class_docstr: Python interface commandline parser
  
  The `OrionCmdlineParser` is used as a way to obtain the parsing process of Orion
  through a Python interface. It provides different dictionaries containing information
  for different parts of the parsing process. It also exposes methods to retrieve the
  command line with formatted values for parameters.
  
  Parameters
  ----------
  config_prefix : str, optional
      Prefix for the configuration file used by the parser to identify it.
  allow_non_existing_files : bool, optional
      If True, will parse all commandline but ignore non existing user script or configuration
      files if non-existent. Default is False
  
  Attributes
  ----------
  parser : CmdlineParser
      Parser that will be used to parse the commandline.
  cmd_priors : OrderedDict
      An OrderedDict containing only the priors inside the commandline.
  file_priors : OrderedDict
      An OrderedDict obtained by parsing the config file, if one was found.
  priors : OrderedDict
      An OrderedDict obtained from merging `cmd_priors` and `file_priors`.
  user_script : str
      File path of the script executed (inferred from parsed commandline)
  config_prefix : str
      Prefix for the configuration file used by the parser to identify it.
  file_config_path : str
      If a config file was found, this file contain the path. `None` otherwise.
  converter : BaseConverter
      A BaseConverter object to parse the config file.
  
  Methods
  -------
  parse(commandline)
      Parses the commandline and populate the OrderedDict
  format(trial, experiment) : str
      Return the commandline with replaced values for priors and attributes
docstr: Extract the prior from a string
  
  This is used alongside `_extract_list` and `_extract_dict` to iterate through
  a config file and extract the prior corresponding to a string.
  
  Parameters
  ----------
  current_depth: string
      String corresponding to the namespace at the current depth.
  value: string
      Value from which to extract a prior.
docstr_tok: ["Extract","the","prior","from","a","string","This","is","used","alongside","`","_extract_list","`","and","`","_extract_dict","`","to","iterate","through","a","config","file","and","extract","the","prior","corresponding","to","a","string",".","Parameters","--","--","--","--","--","current_depth",":","string","String","corresponding","to","the","namespace","at","the","current","depth",".","value",":","string","Value","from","which","to","extract","a","prior","."]
code: def _extract_file_string(self, current_depth, value):
      """Extract the prior from a string
  
      This is used alongside `_extract_list` and `_extract_dict` to iterate through
      a config file and extract the prior corresponding to a string.
  
      Parameters
      ----------
      current_depth: string
          String corresponding to the namespace at the current depth.
      value: string
          Value from which to extract a prior.
  
      """
      substrings = value.split("~")
  
      if len(substrings) == 1:
          return
  
      self._extract_prior(current_depth, value, self.file_priors)
  
imports: import copy
  import errno
  import logging
  import os
  import re
  import shutil
  from collections import OrderedDict, defaultdict
  from orion.core.io.cmdline_parser import CmdlineParser
  from orion.core.io.convert import infer_converter_from_file_type
  from orion.core.utils.flatten import flatten
label_desc: Use image node_id 13 for calling the OrionCmdlineParser obj's underlying member method code with example usage: obj._extract_file_string(current_depth, value) without return types