Guido van Rossum | 5c97167 | 1996-07-22 15:23:25 +0000 | [diff] [blame] | 1 | # Format and print Python stack traces |
| 2 | |
| 3 | import linecache |
| 4 | import string |
| 5 | import sys |
| 6 | import types |
| 7 | |
| 8 | def _print(file, str='', terminator='\n'): |
| 9 | file.write(str+terminator) |
Guido van Rossum | a8763e5 | 1996-08-26 18:33:32 +0000 | [diff] [blame] | 10 | |
| 11 | |
| 12 | def print_list(extracted_list, file=None): |
| 13 | if not file: |
| 14 | file = sys.stderr |
| 15 | for filename, lineno, name, line in extracted_list: |
| 16 | _print(file, |
| 17 | ' File "%s", line %d, in %s' % (filename,lineno,name)) |
| 18 | if line: |
| 19 | _print(file, ' %s' % string.strip(line)) |
| 20 | |
| 21 | def format_list(extracted_list): |
| 22 | list = [] |
| 23 | for filename, lineno, name, line in extracted_list: |
| 24 | item = ' File "%s", line %d, in %s\n' % (filename,lineno,name) |
| 25 | if line: |
| 26 | item = item + ' %s\n' % string.strip(line) |
| 27 | list.append(item) |
| 28 | return list |
Guido van Rossum | 5c97167 | 1996-07-22 15:23:25 +0000 | [diff] [blame] | 29 | |
| 30 | |
| 31 | def print_tb(tb, limit=None, file=None): |
| 32 | if not file: |
| 33 | file = sys.stderr |
| 34 | if limit is None: |
| 35 | if hasattr(sys, 'tracebacklimit'): |
| 36 | limit = sys.tracebacklimit |
| 37 | n = 0 |
| 38 | while tb is not None and (limit is None or n < limit): |
| 39 | f = tb.tb_frame |
| 40 | lineno = tb.tb_lineno |
| 41 | co = f.f_code |
| 42 | filename = co.co_filename |
| 43 | name = co.co_name |
| 44 | _print(file, |
| 45 | ' File "%s", line %d, in %s' % (filename,lineno,name)) |
| 46 | line = linecache.getline(filename, lineno) |
| 47 | if line: _print(file, ' ' + string.strip(line)) |
| 48 | tb = tb.tb_next |
| 49 | n = n+1 |
| 50 | |
| 51 | def format_tb(tb, limit = None): |
Guido van Rossum | a8763e5 | 1996-08-26 18:33:32 +0000 | [diff] [blame] | 52 | return format_list(extract_tb(tb, limit)) |
Guido van Rossum | 5c97167 | 1996-07-22 15:23:25 +0000 | [diff] [blame] | 53 | |
| 54 | def extract_tb(tb, limit = None): |
| 55 | if limit is None: |
| 56 | if hasattr(sys, 'tracebacklimit'): |
| 57 | limit = sys.tracebacklimit |
| 58 | list = [] |
| 59 | n = 0 |
| 60 | while tb is not None and (limit is None or n < limit): |
| 61 | f = tb.tb_frame |
| 62 | lineno = tb.tb_lineno |
| 63 | co = f.f_code |
| 64 | filename = co.co_filename |
| 65 | name = co.co_name |
| 66 | line = linecache.getline(filename, lineno) |
| 67 | if line: line = string.strip(line) |
| 68 | else: line = None |
Guido van Rossum | b8cc6ae | 1996-10-08 14:13:43 +0000 | [diff] [blame] | 69 | list.append((filename, lineno, name, line)) |
Guido van Rossum | 5c97167 | 1996-07-22 15:23:25 +0000 | [diff] [blame] | 70 | tb = tb.tb_next |
| 71 | n = n+1 |
| 72 | return list |
| 73 | |
| 74 | |
| 75 | def print_exception(etype, value, tb, limit=None, file=None): |
| 76 | if not file: |
| 77 | file = sys.stderr |
| 78 | if tb: |
| 79 | _print(file, 'Traceback (innermost last):') |
| 80 | print_tb(tb, limit, file) |
| 81 | lines = format_exception_only(etype, value) |
| 82 | for line in lines[:-1]: |
| 83 | _print(file, line, ' ') |
| 84 | _print(file, lines[-1], '') |
| 85 | |
| 86 | def format_exception(etype, value, tb, limit = None): |
| 87 | if tb: |
| 88 | list = ['Traceback (innermost last):\n'] |
| 89 | list = list + format_tb(tb, limit) |
| 90 | list = list + format_exception_only(etype, value) |
| 91 | return list |
| 92 | |
| 93 | def format_exception_only(etype, value): |
| 94 | list = [] |
| 95 | if type(etype) == types.ClassType: |
| 96 | stype = etype.__name__ |
| 97 | else: |
| 98 | stype = etype |
| 99 | if value is None: |
| 100 | list.append(str(stype) + '\n') |
| 101 | else: |
| 102 | if etype is SyntaxError: |
| 103 | try: |
| 104 | msg, (filename, lineno, offset, line) = value |
| 105 | except: |
| 106 | pass |
| 107 | else: |
| 108 | if not filename: filename = "<string>" |
| 109 | list.append(' File "%s", line %d\n' % |
| 110 | (filename, lineno)) |
| 111 | i = 0 |
| 112 | while i < len(line) and \ |
| 113 | line[i] in string.whitespace: |
| 114 | i = i+1 |
| 115 | list.append(' %s\n' % string.strip(line)) |
| 116 | s = ' ' |
| 117 | for c in line[i:offset-1]: |
| 118 | if c in string.whitespace: |
| 119 | s = s + c |
| 120 | else: |
| 121 | s = s + ' ' |
| 122 | list.append('%s^\n' % s) |
| 123 | value = msg |
| 124 | list.append('%s: %s\n' % (str(stype), str(value))) |
| 125 | return list |
| 126 | |
| 127 | |
| 128 | def print_exc(limit=None, file=None): |
| 129 | if not file: |
| 130 | file = sys.stderr |
| 131 | print_exception(sys.exc_type, sys.exc_value, sys.exc_traceback, |
| 132 | limit, file) |
| 133 | |
| 134 | def print_last(limit=None, file=None): |
| 135 | if not file: |
| 136 | file = sys.stderr |
| 137 | print_exception(sys.last_type, sys.last_value, sys.last_traceback, |
| 138 | limit, file) |
Guido van Rossum | a8763e5 | 1996-08-26 18:33:32 +0000 | [diff] [blame] | 139 | |
| 140 | |
| 141 | def print_stack(f=None, limit=None, file=None): |
| 142 | if f is None: |
| 143 | try: |
| 144 | raise ZeroDivisionError |
| 145 | except ZeroDivisionError: |
| 146 | tb = sys.exc_traceback |
| 147 | f = tb.tb_frame.f_back |
| 148 | print_list(extract_stack(f, limit), file) |
| 149 | |
| 150 | def format_stack(f=None, limit=None): |
| 151 | if f is None: |
| 152 | try: |
| 153 | raise ZeroDivisionError |
| 154 | except ZeroDivisionError: |
| 155 | tb = sys.exc_traceback |
| 156 | f = tb.tb_frame.f_back |
| 157 | return format_list(extract_stack(t, limit)) |
| 158 | |
| 159 | def extract_stack(f=None, limit = None): |
| 160 | if f is None: |
| 161 | try: |
| 162 | raise ZeroDivisionError |
| 163 | except ZeroDivisionError: |
| 164 | tb = sys.exc_traceback |
| 165 | f = tb.tb_frame.f_back |
| 166 | if limit is None: |
| 167 | if hasattr(sys, 'tracebacklimit'): |
| 168 | limit = sys.tracebacklimit |
| 169 | list = [] |
| 170 | n = 0 |
| 171 | while f is not None and (limit is None or n < limit): |
| 172 | lineno = f.f_lineno |
| 173 | co = f.f_code |
| 174 | filename = co.co_filename |
| 175 | name = co.co_name |
| 176 | line = linecache.getline(filename, lineno) |
| 177 | if line: line = string.strip(line) |
| 178 | else: line = None |
Guido van Rossum | b8cc6ae | 1996-10-08 14:13:43 +0000 | [diff] [blame] | 179 | list.append((filename, lineno, name, line)) |
Guido van Rossum | a8763e5 | 1996-08-26 18:33:32 +0000 | [diff] [blame] | 180 | f = f.f_back |
| 181 | n = n+1 |
| 182 | list.reverse() |
| 183 | return list |