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ARROW-368: Added note for LD_LIBRARY_PATH in Python README #199

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ARROW-368: Added note for LD_LIBRARY_PATH in Python README #199

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9 changes: 8 additions & 1 deletion python/README.md
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Expand Up @@ -33,12 +33,19 @@ These are the various projects that PyArrow depends on.
1. **g++ and gcc Version >= 4.8**
2. **cmake > 2.8.6**
3. **boost**
4. **Arrow-cpp and its dependencies***
4. **Arrow-cpp and its dependencies**

The Arrow C++ library must be built with all options enabled and installed with
``ARROW_HOME`` environment variable set to the installation location. Look at
(https://github.com/apache/arrow/blob/master/cpp/README.md) for instructions.

Ensure PyArrow can locate the Arrow-cpp shared libraries by setting the
LD_LIBRARY_PATH environment variable.

```bash
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ARROW_HOME/lib
```

5. **Python dependencies: numpy, pandas, cython, pytest**

#### Build pyarrow and run the unit tests
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