[Tutor] why "ifconfig" is alway running?
my script is
#!/usr/bin/env python
import datetime
import subprocess
import sys
import os
import signal
from time import sleep
def runForAWhile(cmd, secs=10):
print("running %s" % cmd)
timeout = datetime.timedelta(seconds=secs)
print timeout
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT, shell=True)
status = proc.poll()
start = datetime.datetime.now()
while (status is None and (datetime.datetime.now() - start) <
timeout): #not timed out
#print proc.stdout.readline() #TODO timestamp?
print status
#print datetime.datetime.now() - start
if 0 == status:
print("'%s' is program exited" %cmd)
else:
try:
os.kill(proc.pid, signal.SIGINT)
print "Process timeout: '%s'" % cmd
except OSError:
pass
cmd="ifconfig"
runForAWhile(cmd,10)
why it print many "None" in 10 second. which means "ifconfig" is
running in 10sec, why, what's wrong withi my script,
I just want to let my programe running, if it's timeout(10sec), kill it
Lei
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Re: [Tutor] why "ifconfig" is alway running?
#!/usr/bin/env python
import datetime
import subprocess
import sys
import os
import signal
from time import sleep
def runForAWhile(cmd, secs=10):
print("running %s" % cmd)
timeout = datetime.timedelta(seconds=secs)
print timeout
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT, shell=True)
status = proc.poll()
start = datetime.datetime.now()
while (status is None and (datetime.datetime.now() - start) <
timeout): #not timed out
print proc.stdout.readline() #TODO timestamp?
#print status
#print datetime.datetime.now() - start
if 0 == status:
print("'%s' is program exited" %cmd)
else:
try:
os.kill(proc.pid, signal.SIGINT)
print "Process timeout: '%s'" % cmd
except OSError:
pass
cmd="ping 128.224.165.20 -c 4"
runForAWhile(cmd,30)
I see that "status" always "!=0“ why program is NOT exited
Lei
On Sun, Dec 19, 2010 at 1:15 AM, Alan Gauld wrote:
>
> "lei yang" wrote
>
>> def runForAWhile(cmd, secs=10):
>> proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
>>
>> stderr=subprocess.STDOUT, shell=True)
>> status = proc.poll()
>> start = datetime.datetime.now()
>> while (status is None and
>
> (datetime.datetime.now() - start) < timeout): #not timed out
>>
>> print status
>> if 0 == status:
>> print("'%s' is program exited" %cmd)
>> else:
>> try:
>> os.kill(proc.pid, signal.SIGINT)
>
>> why it print many "None" in 10 second. which means "ifconfig" is
>> running in 10sec, why, what's wrong withi my script,
>
> You only check the status once *before* entering the while loop.
> You need another status check inside the loop.
>
>> I just want to let my programe running, if it's timeout(10sec), kill it
>
> Its not clear from your mail if you have checked whether the
> process really is running - using the OS commands 'top' or 'ps'
> for example or whjether its just the None result you are concerned
> about. But try updating status first...
>
> HTH,
>
>
> --
> Alan Gauld
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
>
>
> ___
> Tutor maillist - tu...@python.org
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Re: [Tutor] why "ifconfig" is alway running?
On Sun, Dec 19, 2010 at 4:57 PM, Alan Gauld wrote:
>
> "lei yang" wrote
>
>
> def runForAWhile(cmd, secs=10):
> print("running %s" % cmd)
> timeout = datetime.timedelta(seconds=secs)
> print timeout
> proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
> stderr=subprocess.STDOUT, shell=True)
> status = proc.poll()
>
> You are still only checking status once outside the while loop.
>
Thanks, I make a stupid mistaking
Lei
> start = datetime.datetime.now()
> while (status is None and (datetime.datetime.now() - start) <
> timeout): #not timed out
> print proc.stdout.readline() #TODO timestamp?
> #print status
> #print datetime.datetime.now() - start
>
>
>> I see that "status" always "!=0“ why program is NOT exited
>
>
> --
> Alan Gauld
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
>
>
> ___
> Tutor maillist - tu...@python.org
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Re: [Tutor] why "ifconfig" is alway running?
#!/usr/bin/env python
import datetime
import subprocess
import sys
import os
import signal
from time import sleep
def host_run(cmd, secs=10):
print("running %s" % cmd)
timeout = datetime.timedelta(seconds=secs)
proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT, shell=True)
start = datetime.datetime.now()
while ( proc.poll() is None and (datetime.datetime.now() - start)
< timeout): #not timed out
print proc.stdout.readline() #TODO timestamp?
print "hello,i'm here"
sleep(1)
if 0 == proc.poll():
print("'%s' is program exited" %cmd)
else:
try:
os.kill(proc.pid, signal.SIGINT)
print "Process timeout: '%s'" % cmd
except OSError:
pass
#cmd="ping 128.114.122.2"
cmd="ssh r...@10.0.0.1"
host_run(cmd,10)
if cmd="ssh r...@10.0.0.1"
it never print "hello i'm here" , how can i handle this issue, and I
find my script cant process the "timeout" to kill it.
if cmd="ping 128.114.122.2", no this issue.
Lei
On Sun, Dec 19, 2010 at 4:57 PM, Alan Gauld wrote:
>
> "lei yang" wrote
>
>
> def runForAWhile(cmd, secs=10):
> print("running %s" % cmd)
> timeout = datetime.timedelta(seconds=secs)
> print timeout
> proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
> stderr=subprocess.STDOUT, shell=True)
> status = proc.poll()
>
> You are still only checking status once outside the while loop.
>
> start = datetime.datetime.now()
> while (status is None and (datetime.datetime.now() - start) <
> timeout): #not timed out
> print proc.stdout.readline() #TODO timestamp?
> #print status
> #print datetime.datetime.now() - start
>
>
>> I see that "status" always "!=0“ why program is NOT exited
>
>
> --
> Alan Gauld
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
>
>
> ___
> Tutor maillist - tu...@python.org
> To unsubscribe or change subscription options:
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Re: [Tutor] why "ifconfig" is alway running?
On Sun, Dec 19, 2010 at 7:56 PM, Evert Rol wrote:
>> #!/usr/bin/env python
>> import datetime
>> import subprocess
>> import sys
>> import os
>> import signal
>> from time import sleep
>>
>> def host_run(cmd, secs=10):
>> print("running %s" % cmd)
>> timeout = datetime.timedelta(seconds=secs)
>> proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
>> stderr=subprocess.STDOUT, shell=True)
>> start = datetime.datetime.now()
>> while ( proc.poll() is None and (datetime.datetime.now() - start)
>> < timeout): #not timed out
>> print proc.stdout.readline() #TODO timestamp?
>> print "hello,i'm here"
>> sleep(1)
>> if 0 == proc.poll():
>> print("'%s' is program exited" %cmd)
>> else:
>> try:
>> os.kill(proc.pid, signal.SIGINT)
>> print "Process timeout: '%s'" % cmd
>> except OSError:
>> pass
>> #cmd="ping 128.114.122.2"
>> cmd="ssh r...@10.0.0.1"
>> host_run(cmd,10)
>>
>> if cmd="ssh r...@10.0.0.1"
>> it never print "hello i'm here" , how can i handle this issue, and I
>> find my script cant process the "timeout" to kill it.
>> if cmd="ping 128.114.122.2", no this issue.
>
> Have you tried running these two commands from the command line?
> Spot the difference: ssh is waiting for input (a password. And if
> passwordless, it may still not produce output to stdout), while ping just
> continues to produce output.
> Then look at the line
> print proc.stdout.readline()
> Will that ever read a full line for the ssh command? Probably not, while for
> ping it will.
>
it's a test, actually, I can't access 10.0.0.1, i just want to kill it
if *no responding" in 10 second, but it doesn't kill it. I don't know
why.
my script is to run a cmd, if more than 10 sec, kill it
can you show me where is wrong, thanks in advance
Lei
> So my guess is, your script gets stuck at that line.
> But if you ctrl-C to stop the script, you should see where your program gets
> stuck. You didn't say where it got stuck, that would have helped.
>
> Good luck,
>
> Evert
>
>
>> On Sun, Dec 19, 2010 at 4:57 PM, Alan Gauld
>> wrote:
>>>
>>> "lei yang" wrote
>>>
>>>
>>> def runForAWhile(cmd, secs=10):
>>> print("running %s" % cmd)
>>> timeout = datetime.timedelta(seconds=secs)
>>> print timeout
>>> proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
>>> stderr=subprocess.STDOUT, shell=True)
>>> status = proc.poll()
>>>
>>> You are still only checking status once outside the while loop.
>>>
>>> start = datetime.datetime.now()
>>> while (status is None and (datetime.datetime.now() - start) <
>>> timeout): #not timed out
>>> print proc.stdout.readline() #TODO timestamp?
>>> #print status
>>> #print datetime.datetime.now() - start
>>>
>>>
>>>> I see that "status" always "!=0“ why program is NOT exited
>>>
>>>
>>> --
>>> Alan Gauld
>>> Author of the Learn to Program web site
>>> http://www.alan-g.me.uk/
>>>
>>>
>>> ___
>>> Tutor maillist - tu...@python.org
>>> To unsubscribe or change subscription options:
>>> http://mail.python.org/mailman/listinfo/tutor
>>>
>> ___
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>
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Re: [Tutor] why "ifconfig" is alway running?
On Sun, Dec 19, 2010 at 8:09 PM, Evert Rol wrote:
>>>> #!/usr/bin/env python
>>>> import datetime
>>>> import subprocess
>>>> import sys
>>>> import os
>>>> import signal
>>>> from time import sleep
>>>>
>>>> def host_run(cmd, secs=10):
>>>> print("running %s" % cmd)
>>>> timeout = datetime.timedelta(seconds=secs)
>>>> proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
>>>> stderr=subprocess.STDOUT, shell=True)
>>>> start = datetime.datetime.now()
>>>> while ( proc.poll() is None and (datetime.datetime.now() - start)
>>>> < timeout): #not timed out
>>>> print proc.stdout.readline() #TODO timestamp?
>>>> print "hello,i'm here"
>>>> sleep(1)
>>>> if 0 == proc.poll():
>>>> print("'%s' is program exited" %cmd)
>>>> else:
>>>> try:
>>>> os.kill(proc.pid, signal.SIGINT)
>>>> print "Process timeout: '%s'" % cmd
>>>> except OSError:
>>>> pass
>>>> #cmd="ping 128.114.122.2"
>>>> cmd="ssh r...@10.0.0.1"
>>>> host_run(cmd,10)
>>>>
>>>> if cmd="ssh r...@10.0.0.1"
>>>> it never print "hello i'm here" , how can i handle this issue, and I
>>>> find my script cant process the "timeout" to kill it.
>>>> if cmd="ping 128.114.122.2", no this issue.
>>>
>>> Have you tried running these two commands from the command line?
>>> Spot the difference: ssh is waiting for input (a password. And if
>>> passwordless, it may still not produce output to stdout), while ping just
>>> continues to produce output.
>>> Then look at the line
>>> print proc.stdout.readline()
>>> Will that ever read a full line for the ssh command? Probably not, while
>>> for ping it will.
>>>
>>
>> it's a test, actually, I can't access 10.0.0.1, i just want to kill it
>> if *no responding" in 10 second, but it doesn't kill it. I don't know
>> why.
>> my script is to run a cmd, if more than 10 sec, kill it
>> can you show me where is wrong, thanks in advance
>
> But you never said where the script gets stuck. That would be a very
> important first step for debugging.
>
> And if I run this script, I get the following:
> "
> $> python bla.py
> running ssh r...@10.0.0.1
> ssh: connect to host 10.0.0.1 port 22: Connection refused
>
> hello,i'm here
> "
> So seems to work for me.
> thus, what is the result of
> $> ssh r...@10.0.0.1
> for you?
>
[lya...@pek-lpgbuild13 py]$ ssh r...@10.0.0.1
ssh: connect to host 10.0.0.1 port 22: Connection timed out
but it will wait for above 30 seconds then print "ssh: connect to host
10.0.0.1 port 22: Connection timed out", but my script is designed to
kill it if cmd running more than 10 secs.
Lei
> Evert
>
>
>>> So my guess is, your script gets stuck at that line.
>>> But if you ctrl-C to stop the script, you should see where your program
>>> gets stuck. You didn't say where it got stuck, that would have helped.
>>>
>>> Good luck,
>>>
>>> Evert
>>>
>>>
>>>> On Sun, Dec 19, 2010 at 4:57 PM, Alan Gauld
>>>> wrote:
>>>>>
>>>>> "lei yang" wrote
>>>>>
>>>>>
>>>>> def runForAWhile(cmd, secs=10):
>>>>> print("running %s" % cmd)
>>>>> timeout = datetime.timedelta(seconds=secs)
>>>>> print timeout
>>>>> proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
>>>>> stderr=subprocess.STDOUT, shell=True)
>>>>> status = proc.poll()
>>>>>
>>>>> You are still only checking status once outside the while loop.
>>>>>
>>>>> start = datetime.datetime.now()
>>>>> while (status is None and (datetime.datetime.now() - start) <
>>>>> timeout): #not timed out
>>>>> print proc.stdout.readline() #TODO timestamp?
>>>>> #print status
>>>>> #print datetime.datetime.now() - start
>>>>>
>>>>>
>>>>>> I see that "status" always "!=0“ why program is NOT exited
>>>>>
>>>>>
>>>>> --
>>>>> Alan Gauld
>>>>> Author of the Learn to Program web site
>>>>> http://www.alan-g.me.uk/
>>>>>
>>>>>
>>>>> ___
>>>>> Tutor maillist - tu...@python.org
>>>>> To unsubscribe or change subscription options:
>>>>> http://mail.python.org/mailman/listinfo/tutor
>>>>>
>>>> ___
>>>> Tutor maillist - tu...@python.org
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>>>
>>>
>
>
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Re: [Tutor] why "ifconfig" is alway running?
On Sun, Dec 19, 2010 at 8:29 PM, Evert Rol wrote:
>>>>>> #!/usr/bin/env python
>>>>>> import datetime
>>>>>> import subprocess
>>>>>> import sys
>>>>>> import os
>>>>>> import signal
>>>>>> from time import sleep
>>>>>>
>>>>>> def host_run(cmd, secs=10):
>>>>>> print("running %s" % cmd)
>>>>>> timeout = datetime.timedelta(seconds=secs)
>>>>>> proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
>>>>>> stderr=subprocess.STDOUT, shell=True)
>>>>>> start = datetime.datetime.now()
>>>>>> while ( proc.poll() is None and (datetime.datetime.now() - start)
>>>>>> < timeout): #not timed out
>>>>>> print proc.stdout.readline() #TODO timestamp?
>>>>>> print "hello,i'm here"
>>>>>> sleep(1)
>>>>>> if 0 == proc.poll():
>>>>>> print("'%s' is program exited" %cmd)
>>>>>> else:
>>>>>> try:
>>>>>> os.kill(proc.pid, signal.SIGINT)
>>>>>> print "Process timeout: '%s'" % cmd
>>>>>> except OSError:
>>>>>> pass
>>>>>> #cmd="ping 128.114.122.2"
>>>>>> cmd="ssh r...@10.0.0.1"
>>>>>> host_run(cmd,10)
>>>>>>
>>>>>> if cmd="ssh r...@10.0.0.1"
>>>>>> it never print "hello i'm here" , how can i handle this issue, and I
>>>>>> find my script cant process the "timeout" to kill it.
>>>>>> if cmd="ping 128.114.122.2", no this issue.
>>>>>
>>>>> Have you tried running these two commands from the command line?
>>>>> Spot the difference: ssh is waiting for input (a password. And if
>>>>> passwordless, it may still not produce output to stdout), while ping just
>>>>> continues to produce output.
>>>>> Then look at the line
>>>>> print proc.stdout.readline()
>>>>> Will that ever read a full line for the ssh command? Probably not, while
>>>>> for ping it will.
>>>>>
>>>>
>>>> it's a test, actually, I can't access 10.0.0.1, i just want to kill it
>>>> if *no responding" in 10 second, but it doesn't kill it. I don't know
>>>> why.
>>>> my script is to run a cmd, if more than 10 sec, kill it
>>>> can you show me where is wrong, thanks in advance
>>>
>>> But you never said where the script gets stuck. That would be a very
>>> important first step for debugging.
>>>
>>> And if I run this script, I get the following:
>>> "
>>> $> python bla.py
>>> running ssh r...@10.0.0.1
>>> ssh: connect to host 10.0.0.1 port 22: Connection refused
>>>
>>> hello,i'm here
>>> "
>>> So seems to work for me.
>>> thus, what is the result of
>>> $> ssh r...@10.0.0.1
>>> for you?
>>>
>>
>> [lya...@pek-lpgbuild13 py]$ ssh r...@10.0.0.1
>> ssh: connect to host 10.0.0.1 port 22: Connection timed out
>>
>> but it will wait for above 30 seconds then print "ssh: connect to host
>> 10.0.0.1 port 22: Connection timed out", but my script is designed to
>> kill it if cmd running more than 10 secs.
>
> So it doesn't produce output for at least 30 secs. Then my guess that it gets
> stuck at the readline() line still stands.
Right, it gets stuck at the readline(), is there a function not get
stuck to instead of readline().
Lei
> Unfortunately, you still haven't told us where the script gets stuck.
> Also, have you tried to let the script run for, say, 30 seconds at least? Ie,
> the time it takes for the ssh command to time out by itself.
>
> Evert
>
>
>>
>>
>> Lei
>>
>>> Evert
>>>
>>>
>>>>> So my guess is, your script gets stuck at that line.
>>>>> But if you ctrl-C to stop the script, you should see where your program
>>>>> gets stuck. You didn't say where it got stuck, that would have helped.
>>>>>
>>>>> Good luck,
>>>>>
>>>>> Evert
>>>
Re: [Tutor] why "ifconfig" is alway running?
On Sun, Dec 19, 2010 at 9:05 PM, Sander Sweers wrote:
> On 19 December 2010 13:43, lei yang wrote:
>> Right, it gets stuck at the readline(), is there a function not get
>> stuck to instead of readline().
>
> readline() will keep reading stdout until it received a newline
> character. So if there is nothing to read it will wait forever. The
> solution is to wait with reading until there is actually something to
> read. And it is recommended [1] to use proc.communicate() instead of
> reading directly from stdout.
>
> Also you should use proc.terminate() or proc.kill() to stop the command.
>
> Below is a modified version of your function to show what I mean.
>
> [1] http://docs.python.org/library/subprocess.html#subprocess.Popen.stdin
>
Thanks very much, that's really what I want
Lei
> Greets
> Sander
>
> def host_run(cmd, secs=10):
> print("running %s" % cmd)
> timeout = datetime.timedelta(seconds=secs)
> proc = subprocess.Popen(
> cmd,
> stdout=subprocess.PIPE,
> stderr=subprocess.STDOUT,
> shell=True)
> start = datetime.datetime.now()
> while ( proc.poll() is None and (datetime.datetime.now() - start)
> < timeout): #not timed out
> print "hello,i'm here"
> sleep(1)
> if 0 == proc.poll():
> stdout, stderr = proc.communicate() #get stdout and stderr
> print("'%s' is program exited" %cmd)
> print stdout
> print stderr
> else:
> proc.terminate() #Can use proc.kill() as well
> stdout, stderr = proc.communicate() #get stdout and stderr
> print 'Timeout: Process terminated'
> print stdout
> print stderr
>
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Re: [Tutor] why "ifconfig" is alway running?
On Sun, Dec 19, 2010 at 9:05 PM, Sander Sweers wrote:
> On 19 December 2010 13:43, lei yang wrote:
>> Right, it gets stuck at the readline(), is there a function not get
>> stuck to instead of readline().
>
> readline() will keep reading stdout until it received a newline
> character. So if there is nothing to read it will wait forever. The
> solution is to wait with reading until there is actually something to
> read. And it is recommended [1] to use proc.communicate() instead of
> reading directly from stdout.
>
> Also you should use proc.terminate() or proc.kill() to stop the command.
>
> Below is a modified version of your function to show what I mean.
>
> [1] http://docs.python.org/library/subprocess.html#subprocess.Popen.stdin
>
> Greets
> Sander
>
> def host_run(cmd, secs=10):
> print("running %s" % cmd)
> timeout = datetime.timedelta(seconds=secs)
> proc = subprocess.Popen(
> cmd,
> stdout=subprocess.PIPE,
> stderr=subprocess.STDOUT,
> shell=True)
> start = datetime.datetime.now()
> while ( proc.poll() is None and (datetime.datetime.now() - start)
> < timeout): #not timed out
> print "hello,i'm here"
> sleep(1)
> if 0 == proc.poll():
> stdout, stderr = proc.communicate() #get stdout and stderr
> print("'%s' is program exited" %cmd)
> print stdout
> print stderr
> else:
> proc.terminate() #Can use proc.kill() as well
my python verison is 2.5, so has no kill or terminate attribute, so I still use
os.kill(proc.pid, signal.SIGINT) instead
> stdout, stderr = proc.communicate() #get stdout and stderr
and I find it will get stuck here
> print 'Timeout: Process terminated'
> print stdout
> print stderr
>
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[Tutor] what's wrong with this ?
>>>start_time = "2014-7-1"
>>> revlines = commands.getoutput("git log --pretty=format:'%ad:%an'
--date=short --since='%s' --no-merges" %start_time).strip().split('\n')
Traceback (most recent call last):
File "", line 1, in
ValueError: unsupported format character 'a' (0x61) at index 26
>>>
if I directly use
revlines = commands.getoutput("git log --pretty=format:'%ad:%an'
--date=short --since='2014-7-1' --no-merges" ).strip().split('\n')
it works well
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[Tutor] help about to how many times the function called
Hi experts I have a function will print PASS status def print_pass(t_elapsed): """ Print PASS to stdout with PASS (green) color. """ print_stdout(bcolors.PASS + "PASS" + bcolors.ENDC + " (%.2f s)" % t_elapsed) I want to calculate the pass number, so I want to get " how many times this function called" any help? Lei ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] how to send "ctrl+a+c" with python
Hi expert,
I want to use pexpect to send "ctrl+a+c"
how should I do?
self.vm_session.sendline("")
how to fill ???
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Re: [Tutor] how to send "ctrl+a+c" with python
thanks, it works for me
Lei
On Wed, Jan 22, 2014 at 10:35 PM, eryksun wrote:
> On Wed, Jan 22, 2014 at 8:49 AM, lei yang wrote:
> >
> > I want to use pexpect to send "ctrl+a+c"
>
> What's ctrl+a+c? If this is for screen, then I think you mean ctrl+a c:
>
> sendcontrol('a')
> send('c')
>
___
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[Tutor] how to express shift+enter in python
Hi expert, How to express shift+enter in python ? Thanks ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] how to express shift+enter in python
Hi Chris, I just use "xlwt" lib to newline in one cell, I find it display with one line in windows but works in linux, so I guess it maybe"shift+enter" to newline Lei On Sun, Sep 28, 2014 at 11:04 PM, Chris “Kwpolska” Warrick < kwpol...@gmail.com> wrote: > On Sun, Sep 28, 2014 at 4:53 PM, lei yang wrote: > > Hi expert, > > > > How to express shift+enter in python ? > > > > Thanks > > What do you want to express, exactly? This key combination can have > multiple meanings and ways to achieve it, depending on your needs. Do > you want to send the key combination to an app? What is it, exactly, > that you want to do? What app uses Shift+Enter in the way you want to > use it? > > -- > Chris “Kwpolska” Warrick <http://chriswarrick.com/> > PGP: 5EAAEA16 > stop html mail | always bottom-post | only UTF-8 makes sense > ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
