docstr: Returns the number of '$' characters right in front of s[i].
docstr_tok: ["Returns","the","number","of","'","$","'","characters","right","in","front","of","s","[","i","]","."]
code: def _count_dollars_before_index(self, s, i):
      """Returns the number of '$' characters right in front of s[i]."""
      dollar_count = 0
      dollar_index = i - 1
      while dollar_index > 0 and s[dollar_index] == "$":
          dollar_count += 1
          dollar_index -= 1
      return dollar_count
  
imports: import re
  import textwrap
label_desc: Use image node_id 11 for calling the Writer obj's underlying member method code with example usage: obj._count_dollars_before_index(s, i) and returns: dollar_count