🌐 Mailman 3 June 2006 - Python-list - python.org

screen capture
by py Sept. 29, 2006

Sept. 29, 2006

I need to take a screen shot of the computer screen. I am trying to use PIL and I saw there is ImageGrab...however it only works on Windows. Is there a platform-independent ability to work around this? thanks

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How to catch python's STDOUT
by praveenkumar.117＠gmail.com Aug. 1, 2006

Aug. 1, 2006

Hi, Can someone help me by suggesting how to capture python's STDOUT. I doesn't want the python's output to get displayed on the screen.

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Help beautify ugly heuristic code
by Stuart D. Gathman July 25, 2006

July 25, 2006

I have a function that recognizes PTR records for dynamic IPs. There is no hard and fast rule for this - every ISP does it differently, and may change their policy at any time, and use different conventions in different places. Nevertheless, it is useful to apply stricter authentication standards to incoming email when the PTR for the IP indicates a dynamic IP (namely, the PTR record is ignored since it doesn't mean anything except to the ISP). This is because Windoze Zombies are the favorite platform of spammers. Here is the very ugly code so far. It offends me to look at it, but haven't had any better ideas. I have lots of test data from mail logs. # examples we don't yet recognize: # # 1Cust65.tnt4.atl4.da.uu.net at ('67.192.40.65', 4588) # 1Cust200.tnt8.bne1.da.uu.net at ('203.61.67.200', 4144) # 1Cust141.tnt30.rtm1.nld.da.uu.net at ('213.116.154.141', 2036) # user64.net2045.mo.sprint-hsd.net at ('67.77.185.64', 3901) # wiley-268-8196.roadrunner.nf.net at ('205.251.174.46', 4810) # 221.fib163.satnet.net at ('200.69.163.221', 3301) # cpc2-ches1-4-0-cust8.lutn.cable.ntl.com at ('80.4.105.8', 61099) # user239.res.openband.net at ('65.246.82.239', 1392) # xdsl-2449.zgora.dialog.net.pl at ('81.168.237.145', 1238) # spr1-runc1-4-0-cust25.bagu.broadband.ntl.com at ('80.5.10.25', 1684) # user-0c6s7hv.cable.mindspring.com at ('24.110.30.63', 3720) # user-0c8hvet.cable.mindspring.com at ('24.136.253.221', 4529) # user-0cdf5j8.cable.mindspring.com at ('24.215.150.104', 3783) # mmds-dhcp-11-143.plateautel.net at ('63.99.131.143', 4858) # ca-santaanahub-cuda3-c6b-134.anhmca.adelphia.net at ('68.67.152.134', 62047) # cbl-sd-02-79.aster.com.do at ('200.88.62.79', 4153) # h105n6c2o912.bredband.skanova.com at ('213.67.33.105', 3259) import re ip3 = re.compile('([0-9]{1,3})[.x-]([0-9]{1,3})[.x-]([0-9]{1,3})') rehmac = re.compile( 'h[0-9a-f]{12}[.]|pcp[0-9]{6,10}pcs[.]|no-reverse|S[0-9a-f]{16}[.][a-z]{2}[.]' ) def is_dynip(host,addr): """Return True if hostname is for a dynamic ip. Examples: >>> is_dynip('post3.fabulousdealz.com','69.60.99.112') False >>> is_dynip('adsl-69-208-201-177.dsl.emhril.ameritech.net','69.208.201.177') True >>> is_dynip('[1.2.3.4]','1.2.3.4') True """ if host.startswith('[') and host.endswith(']'): return True if addr: if host.find(addr) >= 0: return True a = addr.split('.') ia = map(int,a) m = ip3.search(host) if m: g = map(int,m.groups()) if g == ia[1:] or g == ia[:3]: return True if g[0] == ia[3] and g[1:] == ia[:2]: return True g.reverse() if g == ia[1:] or g == ia[:3]: return True if rehmac.search(host): return True if host.find("%s." % '-'.join(a[2:])) >= 0: return True if host.find("w%s." % '-'.join(a[:2])) >= 0: return True if host.find("dsl%s-" % '-'.join(a[:2])) >= 0: return True if host.find(''.join(a[:3])) >= 0: return True if host.find(''.join(a[1:])) >= 0: return True x = "%02x%02x%02x%02x" % tuple(ia) if host.lower().find(x) >= 0: return True z = [n.zfill(3) for n in a] if host.find('-'.join(z)) >= 0: return True if host.find("-%s." % '-'.join(z[2:])) >= 0: return True if host.find("%s." % ''.join(z[2:])) >= 0: return True if host.find(''.join(z)) >= 0: return True a.reverse() if host.find("%s." % '-'.join(a[:2])) >= 0: return True if host.find("%s." % '.'.join(a[:2])) >= 0: return True if host.find("%s." % a[0]) >= 0 and \ host.find('.adsl.') > 0 or host.find('.dial-up.') > 0: return True return False if __name__ == '__main__': import fileinput for ln in fileinput.input(): a = ln.split() if len(a) == 2: ip,host = a if host.startswith('[') and host.endswith(']'): continue # no PTR if is_dynip(host,ip): print ip,host

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What is Expressiveness in a Computer Language
by Xah Lee July 22, 2006

July 22, 2006

in March, i posted a essay “What is Expressiveness in a Computer Language”, archived at: http://xahlee.org/perl-python/what_is_expresiveness.html I was informed then that there is a academic paper written on this subject. On the Expressive Power of Programming Languages, by Matthias Felleisen, 1990. http://www.ccs.neu.edu/home/cobbe/pl-seminar-jr/notes/2003-sep-26/expressiv… Has anyone read this paper? And, would anyone be interested in giving a summary? thanks. Xah xah(a)xahlee.org ∑ http://xahlee.org/

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Application Generators
by walterbyrd July 21, 2006

July 21, 2006

I would like to put together a very simple inventory program. When I ship an item, and edit the quantity; I would like the quantity _on_hand to auto-decrement, and the quantity_to_reorder to auto-increment. Also, when the data is displayed in a table format, I would like to be able to edit the quantity field as I would in a spreadsheet, just edit that field, without having to change to an edit-record screen. I thought the easiest way to do this would be to use a PHP code generator. But I'm not having any luck. Maybe I give up and code by hand? Or maybe I should use django? It seems that application generators never do exactly what you want, and even if they do, what about future development? I am looking for something that will make it easy to put together this simple project, and be flexible enough that I can easily modify the project. This application is supposed to run on hosted server, so that is also a concern. The present host doesn't even have python, but I could move the site to a new host, which has cgi python. I have an open mind. If anybody can suggest anything, I will take a look. Application generators that I have tried: dbQwikSite: I found it difficult to get it to work, and very slow. I had to uninstall Xampp, and install AppServ just to get it to work at all. I don't know why, maybe Xampp's versions of php/mysql were too new? I still can not get it to generate php code that I can use. AppGini: works as advertised, easy to use, inexpensive, and fast. But, frankly, it doesn't do much. As far as I could see, it doesn't even offer the basic security of a login. It just displays data, and allows you to add/delete records. I don't even think you can interactively edit records. Not much reporting capability. PHP-Runner: the best so far. Fast, easy, nice looking display, has basic security, allows editing records. Still does not seem to have the basic functionallity I'm looking for. Other app generators that I have looked at, but not tried: PHP-Peanuts PHPMaker phpmysql DaDaBik WizzyWeb Navicat Again, glad to read any opinions.

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Question regarding commit/backout of a message using the pymqi module
by Andrew Robert July 20, 2006

July 20, 2006

Hi everyone, Could someone help explain what I am doing wrong in this code block? This code block is an excerpt from a larger file that receives transmitted files via IBM WebSphere MQSeries an drops it to the local file system. Transmission of the file works as designed but it has a flaw. If the file cannot be created for whatever reason, the transmitted message is lost. What I am trying to do is ensure that a file transmit is considered successful only after the created file's checksum matches. If not, the code should treat it as an error and roll back the message to MQSeries without a commit. The basis for this should be around the pymqi.QueueManager class which is named mq in the block listed below. On execution, I get the traceback of: Traceback (most recent call last): File "M:\MQ\MQ\Scripts\receiver.py", line 269, in ? receiver.run() File "M:\MQ\MQ\Scripts\receiver.py", line 109, in run self.connect() File "M:\MQ\MQ\Scripts\receiver.py", line 118, in connect self.qm.begin() File "c:\python24\lib\site-packages\pymqi.py", line 738, in begin raise MQMIError(rv[0], rv[1]) pymqi.MQMIError: MQI Error. Comp: 1, Reason 2121: WARNING: MQRC_NO_EXTERNAL_PARTICIPANTS Do you have any idea why this might be occurring? class Receiver(object): def __init__(self,qm_name,queue_name): self.qm_name = qm_name self.queue_name = queue_name # Will be set later self.qm = None self.message = None def run(self): self.connect() self.get() def connect(self): """ Connect to queue manager """ try: self.qm = mq.QueueManager(options.qmanager.upper() ) self.qm.begin() except mq.PYIFError, err: mqevlog.event("error",err) sys.exit(1) def get(self): """ Get a message from queue. """ queue = mq.Queue(self.qm, self.queue_name) pmo = mq.pmo(Options = CMQC.MQPMO_SYNCPOINT) md = mq.md() while True: try: var = queue.get(self.message, md, pmo ) except mq.MQMIError,e: if e.reason != CMQC.MQRC_NO_MSG_AVAILABLE: mqevlog.event("error",e) sys.exit(1) break else: buff = StringIO(var) tree = ElementTree(file=buff) # Extract required elements and assign to local variables key = "this should be a well-kept secret" file_name = tree.find("dest").text creation_time = tree.find("creation_time").text contents = tree.find("contents").text check = tree.find("checksum").text #Decode temp file original = file_encoder.decode(contents) # Drop file to disk if os.path.exists(file_name) is False: open(file_name,"wb").write(original) else: mqevlog.event(sys.argv[0],"error","Output file path/name already exists") sys.exit(1) # Get checksum of newly created file sum=csums.getsum(file_name) # Compare checksum of created file with value transmitted if csums.checksum_compare(sys.argv[0],sum,check,file_name) == True: queue.commit() sys.exit(0) else: queue.backout() mqevlog.event("error","CheckSums of received/transmitted files do not match") sys.exit(1) Any help/insight you can provide on this would be greatly appreciated.

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Execute Commands on Remote Computers over Network
by dylpkls91 July 18, 2006

July 18, 2006

I have been researching this topic and come up with some code to make it work. It uses SSL and requires the 3rd party package Paramiko (which requires PyCrypto). However, at this moment I have no network to test the code on! Trying to connect to localhost (127.0.0.1) fails. Before I buy network components, I want to be sure that this code will work. Will someone with two networked computers try it out for me? Thanks! Code: def remotely_execute_command(ipaddr, port, user, passwd=None, cmd): import paramiko transport = paramiko.Transport(ipaddr + ":" + port) transport.connect(username=user, password=passwd) channel = transport.open_session() channel.exec_command(cmd) print "Command " + cmd + " executed by user " + user + " with password " + passwd + " at " + host + ":" + port

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automatic debugger?
by micklee74＠hotmail.com July 15, 2006

July 15, 2006

hi is there something like an automatic debugger module available in python? Say if i enable this auto debugger, it is able to run thru the whole python program, print variable values at each point, or print calls to functions..etc...just like the pdb module, but now it's automatic. thanks

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OT: Search for python in Norway
by cyberco July 14, 2006

July 14, 2006

Although the climate wouldn't make you think so, but searching for python is hot in Norway: http://www.google.com/trends?q=python&ctab=1&geo=all&date=all I wonder what the explanation could be. Btw: Java seems to be all the rage in India :) http://www.google.com/trends?q=java&ctab=1&geo=all&date=all

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Python in a nutshell - new edition ?
by Helmut Jarausch July 11, 2006

July 11, 2006

Hi, is there a new edition of "Python in a Nutshell" covering Python 2.5 coming soon? Many thanks, Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany

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