3-none-any.whl
  </code></pre>
  
  <p>However, I got the same error message:</p>
  
  <pre><code>OSError: Version mismatch. H2O is version 3.8.2.99999, but the h2o-python package is version 3.8.2.6. This is a developer build, please contact your developer.
  </code></pre>
  
  <p>How to correctly install h2o for python?.</p>