old_contents: from __future__ import absolute_import, division, print_function
  
  from pandas import DataFrame, Index, Series
  
  from .ctd import (
      asof,
      from_btl,
      from_bl,
      from_cnv,
      from_edf,
      from_fsi,
      rosette_summary
  )
  from .plotting import (
      extrap_sec,
      gen_topomask,
      get_maxdepth,
      plot,
      plot_section,
      plot_vars,
  )
  from .processing import (
      barrier_layer_thickness,
      bindata,
      cell_thermal_mass,
      derive_cnv,
      despike,
      lp_filter,
      mixed_layer_depth,
      movingaverage,
      press_check,
      smooth,
      split,
  )
  
  
  from ._version import get_versions  # noqa
  __version__ = get_versions()['version']
  del get_versions
  
  
  __all__ = [
      asof,
      barrier_layer_thickness,
      bindata,
      cell_thermal_mass,
      derive_cnv,
      despike,
      extrap_sec,
      from_cnv,
      from_btl,
      from_bl,
      from_edf,
      from_fsi,
      gen_topomask,
      get_maxdepth,
      lp_filter,
      mixed_layer_depth,
      movingaverage,
      plot,
      plot_section,
      plot_vars,
      press_check,
      rosette_summary,
      smooth,
      split,
  ]
  
  # Attach methods.
  Index.asof = asof
  
  Series.plot = plot
  Series.split = split
  Series.smooth = smooth
  Series.despike = despike
  Series.bindata = bindata
  Series.press_check = press_check
  
  DataFrame.split = split
  DataFrame.from_cnv = staticmethod(from_cnv)
  DataFrame.from_btl = staticmethod(from_btl)
  DataFrame.from_bl  = staticmethod(from_bl)
  DataFrame.from_edf = staticmethod(from_edf)
  DataFrame.from_fsi = staticmethod(from_fsi)
  DataFrame.plot_vars = plot_vars
  DataFrame.press_check = press_check
  DataFrame.get_maxdepth = get_maxdepth
  DataFrame.plot_section = plot_section
  
new_contents: from __future__ import absolute_import, division, print_function
  
  from pandas import DataFrame, Index, Series
  
  from .ctd import (
      asof,
      from_btl,
      from_bl,
      from_cnv,
      from_edf,
      from_fsi,
      rosette_summary
  )
  from .plotting import (
      extrap_sec,
      gen_topomask,
      get_maxdepth,
      plot,
      plot_section,
      plot_vars,
  )
  from .processing import (
      barrier_layer_thickness,
      bindata,
      cell_thermal_mass,
      derive_cnv,
      despike,
      lp_filter,
      mixed_layer_depth,
      movingaverage,
      press_check,
      smooth,
      split,
  )
  
  
  from ._version import get_versions  # noqa
  __version__ = get_versions()['version']
  del get_versions
  
  
  __all__ = [
      asof,
      barrier_layer_thickness,
      bindata,
      cell_thermal_mass,
      derive_cnv,
      despike,
      extrap_sec,
      from_cnv,
      from_btl,
      from_bl,
      from_edf,
      from_fsi,
      gen_topomask,
      get_maxdepth,
      lp_filter,
      mixed_layer_depth,
      movingaverage,
      plot,
      plot_section,
      plot_vars,
      press_check,
      rosette_summary,
      smooth,
      split,
  ]
  
  # Attach methods.
  Index.asof = asof
  
  Series.plot = plot
  Series.split = split
  Series.smooth = smooth
  Series.despike = despike
  Series.bindata = bindata
  Series.press_check = press_check
  
  DataFrame.split = split
  DataFrame.from_cnv = staticmethod(from_cnv)
  DataFrame.from_btl = staticmethod(from_btl)
  DataFrame.from_bl = staticmethod(from_bl)
  DataFrame.from_edf = staticmethod(from_edf)
  DataFrame.from_fsi = staticmethod(from_fsi)
  DataFrame.plot_vars = plot_vars
  DataFrame.press_check = press_check
  DataFrame.get_maxdepth = get_maxdepth
  DataFrame.plot_section = plot_section
  
subject: Remove space before operator