Here are some links you might find helpful moving forward with python
conda
cheat sheets
general python
Flopy and MODFLOW
Accessing USGS Data
hyswap Statistical analysis for hydrologic data.
dataretrieval Accessing and analyzing USGS data through NWIS.
Modflow-setup and SFRmaker
some galleries
more general references
datetime formats (jump to the bottom of the page where it says “Format Codes”)