The Python "filter"
function can be used in a similar way to idl "where"
function.
See other Python functions like "map"
and "reduce"
The Python Pocket Reference Book:
Link to NCAS Python tutorial notes
https://drive.google.com/drive/folders/0B8zznD_2CvEJYk5KcUlLUG80WUk
Andy Heaps Python for IDL user guide: http://www.met.reading.ac.uk/~swsheaps/python.html
CF-Python: http://cfpython.bitbucket.org/
CF-Plot: http://ajheaps.github.io/cf-plot/
If needed:
$ pip install virtualenv
Create project folder
$ mkdir project_folder
$ cd project_folder
Setup a virtualenv with a specific version of python and inherit system site packages
$ virtualenv -p /usr/bin/python2.7 --system-site-packages venv
Make a shortcut file
$ echo ". venv/bin/activate" > setup_env.sh
Which contains the code to activate the virtual environment
To deactivate the environment simply type
$ deactivate
The python de-bugger (pdb)
is imported as a package:
import pdb;
Step through your code from a given point by setting:
pdb.set_trace()
To recompile a module without leaving an interactive session
reload(module)
r
Opens a file for reading only. The file pointer is placed at the beginning of the file. This is the default mode.
rb
Opens a file for reading only in binary format. The file pointer is placed at the beginning of the file. This is the default mode.
r+
Opens a file for both reading and writing. The file pointer will be at the beginning of the file.
rb+
Opens a file for both reading and writing in binary format. The file pointer will be at the beginning of the file.
w
Opens a file for writing only. Overwrites the file if the file exists. If the file does not exist, creates a new file for writing.
wb
Opens a file for writing only in binary format. Overwrites the file if the file exists. If the file does not exist, creates a new file for writing.
w+
Opens a file for both writing and reading. Overwrites the existing file if the file exists. If the file does not exist, creates a new file for reading and writing.
wb+
Opens a file for both writing and reading in binary format. Overwrites the existing file if the file exists. If the file does not exist, creates a new file for reading and writing.
a
Opens a file for appending. The file pointer is at the end of the file if the file exists. That is, the file is in the append mode. If the file does not exist, it creates a new file for writing.
ab
Opens a file for appending in binary format. The file pointer is at the end of the file if the file exists. That is, the file is in the append mode. If the file does not exist, it creates a new file for writing.
a+
Opens a file for both appending and reading. The file pointer is at the end of the file if the file exists. The file opens in the append mode. If the file does not exist, it creates a new file for reading and writing.
ab+
Opens a file for both appending and reading in binary format. The file pointer is at the end of the file if the file exists. The file opens in the append mode. If the file does not exist, it creates a new file for reading and writing.