class_docstr: The minimal interface for a converter to take custom data types (or
  sequences) and convert them to values Matplotlib can use.
class_docstr_tok: ["The","minimal","interface","for","a","converter","to","take","custom","data","types","(","or","sequences",")","and","convert","them","to","values","Matplotlib","can","use","."]
docstr: Return the default unit for *x* or ``None`` for the given axis.
docstr_tok: ["Return","the","default","unit","for","*","x","*","or","``","None","``","for","the","given","axis","."]
code: def default_units(x, axis):
      """Return the default unit for *x* or ``None`` for the given axis."""
      return None
  
file_path: matplotlib/lib/matplotlib/units.py
imports: from decimal import Decimal
  from numbers import Number
  import numpy
  from numpy import ma
  from matplotlib import cbook
label_desc: Use image node_id 2 for calling the ConversionInterface obj's underlying member method code with example usage: obj.default_units(x, axis) and returns: None