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bpo-32837: IDLE - require encoding argument for textview.view_file. #5646

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Feb 12, 2018
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bpo-32837: IDLE - require encoding argument for textview.view_file. #5646

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bpo-32837: IDLE - require encoding argument for textview.view_file.
terryjreedy Feb 12, 2018
5809993
blurb
terryjreedy Feb 12, 2018
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7 changes: 4 additions & 3 deletions Lib/idlelib/idle_test/test_textview.py
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Original file line number Diff line number Diff line change
Expand Up @@ -112,7 +112,7 @@ def test_view_text(self):
view.ok()

def test_view_file(self):
view = tv.view_file(root, 'Title', __file__, modal=False)
view = tv.view_file(root, 'Title', __file__, 'ascii', modal=False)
self.assertIsInstance(view, tv.ViewWindow)
self.assertIsInstance(view.viewframe, tv.ViewFrame)
get = view.viewframe.textframe.text.get
Expand All @@ -121,7 +121,7 @@ def test_view_file(self):

def test_bad_file(self):
# Mock showerror will be used; view_file will return None.
view = tv.view_file(root, 'Title', 'abc.xyz', modal=False)
view = tv.view_file(root, 'Title', 'abc.xyz', 'ascii', modal=False)
self.assertIsNone(view)
self.assertEqual(tv.showerror.title, 'File Load Error')

Expand Down Expand Up @@ -161,7 +161,8 @@ def _command():
def test_view_file_bind_with_button(self):
def _command():
self.called = True
self.view = tv.view_file(root, 'TITLE_FILE', __file__, _utest=True)
self.view = tv.view_file(root, 'TITLE_FILE', __file__,
encoding='ascii', _utest=True)
button = Button(root, text='BUTTON', command=_command)
button.invoke()
self.addCleanup(button.destroy)
Expand Down
2 changes: 1 addition & 1 deletion Lib/idlelib/textview.py
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Original file line number Diff line number Diff line change
Expand Up @@ -107,7 +107,7 @@ def view_text(parent, title, text, modal=True, _utest=False):
return ViewWindow(parent, title, text, modal, _utest=_utest)


def view_file(parent, title, filename, encoding=None, modal=True, _utest=False):
def view_file(parent, title, filename, encoding, modal=True, _utest=False):
"""Create text viewer for text in filename.

Return error message if file cannot be read. Otherwise calls view_text
Expand Down
2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/IDLE/2018-02-12-17-22-48.bpo-32837.-33QPl.rst
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@@ -0,0 +1,2 @@
Using the system and place-dependent default encoding for open() is a bad
idea for IDLE's system and location-independent files.