[issue20409] .readline() returned garble text

[Xiaoqing Rong]

New submission from Xiaoqing Rong:

I'm using Windows 8. I created file 'weird1.txt' (attached) from an Excel 
worksheet using save as Unicode Text (*.txt). And this happened when I used 
Python 3.3.3 (v3.3.3:c3896275c0f6, Nov 18 2013, 21:19:30) [MSC v.1600 64 bit 
(AMD64)] on win32:

 handle = open('weird1.txt'); handle.readline()
'ÿþ\x00P\x006\x004\x00;\x00Y\x00A\x00L\x000\x000\x001\x00C\x00;\x00T\x00F\x00C\x003\x00;\x00
 
\x00S\x00G\x00D\x00I\x00D\x00:\x00S\x000\x000\x000\x000\x000\x000\x000\x000\x001\x00,\x00
 \x00C\x00h\x00r\x00 \x00I\x00 \x00f\x00r\x00o\x00m\x00 
\x001\x005\x001\x000\x000\x006\x00-\x001\x004\x007\x005\x009\x004\x00,\x001\x005\x001\x001\x006\x006\x00-\x001\x005\x001\x000\x009\x007\x00,\x00
 \x00r\x00e\x00v\x00e\x00r\x00s\x00e\x00 
\x00c\x00o\x00m\x00p\x00l\x00e\x00m\x00e\x00n\x00t\x00,\x00 
\x00V\x00e\x00r\x00i\x00f\x00i\x00e\x00d\x00 \x00O\x00R\x00F\x00,\x00 
\x00\x00L\x00a\x00r\x00g\x00e\x00s\x00t\x00 \x00o\x00f\x00 \x00s\x00i\x00x\x00 
\x00s\x00u\x00b\x00u\x00n\x00i\x00t\x00s\x00 \x00o\x00f\x00 \x00t\x00h\x00e\x00 
\x00R\x00N\x00A\x00 \x00p\x00o\x00l\x00y\x00m\x00e\x00r\x00a\x00s\x00e\x00 
\x00I\x00I\x00I\x00 
\x00t\x00r\x00a\x00n\x00s\x00c\x00r\x00i\x00p\x00t\x00i\x00o\x00n\x00 
\x00i\x00n\x00i\x00t\x00i\x00a\x00t\x00i\x00o\x00n\x00 
\x00f\x00a\x00c\x00t\x00o\x00r\x00 \x00c\x00o\x00m\x00p\x00l\x00e\x00x\x00 
\x00(\x00T\x00F\x00I\x00I\x00I\x00C\x00)\x00;\x00 \x00p\x00a\x00r\x00t\x00 
\x00o\x00f\x00 \x00t\x00h\x00e\x00 \x00T\x00a\x00u\x00B\x00 
\x00d\x00o\x00m\x00a\x00i\x00n\x00 \x00o\x00f\x00 
\x00T\x00F\x00I\x00I\x00I\x00C\x00 \x00t\x00h\x00a\x00t\x00 
\x00b\x00i\x00n\x00d\x00s\x00 \x00D\x00N\x00A\x00 \x00a\x00t\x00 
\x00t\x00h\x00e\x00 \x00B\x00o\x00x\x00B\x00 
\x00p\x00r\x00o\x00m\x00o\x00t\x00e\x00r\x00 \x00s\x00i\x00t\x00e\x00s\x00 
\x00o\x00f\x00 \x00t\x00R\x00N\x00A\x00 \x00a\x00n\x00d\x00 
\x00s\x00i\x00m\x00i\x00l\x00a\x00r\x00 \x00g\x00e\x00n\x00e\x00s\x00;\x00 
\x00c\x00o\x00o\x00p\x00e\x00\n'

Then I opened 'weird1.txt' in Notepad++ 6.5.2, created file 'weird2.txt' by 
copying the whole content of 'weird1.txt' into a new file and saved it in 
Notepad++ 6.5.2 (I wanted to attach 'weird2.txt' but only one attachment is 
allowed), and this happened:

 handle = open('weird2.txt'); handle.readline()
'P64;YAL001C;TFC3; SGDID:S1, Chr I from 151006-147594,151166-151097, 
reverse complement, Verified ORF, Largest of six subunits of the RNA 
polymerase III transcription initiation factor complex (TFIIIC); part of the 
TauB domain of TFIIIC that binds DNA at the BoxB promoter sites of tRNA and 
similar genes; coope\n'

I can't see any difference between the contents of 'weird1.txt' and 
'weird2.txt' using Notepad++ or the Windows Notepad. Maybe some experts could 
tell me what's going on here?

--
components: IDLE
files: weird1.txt
messages: 209452
nosy: m123orning
priority: normal
severity: normal
status: open
title: .readline() returned garble text
type: behavior
versions: Python 3.3
Added file: http://bugs.python.org/file33750/weird1.txt

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[issue20135] mutate list

[Xiaoqing Rong]

New submission from Xiaoqing Rong:

I was using IDLE (Python GUI) for Python 3.3.3. I don't know if this is a bug 
or you guys intend it to be this way:

 x=[1,2]
 y=x
 y.append(3)
 x
[1, 2, 3]

personally i'd prefer x stays as [1,2] when i'm trying to mutate y

also:
 def f1(m,n=['haha']):
if m==n:
print('m==n')
else:
print('m!=n')
n.append('yaya')

 f1(['haha'])
m==n
 f1(['haha'])
m!=n

I'd prefer getting consistent results when calling functions like f1

--
messages: 207410
nosy: m123orning
priority: normal
severity: normal
status: open
title: mutate list
type: behavior
versions: Python 3.3

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