[issue40354] problem when using yield

2020-04-21 Thread xie 

New submission from xie :

--version1：--
def func1():
a=0 
b=10
for i in range(4):
result = yield a+100 if b>100 else (yield a)
print(result)

f1 = func1()
print("value:%s" % next(f1))
print("--")
print("value:%s" % next(f1))
print("--")

--version2--

def func1():
a=0 
b=10
for i in range(4):
result = (yield a+100) if b>100 else (yield a)
print(result)

f1 = func1()
print("value:%s" % next(f1))
print("--")
print("value:%s" % next(f1))
print("--")


--problem
I think two version should behave same,but it did not.Do this will be treated 
as a bug ?

--
messages: 366931
nosy: xsmyqf
priority: normal
severity: normal
status: open
title: problem when using yield
type: behavior
versions: Python 3.7

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[issue40354] problem when using yield

2020-04-21 Thread xie 


xie  added the comment:

Okay,I agree with you.I did not get the priority.

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stage:  -> resolved
status: open -> closed

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[issue40475] json.JSONEncoder override default method

2020-05-01 Thread xie 

New submission from xie :

I see an example from here：https://docs.python.org/3/library/json.html
--It is about custom method from python object to json string:-

import json
class ComplexEncoder(json.JSONEncoder):
def default(self, obj):
print("hi")
if isinstance(obj, complex):
return [obj.real, obj.imag]
# Let the base class default method raise the TypeError
return json.JSONEncoder.default(self, obj)

s2=json.dumps(2 + 1j, cls=ComplexEncoder)
print(s2)

---I wrote an program like it,but not the result I want:---
class MyEncoder(json.JSONEncoder):
def default(self,obj):
print("hi")
if isinstance(obj,dict):
print("it is dict!")
return obj["name"]
return json.JSONEncoder.default(self,obj)

print(MyEncoder().encode({"name":"sun","age":40}))
jsonStr=json.dumps({"name":"wang","age":30},cls=MyEncoder)
print(jsonStr)

the result of the program is:-
{"name": "sun", "age": 40}
{"name": "wang", "age": 30}

I think it should be:-
sun
wang

what I missed?I am very confused.

--
messages: 367912
nosy: xsmyqf
priority: normal
severity: normal
status: open
title: json.JSONEncoder override default method
type: behavior
versions: Python 3.7

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[issue40475] json.JSONEncoder override default method

2020-05-01 Thread xie 


xie  added the comment:

I got it,Thank you!

--
resolution:  -> fixed
stage:  -> resolved
status: open -> closed

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[issue2206] critical memory leak in hashlib.md5

2008-02-28 Thread Xie Bengui 

Changes by Xie Bengui:


--
files: md5.txt
nosy: agateriver
severity: normal
status: open
title: critical memory leak in hashlib.md5
type: resource usage
versions: Python 2.6
Added file: http://bugs.python.org/file9569/md5.txt

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[issue2206] critical memory leak in hashlib.md5

2008-02-28 Thread Xie Bengui 

New submission from Xie Bengui:

I write a pieces of code below to find my lost password:

import hashlib

for i in range(,):
m=hashlib.md5(str(i)).hexdigest()
if m=="21e83200cfd4845fd5e07ee151d70caf":
print "password is: ", i
break


when I run it serval minutes, all memory use up.

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[issue2206] critical memory leak in hashlib.md5

2008-02-28 Thread Xie Bengui 

Changes by Xie Bengui:


--
nosy:  -agateriver

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[issue2206] critical memory leak in hashlib.md5

2008-02-28 Thread Xie Bengui 

Xie Bengui added the comment:

I am sorry for submitting this fake issue!

Thank Benjamin Peterson!

--
nosy: +agateriver

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[issue38575] Child process deadlock in subprocess.Popen

2019-10-24 Thread Zhipeng Xie 


New submission from Zhipeng Xie <775350...@qq.com>:

Hi, we had a child process deadlock on _disabling_gc_lock in subprocess.Popen. 
It seems that after 
https://github.com/python/cpython/commit/5e8e371364ee58dadb9a4e4e51c7e9cf6bedbfae,
 subprocess.Popen no longer support to be called in preexec_fn.

Steps to reproduce:
[root@localhost ~]# python2 --version
Python 2.7.15
[root@localhost ~]# python2 mtfork.py 

wait for a while and the child process deadlock

Here is the gdb stack:

(gdb) py-bt
Traceback (most recent call first):
  Waiting for the GIL
  File "/usr/local/lib/python2.7/subprocess.py", line 931, in _execute_child
with self._disabling_gc_lock:
  File "/usr/local/lib/python2.7/subprocess.py", line 394, in __init__
errread, errwrite)
  File "mtfork.py", line 36, in run_cmd
stderr=subprocess.PIPE)
  File "/usr/local/lib/python2.7/subprocess.py", line 989, in _execute_child
preexec_fn()
  File "/usr/local/lib/python2.7/subprocess.py", line 394, in __init__
errread, errwrite)
  File "mtfork.py", line 15, in run_command
stdout=arg_stdout, stderr=arg_stderr, shell=True)
  File "mtfork.py", line 51, in _readerthread3
status = run_command("/root/exe",preexec_fn=preexec_fn_no_args)
  File "/usr/local/lib/python2.7/threading.py", line 754, in run
self.__target(*self.__args, **self.__kwargs)
  File "/usr/local/lib/python2.7/threading.py", line 801, in __bootstrap_inner
self.run()
  File "/usr/local/lib/python2.7/threading.py", line 774, in __bootstrap
self.__bootstrap_inner()
(gdb) py-list
 926# The first char specifies the exception type: 0 means
 927# OSError, 1 means some other error.
 928errpipe_read, errpipe_write = self.pipe_cloexec()
 929try:
 930try:
>931with self._disabling_gc_lock:
 932gc_was_enabled = gc.isenabled()
 933# Disable gc to avoid bug where gc -> 
file_dealloc ->
 934# write to stderr -> hang.
 935# https://bugs.python.org/issue1336
 936    gc.disable()

--
components: Library (Lib)
files: mtfork.py
messages: 355290
nosy: Zhipeng Xie
priority: normal
severity: normal
status: open
title: Child process deadlock in subprocess.Popen
type: behavior
versions: Python 2.7
Added file: https://bugs.python.org/file48675/mtfork.py

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[issue37788] fix for bpo-36402 (threading._shutdown() race condition) causes reference leak

2021-03-29 Thread Zhipeng Xie 


Zhipeng Xie <775350...@qq.com> added the comment:

ping

I also encountered this problem. Is there a fix now?

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[issue39146] too much memory consumption in re.compile unicode

2019-12-28 Thread Zhipeng Xie 


Change by Zhipeng Xie <775350...@qq.com>:


--
title: to much memory consumption in re.compile unicode -> too much memory 
consumption in re.compile unicode

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[issue39146] to much memory consumption in re.compile unicode

2019-12-28 Thread Zhipeng Xie 


New submission from Zhipeng Xie <775350...@qq.com>:

when running the following script, we found python2 comsume a lot memory while 
python3 does not have the issue.

import re
import time
NON_PRINTABLE = re.compile(u'[^\U0001-\U0010]')
time.sleep( 30 )

python2:
  PID USER  PR  NIVIRTRESSHR S  %CPU  %MEM TIME+ COMMAND

 6943 root  20   0  109956  93436   3956 S   0.0   1.2   0:00.30 python

python3:
  PID USER  PR  NIVIRTRESSHR S  %CPU  %MEM TIME+ COMMAND

 6952 root  20   0   28032   8880   4868 S   0.0   0.1   0:00.02 python3

--
components: Library (Lib)
messages: 358936
nosy: Zhipeng Xie
priority: normal
severity: normal
status: open
title: to much memory consumption in re.compile unicode
type: resource usage
versions: Python 2.7

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[issue39146] too much memory consumption in re.compile unicode

2019-12-30 Thread Zhipeng Xie 


Zhipeng Xie <775350...@qq.com> added the comment:

Hi, I tracked it down and found that this problem was introduced in python2.7.9 
by following commit:

https://hg.python.org/cpython/rev/ebd48b4f650d

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nosy: +serhiy.storchaka

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[issue39146] too much memory consumption in re.compile unicode

2019-12-31 Thread Zhipeng Xie 


Zhipeng Xie <775350...@qq.com> added the comment:

> but range() was here before ebd48b4f650d.

before ebd48b4f650d, _optimize_unicode use xrange. So python2.7.8 is ok and 
python2.7.9 consume much memory in my test case.

> Obviously there are other causes of the difference between 2.7 and 3.x.

Maybe it is because my python was compiled with --enable-unicode=ucs4.

--

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[issue43163] code.interact() unexpected raises exception when there may be more code

2021-02-08 Thread Xie Jingyi 


Change by Xie Jingyi :


--
nosy: hsfzxjy
priority: normal
severity: normal
status: open
title: code.interact() unexpected raises exception when there may be more code
type: behavior
versions: Python 3.10

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[issue43163] code.interact() unexpected raises exception when there may be more code

2021-02-08 Thread Xie Jingyi 


New submission from Xie Jingyi :

In Python3.10.0a5, `code.interact()` will raise unexpected SyntaxError even if 
there should be more code.

```
Python 3.10.0a5 (default, Feb  7 2021, 20:14:10) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import code
>>> code.interact()
Python 3.10.0a5 (default, Feb  7 2021, 20:14:10) 
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
(InteractiveConsole)
>>> print([1,
... 2,
  File "", line 1
print([1,
  ^
SyntaxError: '[' was never closed
>>> 
```

Similar things also happen in IDLE.

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[issue43163] code.interact() unexpected raises exception when there may be more code

2021-02-08 Thread Xie Jingyi 


Change by Xie Jingyi :


--
assignee:  -> terry.reedy
components: +IDLE, Library (Lib)
nosy: +terry.reedy

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[issue43163] code.interact() unexpectedly raises exception when there may be more code

2021-02-08 Thread Xie Jingyi 


Change by Xie Jingyi :


--
title: code.interact() unexpected raises exception when there may be more code 
-> code.interact() unexpectedly raises exception when there may be more code

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[issue37297] function changed when pickle bound method object

2019-06-15 Thread George Xie 


New submission from George Xie :

if we create a bound method object `f` with function object `A.f` and instance 
object `B()`,
when pickling this bound method object:

import pickle

class A():
def f(self):
pass

class B():
def f(self):
pass

o = B()
f = A.f.__get__(o)
pf = pickle.loads(pickle.dumps(f))
print(f)
print(pf)

we get:

>
>

the underlaying function are lost, changed from `A.f` to `B.f`.

as pickle calls `__reduce__` method of `method object`, IMO [its 
implementation][1] simply ignored the real function, whcih is not right.

I have tried a [wordaround][2]:

import types
import copyreg

def my_reduce(obj):
return (obj.__func__.__get__, (obj.__self__,))

copyreg.pickle(types.MethodType, my_reduce)


[1]: https://github.com/python/cpython/blob/v3.7.3/Objects/classobject.c#L75-L89
[2]: https://stackoverflow.com/a/56614748/4201810

--
components: Library (Lib)
messages: 345721
nosy: georgexsh
priority: normal
severity: normal
status: open
title: function changed when pickle bound method object
type: behavior
versions: Python 3.7

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[issue37297] function changed when pickle bound method object

2019-06-16 Thread George Xie 


Change by George Xie :


--
keywords: +patch
Added file: 
https://bugs.python.org/file48424/0001-fix-bound-method-__reduce__-bug.patch

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