is there a reason why str() and to_string give diffenret results on a CRS ?

[12rambau]

I tried the following:

from pyproj import CRS 

CRS(4326).to_string()
>>>> 'EPSG:4326' 

str(CRS(4326))
>>>> 'epsg:4326'

Any reason why these are not the same ?

[snowman2]

to_string attempts to convert to an authority string and falls back to the user input. It has more overhead to run. Calling str calls the __str__ method which returns the user input directly.