remove un-necessary constant

Author: picnixz

Lib/dis.py

@@ -4,6 +4,7 @@
 import types
 import collections
 import io
+from fileinput import lineno
 
 from opcode import *
 from opcode import (
@@ -436,6 +437,8 @@ def __init__(self, file=None, lineno_width=0, offset_width=0, positions_width=0,
         *positions_width* sets the width of the instruction positions field (0 omits it)
         *label_width* sets the width of the label field
         *show_caches* is a boolean indicating whether to display cache lines
+
+        If *positions_width* is specified, *lineno_width* is ignored.
         """
         self.file = file
         self.lineno_width = lineno_width
@@ -465,26 +468,28 @@ def print_instruction(self, instr, mark_as_current=False):
     def print_instruction_line(self, instr, mark_as_current):
         """Format instruction details for inclusion in disassembly output."""
         lineno_width = self.lineno_width
-        positions_wdith = self.positions_width
+        positions_width = self.positions_width
         offset_width = self.offset_width
         label_width = self.label_width
 
-        new_source_line = (lineno_width > 0 and
+        new_source_line = ((lineno_width > 0 or positions_width > 0) and
                            instr.starts_line and
                            instr.offset > 0)
         if new_source_line:
             print(file=self.file)
 
         fields = []
         # Column: Source code line number
-        if lineno_width or positions_wdith:
-            if positions_wdith:
+        if lineno_width or positions_width:
+            if positions_width:
+                # reporting positions instead of just line numbers
+                assert lineno_width > 0
                 if instr_positions := instr.positions:
                     ps = tuple('?' if p is None else p for p in instr_positions)
                     positions_str = "%s:%s-%s:%s" % ps
-                    fields.append(f'{positions_str:{positions_wdith}}')
+                    fields.append(f'{positions_str:{positions_width}}')
                 else:
-                    fields.append(' ' * positions_wdith)
+                    fields.append(' ' * positions_width)
             else:
                 if instr.starts_line:
                     lineno_fmt = "%%%dd" if instr.line_number is not None else "%%%ds"
@@ -831,7 +836,6 @@ def _make_labels_map(original_code, exception_entries=()):
     return labels_map
 
 _NO_LINENO =    '  --'
-_NO_POSITION =  '  ?:?-?:?'
 
 def _get_lineno_width(linestarts):
     if linestarts is None: