insert data in python script

[DL Neil]

Please help us to help you!
1 is all of this code in a single file or spread across (at least) two 
modules? What are their names? What is the directory structure?
2 copy-paste the actual error message received.


It works for me!
1 not knowing your circumstances, I put all the code in one file
2 updated one line (possibly due to above)

# methane = preos.Molecule("methane", -82.59 + 273.15, 45.99, 0.011)
methane = Molecule("methane", -82.59 + 273.15, 45.99, 0.011)

dn $ python3 Projects/molecule.py
Molecule: methane.
         	Critical Temperature = 190.6 K
         	Critical Pressure = 46.0 bar.
         	Accentric factor = 0.011000


NB if the bulk of the code is stored in a module named preos.py then it 
is necessary to first:

import peos

and restore the above change.

NBB under such conditions peos.py must be located in the file-system 
where the 'mainline' can find (and import) it!
-- 
Regards =dn