old_contents: 
  import pvl_tools
  
  # '''
  # Irradiance and atmosperhic functions
  # ====================================
  # '''
  
  # from pvl_alt2pres import pvl_alt2pres
  # from pvl_pres2alt import pvl_pres2alt
  # from pvl_getaoi import pvl_getaoi
  # from pvl_disc import pvl_disc
  # from pvl_ephemeris import pvl_ephemeris
  # from pvl_spa import pvl_spa
  # from pvl_extraradiation import pvl_extraradiation
  # from pvl_globalinplane import pvl_globalinplane
  # from pvl_grounddiffuse import pvl_grounddiffuse
  # from pvl_makelocationstruct import pvl_makelocationstruct
  # from pvl_relativeairmass import pvl_relativeairmass
  # from pvl_absoluteairmass import pvl_absoluteairmass
  # from pvl_clearsky_ineichen import pvl_clearsky_ineichen
  # from pvl_clearsky_haurwitz import pvl_clearsky_haurwitz
  # '''
  # Irradiance Translation Functions
  # ================================
  # '''
  
  # from pvl_perez import pvl_perez
  # from pvl_haydavies1980 import pvl_haydavies1980
  # from pvl_isotropicsky import pvl_isotropicsky
  # from pvl_kingdiffuse import pvl_kingdiffuse
  # from pvl_klucher1979 import pvl_klucher1979
  # from pvl_reindl1990 import pvl_reindl1990
  
  # '''	
  # Data Handling
  # ==============
  # '''
  
  # import tmy 
  # '''
  # System Modelling functions
  # ==========================
  # '''
  
  # from pvl_physicaliam import pvl_physicaliam
  # from pvl_ashraeiam import pvl_ashraeiam
  # from pvl_calcparams_desoto import pvl_calcparams_desoto
  # from pvl_retreiveSAM import pvl_retreiveSAM
  # from pvl_sapm import pvl_sapm
  # from pvl_sapmcelltemp import pvl_sapmcelltemp
  # from pvl_singlediode import pvl_singlediode
  # from pvl_snlinverter import pvl_snlinverter
  # from pvl_systemdef import pvl_systemdef
  
  
  
  
new_contents: 
  import logging
  logging.basicConfig()
  
  from . import atmosphere
  from . import clearsky
  from . import irradiance
  from . import location
  from . import pvl_tools
  from . import solarposition
  from . import tmy
  
  # '''
  # Irradiance and atmosperhic functions
  # ====================================
  # '''
  
  # from pvl_alt2pres import pvl_alt2pres
  # from pvl_pres2alt import pvl_pres2alt
  # from pvl_getaoi import pvl_getaoi
  # from pvl_disc import pvl_disc
  # from pvl_ephemeris import pvl_ephemeris
  # from pvl_spa import pvl_spa
  # from pvl_extraradiation import pvl_extraradiation
  # from pvl_globalinplane import pvl_globalinplane
  # from pvl_grounddiffuse import pvl_grounddiffuse
  # from pvl_makelocationstruct import pvl_makelocationstruct
  # from pvl_relativeairmass import pvl_relativeairmass
  # from pvl_absoluteairmass import pvl_absoluteairmass
  # from pvl_clearsky_ineichen import pvl_clearsky_ineichen
  # from pvl_clearsky_haurwitz import pvl_clearsky_haurwitz
  # '''
  # Irradiance Translation Functions
  # ================================
  # '''
  
  # from pvl_perez import pvl_perez
  # from pvl_haydavies1980 import pvl_haydavies1980
  # from pvl_isotropicsky import pvl_isotropicsky
  # from pvl_kingdiffuse import pvl_kingdiffuse
  # from pvl_klucher1979 import pvl_klucher1979
  # from pvl_reindl1990 import pvl_reindl1990
  
  # '''	
  # Data Handling
  # ==============
  # '''
  
  # import tmy 
  # '''
  # System Modelling functions
  # ==========================
  # '''
  
  # from pvl_physicaliam import pvl_physicaliam
  # from pvl_ashraeiam import pvl_ashraeiam
  # from pvl_calcparams_desoto import pvl_calcparams_desoto
  # from pvl_retreiveSAM import pvl_retreiveSAM
  # from pvl_sapm import pvl_sapm
  # from pvl_sapmcelltemp import pvl_sapmcelltemp
  # from pvl_singlediode import pvl_singlediode
  # from pvl_snlinverter import pvl_snlinverter
  # from pvl_systemdef import pvl_systemdef
  
  
  
  
subject: add imports and logging to init