Changes between Initial Version and Version 1 of installSunpy

Timestamp:

07/09/21 15:53:01 (3 years ago)

Author:

niles

Comment:

--

installSunpy

@@ +1 @@
+
+== Installing sunPy in a python virtual environment ==
+
+A python virtual environment on linux or MacOS is a good way to experiment in python without affecting the system setup of python. Modules can be installed
+aside from the system version. Afterwards, the virtual environment can be deleted. Here, we install sunPy and use it in a simple
+example.
+
+First, make sure you have a fairly recent version of python. At the bare minimum, make sure it's release 3 or more :
+
+{{{
+$ python --version
+Python 3.9.6
+}}}
+
+Note that in order to get python version three, on some systems you may have to use "python3" rather than "python" for all commands.
+
+First, build a virtual environment in an appropriately name directory and enter into it by sourcing the activation file :
+
+{{{
+$ python -m venv /home/oien/johnBsunPy
+$ source /home/oien/johnBsunPy/bin/activate
+}}}
+
+At this point the system prompt will change to reflect the fact that you're in the virtual environment.
+To be sure you're in the virtual environment, check that the virtual environment versions of python and pip
+are being used :
+
+{{{
+(johnBsunPy) $ which python
+/home/oien/johnBsunPy/bin/python
+(johnBsunPy) $ which pip
+/home/oien/johnBsunPy/bin/pip
+}}}
+
+That looks good. Now upgrade pip to the latest version, and install sunPy :
+
+{{{
+(johnBsunPy) $ pip install --upgrade pip
+(johnBsunPy) $ pip install sunpy[all]
+}}}
+
+You can now use sunPy in the virtual environment :
+
+{{{
+(johnBsunPy) $ python
+Python 3.9.6 (default, Jun 30 2021, 10:22:16) 
+[GCC 11.1.0] on linux
+Type "help", "copyright", "credits" or "license" for more information.
+>>> from sunpy.net import Fido, attrs as a
+>>> result = Fido.search(a.Time('2021/02/02 16:00:00', '2021/02/02 16:30:00'), a.Instrument('big bear'), a.Physobs('intensity'))
+>>> print(result.show("Provider","Source","fileurl"))
+Results from 1 Provider:
+
+14 Results from the VSOClient:
+Provider Source                               fileurl                              
+-------- ------ -------------------------------------------------------------------
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202160950Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202161050Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202161450Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202161650Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202161750Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202161850Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202161950Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202162050Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202162150Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202162250Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202162350Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202162450Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202162650Bh.fits.fz
+     NSO   GONG ftp://gong2.nso.edu/HA/haf/202102/20210202/20210202162750Bh.fits.fz
+
+>>> exit()
+
+}}}
+
+You can leave the virtual environment with the "deactivate" command at the linux command line prompt, at which point your prompt will change back :
+
+{{{
+(johnBsunPy) $ deactivate
+$ 
+}}}
+