class_docstr: A line-based string reader.
  
      
class_docstr_tok: ["A","line-based","string","reader","."]
code: def peek(self, n=0):
      if self._l + n < len(self._str):
          return self[self._l + n]
      else:
          return ""
  
imports: import inspect
  import textwrap
  import re
  import pydoc
  from io import StringIO
  from warnings import warn
label_desc: Use image node_id 10 for calling the Reader obj's underlying member method code with example usage: obj.peek(n) and returns: self, str