| 14 | |
| 15 | |
| 16 | class _Tracer(object): |
| 17 | def __init__(self): |
| 18 | self.stream = StringIO() |
| 19 | self._in_print = False |
| 20 | self.accept_frame = None # Can be set to a callable |
| 21 | self.lines_executed = set() |
| 22 | |
| 23 | def tracer_printer(self, frame, event, arg): |
| 24 | if self._in_print: |
| 25 | return None |
| 26 | self._in_print = True |
| 27 | try: |
| 28 | if self.accept_frame is None or self.accept_frame(frame): |
| 29 | if arg is not None: |
| 30 | if event == "exception": |
| 31 | arg = arg[0].__name__ |
| 32 | elif arg is not None: |
| 33 | arg = str(arg) |
| 34 | if arg is None: |
| 35 | arg = "" |
| 36 | |
| 37 | self.lines_executed.add(frame.f_lineno) |
| 38 | |
| 39 | s = " ".join( |
| 40 | ( |
| 41 | str(frame.f_lineno), |
| 42 | frame.f_code.co_name, |
| 43 | os.path.basename(frame.f_code.co_filename), |
| 44 | event.upper() if event != "line" else event, |
| 45 | arg, |
| 46 | ) |
| 47 | ) |
| 48 | self.writeln(s) |
| 49 | except: |
| 50 | traceback.print_exc() |
| 51 | self._in_print = False |
| 52 | return self.tracer_printer |
| 53 | |
| 54 | def writeln(self, s): |
| 55 | self.write(s) |
| 56 | self.write("\n") |
| 57 | |
| 58 | def write(self, s): |
| 59 | if isinstance(s, bytes): |
| 60 | s = s.decode("utf-8") |
| 61 | self.stream.write(s) |
| 62 | |
| 63 | def call(self, c): |
| 64 | sys.settrace(self.tracer_printer) |
| 65 | c() |
| 66 | sys.settrace(None) |
| 67 | return self.stream.getvalue() |
| 68 | |
| 69 | |
| 70 | def check( |