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arcpy install fears

TedCronin

I fear that since you went down this path of controlling the python install, if I set up additional modules, packages, etc..., that when the time comes, I uninstall 10, and this will in turn kill everything else. Has anyone tested this scenario, this potentially painful scenario?

On test machines, who cares but production machines, this is a big worry.

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TedCronin

Sorry it wasn't easier, the important thing, I suppose is you are able to start scripting.

Was there an arcpy folder in C:\Program Files (x86)\ArcGIS\Desktop10.0? I am thinking this gets installed regardless, I can't say ever installing ArcGIS w/o python though, so you are the most experienced person I have met on these forums for this issue.

TimWallace2

I would create a file, a text file, save it as a .pth file with the following paths (On Win7) and place it in the Lib\site-packages folder:

C:\Program Files (x86)\ArcGIS\Desktop10.0\bin
C:\Program Files (x86)\ArcGIS\Desktop10.0\arcpy
C:\Program Files (x86)\ArcGIS\Desktop10.0\ArcToolbox\Scripts

Make sure you install python 2.6.5, and numpy 1.0.3.

Make sure you have arcpy in the ArcGIS path like: C:\Program Files (x86)\ArcGIS\Desktop10.0\arcpy. If arcpy is here, then the .pth file should work. if arcpy is not located here, then I would try the add features for the install to try and trigger the arcpy ArcGIS scripts to load.

Thanks for this, Ted. I went through all of these steps (and tried a few other things suggested in various similar forums), but wasn't able to get it running properly until I used the original install disk to run a "modify install".

The good news is that I am finally up and running! Thanks again for your help.

TedCronin

Thanks, Ted. I'm having trouble locating the .pth file. Do you know where it usually lives or whether it is simply a matter of creating one? Thanks again.

I would create a file, a text file, save it as a .pth file with the following paths (On Win7) and place it in the Lib\site-packages folder:

C:\Program Files (x86)\ArcGIS\Desktop10.0\bin
C:\Program Files (x86)\ArcGIS\Desktop10.0\arcpy
C:\Program Files (x86)\ArcGIS\Desktop10.0\ArcToolbox\Scripts

Make sure you install python 2.6.5, and numpy 1.0.3.

Make sure you have arcpy in the ArcGIS path like: C:\Program Files (x86)\ArcGIS\Desktop10.0\arcpy. If arcpy is here, then the .pth file should work. if arcpy is not located here, then I would try the add features for the install to try and trigger the arcpy ArcGIS scripts to load.

TimWallace2

Should be able to just install python and numpy, and then change the .pth file, rather than re installing ArcGIS.

Thanks, Ted. I'm having trouble locating the .pth file. Do you know where it usually lives or whether it is simply a matter of creating one? Thanks again.

TedCronin

I am using a student license of ArcMap 10 (build 2414) and I would like to get Arcpy working. I did not install Python or Numpy before installing Arc.

Is the only solution for me to completely uninstall Arc, install Python 2.6 & Numpy 1.3 and reinstall Arc?

Thanks!

Should be able to just install python and numpy, and then change the .pth file, rather than re installing ArcGIS.

TimWallace2

I am using a student license of ArcMap 10 (build 2414) and I would like to get Arcpy working. I did not install Python or Numpy before installing Arc.

Is the only solution for me to completely uninstall Arc, install Python 2.6 & Numpy 1.3 and reinstall Arc?

Thanks!

TedCronin

ArcGIS 10 final will ship with one and only one version of python. At Pre-release we have 2.6.2. Most probably for 10 final we will have 2.6.5. Having said that, ArcGIS 10 will work with any 2.6 version of python. So say 6 months from now, we have Python 2.6.6 released but ArcGIS is using only 2.6.5, you can safely install Python 2.6.6 and ArcGIS will work ok. Note that this compatibility works only with a major release of Python. In other words ArcGIS 10 will never work with Python 2.7 or Python 3.1 or any other major release of python. Only Python 2.6 is supported.

Also note that you should also install numpy 1.3.0 BEFORE installing ArcGIS 10. Only installing Python 2.6.5 and not installing numpy 1.3.0 WILL confuse the ArcGIS 10 installer (at pre-release) and you will get unwanted results. So always keep Python 2.6.x and Numpy 1.3.0 together and things will work well.

Deelesh

I love to confuse ArcMap, its great fun 🙂

Pat Ghis on the back and tell him he is doing a great job, if he is still there.

dmandloi

ArcGIS 10 final will ship with one and only one version of python. At Pre-release we have 2.6.2. Most probably for 10 final we will have 2.6.5. Having said that, ArcGIS 10 will work with any 2.6 version of python. So say 6 months from now, we have Python 2.6.6 released but ArcGIS is using only 2.6.5, you can safely install Python 2.6.6 and ArcGIS will work ok. Note that this compatibility works only with a major release of Python. In other words ArcGIS 10 will never work with Python 2.7 or Python 3.1 or any other major release of python. Only Python 2.6 is supported.

Also note that you should also install numpy 1.3.0 BEFORE installing ArcGIS 10. Only installing Python 2.6.5 and not installing numpy 1.3.0 WILL confuse the ArcGIS 10 installer (at pre-release) and you will get unwanted results. So always keep Python 2.6.x and Numpy 1.3.0 together and things will work well.

Deelesh

TedCronin

Ahh, working late.

ok, I have done what you asked, and initially it looks ok. So, then it seems like you fixed the issue then with having a 2.6 install already on the machine, then doing the ArcGIS install, and seeing the results. This was not pretty early on, so thank you Deelesh. Will continue testing... So, then is this something that may happen early on in the 10 release where 2.6.5 will be supported, but 2.6.2 will still come in the box?

dmandloi

2.6.5 has been tested internally to work with arcpy?

ArcGIS 10 Pre-release ships with Python 2.6.2. We are still testing Python 2.6.5 but so far I have not seen any issues with using Python 2.6.5 even with 10 pre-release.

Is there any hit on performance with this scenario?

There is no performance hit. Either scenarios are identical from ArcGIS view point.

Deelesh

TedCronin

This is what I thought we would have to do, so 2.6.5 has been tested internally to work with arcpy?

Is there any hit on performance with this scenario?

dmandloi

Ted,
ArcGIS 10 requires Python 2.6.x (note the x) and numpy 1.3.0. So as long as these two compenents are already present on the machine before installing ArcGIS 10, the installer will NOT install and hence manage your python. So now you are free to install and other python package. The installer will still install the arcpy module. but it is installed within arcgis install directory
The recommened steps to use your own python install with ArcGIS 10 (pre-release) are
Before Installing ArcGIS 10 Desktop,

Install Python2.6.x (current release version is Python 2.6.5)
Install numpy 1.3.0. You must install version 1.3.0 of numpy. You can use numpy-1.3.0-win32-superpack-python2.6.exe or other appropriate installer for windows.

Now when you install ArcGIS Desktop 10, the installer will NOT install python and numpy and you are free to add any additional python packages without the fear of losing them. I have tested this scenario with Desktop 10 Pre-release.

Hope this helps.
Deelesh

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