code: def choose_scalar_style(self):
      if self.analysis is None:
          self.analysis = self.analyze_scalar(self.event.value)
      if self.event.style == '"' or self.canonical:
          return '"'
      if not self.event.style and self.event.implicit[0]:
          if not (
              self.simple_key_context
              and (self.analysis.empty or self.analysis.multiline)
          ) and (
              self.flow_level
              and self.analysis.allow_flow_plain
              or (
                  not self.flow_level
                  and self.analysis.allow_block_plain
              )
          ):
              return ""
      if self.event.style and self.event.style in "|>":
          if (
              not self.flow_level
              and not self.simple_key_context
              and self.analysis.allow_block
          ):
              return self.event.style
      if not self.event.style or self.event.style == "'":
          if self.analysis.allow_single_quoted and not (
              self.simple_key_context and self.analysis.multiline
          ):
              return "'"
      return '"'
  
imports: from .error import YAMLError
  from .events import *
label_desc: Use image node_id 38 for calling the Emitter obj's underlying member method code with example usage: obj.choose_scalar_style() and returns: str, str, str, self, str