class_docstr: Custom error raised when a required env var is missing.
class_docstr_tok: ["Custom","error","raised","when","a","required","env","var","is","missing","."]
code: def __init__(self, key):
      msg = "Required env var '{}' is missing.".format(key)
      super(RequiredSettingMissingError, self).__init__(msg)
  
imports: import decimal
  import json
  import os
  from dateutil import parser
label_desc: Use image node_id 1 to create a new RequiredSettingMissingError object from inherited base classes: Exception with example: obj = RequiredSettingMissingError(key)