parameters: (cls, filename, ad_rules_filename,
                          tracking_rules_filename)
return_statement: return LoadingReport(trace, ad_rules_filename, tracking_rules_filename)
docstring: Returns a LoadingReport from a trace filename.
docstring_summary: Returns a LoadingReport from a trace filename.
docstring_tokens: Returns a LoadingReport from a trace filename .
function: def FromTraceFilename(cls, filename, ad_rules_filename,
                          tracking_rules_filename):
      """Returns a LoadingReport from a trace filename."""
      trace = loading_trace.LoadingTrace.FromJsonFile(filename)
      return LoadingReport(trace, ad_rules_filename, tracking_rules_filename)
function_tokens: def FromTraceFilename ( cls , filename , ad_rules_filename , tracking_rules_filename ) : trace = loading_trace . LoadingTrace . FromJsonFile ( filename ) return LoadingReport ( trace , ad_rules_filename , tracking_rules_filename )