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change DumbWriter to derive from NullWriter

This commit is contained in:
Guido van Rossum 1996-05-29 00:02:30 +00:00
parent 3fd32ecd92
commit 3672aa2dcd
1 changed files with 4 additions and 3 deletions
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7
Lib/formatter.py
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@ -262,6 +262,7 @@ class AbstractFormatter:
class NullWriter:
"""Minimal writer interface to use in testing.
"""
def __init__(self): pass
def new_alignment(self, align): pass
def new_font(self, font): pass
def new_margin(self, margin, level): pass
@ -275,7 +276,7 @@ class NullWriter:
def send_literal_data(self, data): pass
class AbstractWriter:
class AbstractWriter(NullWriter):
def __init__(self):
pass
@ -314,12 +315,12 @@ class AbstractWriter:
print "send_literal_data(%s)" % `data`
class DumbWriter(AbstractWriter):
class DumbWriter(NullWriter):
def __init__(self, file=None, maxcol=72):
self.file = file or sys.stdout
self.maxcol = maxcol
AbstractWriter.__init__(self)
NullWriter.__init__(self)
self.reset()
def reset(self):