473,785 Members | 2,391 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

read and readline hanging

I am calling subprocess.Pope n with
p = Popen(args, bufsize=-1, stdin=PIPE, stdout=PIPE, stderr=PIPE)
and after sending come command to the process, I try to read
from p.stdout but after a few calls I hang. What is the correct
way to do this, i.e., to read everything w/o getting stuck? I am
not familiar with all these low-level functions and their annoying
blocking behaviour. Note that I don't want to close the process
because I want to send more commands to it after that, read the
results, and so on and on.

Thanks,

-- O.L.

Jan 24 '08 #1
0 938

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

2
1777
by: washu | last post by:
Hi, This may be a simple problem but I can't seem to find a way around it. I've pasted my code snippet below: import os input = os.popen("echo hello") input.readline() input.readline()
18
4893
by: jas | last post by:
Hi, I would like to start a new process and be able to read/write from/to it. I have tried things like... import subprocess as sp p = sp.Popen("cmd.exe", stdout=sp.PIPE) p.stdin.write("hostname\n") however, it doesn't seem to work. I think the cmd.exe is catching it.
2
9950
by: Tim Bücker | last post by:
Hello. Is there a way to read a specified line in a textfile? Something like TextReader.ReadTextLine(4); It seems very odd to use reader.ReadLine(); reader.ReadLine(); reader.ReadLine(); string wishedLine = reader.ReadLine();
3
5225
by: JenHu | last post by:
Hi, I want read line by line and characters. The characters are fix length text file, no specific delimited method between each fields. The first line is header line, the last line is footer. Between the first line and last line is the content, and I will have to load the content to database. How to read line by line? I use For lineNum = LBound(lines) To (UBound(lines) - 1) which generate error because it does read the
1
11303
by: Prasanta | last post by:
Hello, Please cnay one can tell me how to read mail as formatted.... i have made some code using that able to read but not able to serialize..... so am i need to parse the HTML, or is there any class using that i can directly get the full info ablt the mail, like TO,From,Subject,Body,Attachments, Below is the code which i develop, using System;
1
5689
by: Prasanta | last post by:
Hello, How to read a mail from the mail server as formatted. I am able to read the mail as row HTML, is there any class, or something method using that i can easily get the all info of that mail, like as TO,From,Subject,Body. here I am attaching my coe which i developed. using System; using System.Collections.Generic; using System.Text;
9
3014
by: =?Utf-8?B?QnJpYW4gQ29vaw==?= | last post by:
I want to open a text file and format it into a specific line and then apply color to a specific location of the text and then display it in a RichTextBox after all of this is done. I can do all of the above after the file is loaded into the RichTextBox, and I am trying to speed the process up by doing it in a temp file.
2
10403
by: mmrasheed | last post by:
Hi, I am newbie in python. I am working on Telit GM862 GPS/GPRS module which has python interpreter built in. But it seems this problem is pretty much related to general python structure. I need a promt/terminal when the device is connected to PC. If user enters a command by serial port and press "Enter" then the data is read by the device and work on the command. This is similar to readline() function. Unfortunately there is no...
6
3738
by: Sean Davis | last post by:
I have a large file that I would like to transform and then feed to a function (psycopg2 copy_from) that expects a file-like object (needs read and readline methods). I have a class like so: class GeneInfo(): def __init__(self): #urllib.urlretrieve('ftp://ftp.ncbi.nih.gov/gene/DATA/ gene_info.gz',"/tmp/gene_info.gz")
0
9645
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
10148
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
10091
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
9950
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
8972
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
1
7499
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
5511
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4053
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
3
2879
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.