I want to convert the contents of *.sav file into a *.csv file in Python. I have written the following lines of code to access the details of variables in *.sav file. Now, I am not clear on how I can write the accessed variable data to a .csv file with headers import scipy.io as spio on2file = 'ON2_2015_112m_220415.sav' on2data = spio.readsav(on2file, python_dict=True, verbose=True) Following is the result when I run the above lines of the code: IDL Save file is compressed -> expanding to /var/folders/z4/r3844ql123jgkq1ztdr4jxrm0000gn/T/tmpVE_Iz6.sav -------------------------------------------------- Date: Mon Feb 15 20:41:02 2016 User: zhangy1 Host: augur -------------------------------------------------- Format: 9 Architecture: x86_64 Operating System: linux IDL Version: 7.0 -------------------------------------------------- Successfully read 11 records of which: - 7 are of type VARIABLE - 1 are of type TIMESTAMP - 1 are of type NOTICE - 1 are of type VERSION -------------------------------------------------- Available variables: - saved_data [<class 'numpy.recarray'>] - on2_grid_smooth [<type 'numpy.ndarray'>] - d_lat [<type 'numpy.float32'>] - on2_grid [<type 'numpy.ndarray'>] - doy [<type 'str'>] - year [<type 'str'>] - d_lon [<type 'numpy.float32'>] -------------------------------------------------- Can anyone suggest me with how I can write all the variable data to a .csv file? I want to write the variables (year, doy, d_lon, d_lat, on2_grid, on2_grid_smooth) to a CSV or ASCII file is supposed to look in the following manner: longitude, latitude, on2_grid, on2_grid_smooth # header 0.0,0.0,0.0,0.0 0.0,0.0,0.0,0.0 0.0,0.0,0.0,0.0 0.0,0.0,0.0,0.0 ..... The shape of "on2_grid" and "on2_grid_smooth" variables is the same and is (101, 202). Both are of the type "numpy.ndarray". Continue reading...