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I am trying to have Python 64-bit with ArcGIS so that I can use my entire RAM when doing data analysis. Apparently ArcGIS 10.2 Desktop comes just with 'Python 32-bit'. Should I install a fresh Python 64-bit and import arcpy from there? Is that going to work? I need to use arcpy and scipy libraries for my data analysis and I need to call both of these libraries in my Python code. Is there a better way to run 'Python 64-bit' with ArcGIS?

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64-bit Background Geoprocessing installs a 64-bit version of Python 2.7.2, NumPy and Matplotlib if they are not already installed. By default they will be installed to C:\Python27\ArcGISx6410.1 (note the x64 in the path), an additional install from the 32-bit Python (C:\Python27\ArcGIS10.1) that Desktop and Engine install and use. –  Mapperz Aug 7 at 20:16
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@Mapperz, can you post this as an answer? –  Jason Scheirer Aug 7 at 20:23
    
set PYTHONPATH=%PYTHONPATH%;C:\My_python_lib docs.python.org/3.3/using/windows.html –  Mapperz Aug 7 at 20:29

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64-bit Background Geoprocessing with ArcGIS

64-bit Background Geoprocessing installs a 64-bit version of Python 2.7.2, NumPy and Matplotlib if they are not already installed. By default they will be installed to C:\Python27\ArcGISx6410.1 (note the x64 in the path), an additional install from the 32-bit Python (C:\Python27\ArcGIS10.1) that Desktop and Engine install and use

source: http://blogs.esri.com/esri/arcgis/2012/11/12/python-scripting-with-64-bit-processing/

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My Python directory currently is C:\Python27\ArcGIS 10.2. How can I install 64-bit background Geoprocessing on top of Python 32-bit that I already have? –  bikhaab Aug 7 at 20:28
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@bikhaab You don't install it "on top." You install a separate Python interpreter in a separate location (via the 64 bit background processing installer) and use that. –  Jason Scheirer Aug 7 at 20:40
    
I'm trying to download and install it from this link. Though, I get an error regarding redistributing C++ 2010 while installing it. Is that the right file for ArcGIS 10.2.2? –  bikhaab Aug 7 at 20:52
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at the bottom ArcGIS-1022-BGDT-SRC-Patch.msp support.esri.com/en/downloads/patches-servicepacks/view/… –  Mapperz Aug 7 at 21:01
    
After downloading and trying to install, I get this error: The upgrade patch cannot be installed by the Windows Installer service because the program to be upgraded is missing, or the upgrade patch may upgrade a different version of the program I'm pretty sure that I have ArcGIS 10.2.2 installed!! Any thoughts on that? –  bikhaab Aug 7 at 23:15

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