class_docstr: The Frequency range class.
  
  The elements of the range are central and bandwidth values, and optionally
  a unit (defaults to GHz). No clever unit conversion is done here, it's just
  used for checking that two ranges are comparable.
  
  This type is used for passive microwave sensors.
class_docstr_tok: ["The","Frequency","range","class",".","The","elements","of","the","range","are","central","and","bandwidth","values",",","and","optionally","a","unit","(","defaults","to","GHz",")",".","No","clever","unit","conversion","is","done","here",",","it","'s","just","used","for","checking","that","two","ranges","are","comparable",".","This","type","is","used","for","passive","microwave","sensors","."]
docstr: Format for print out.
docstr_tok: ["Format","for","print","out","."]
code: def __str__(self):
      """Format for print out."""
      return f"central={self.central} {self.unit} width={self.bandwidth} {self.unit}"
  
imports: import numbers
  from contextlib import suppress
  from typing import NamedTuple
  import numpy
label_desc: Use image node_id 2 for calling the FrequencyRange obj's underlying member method code with example usage: obj.__str__() and returns: str, self, str, self, str, self, str, self