473,847 Members | 1,795 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Noobie Question reg Delimited Text

3 New Member
Hope the Community can bear with me as I muddle with the vocabulary since I am not really sure if I am going about this the correct way.

My question is as follows:

If I had some sample data in the form of delimited text, in this case comma-delimited (eg. canned_data.txt ) and the format looked roughly like this:

name,age,occupa tion,status
"joe blow",21,salesm an,married
"hanna montana,19,ente rtainer,single


I am confused with how to go about

1) importing this file into Python for reading line-by-line for eventual parsing,splitti ng, general manipulation to a new output file
2) the exact terminology/vocab (I have come across array,matrix,ta ble, etc.)

So far I would do something like this:
Expand|Select|Wrap|Line Numbers
  1. # start of my module
  2. tInputName = raw_input("Enter the name of your delimited input file:") #canned_data.txt in the same directory as module
  3. tOutputName= raw_input("Enter the name of your output file:")
  4. getData = open(tInputName,r)
  5. getData = input.readlines()
  6. for line in getData
  7.    getData = line.split(",") #my series of general data manipulation
  8.    getData = line.upper #another eg of manipulation
  9. output.writelines(tOutputName)
  10. output.close()
  11. if output.close == true
  12. print "The file:", tOutputName, " was created"
  13. raw_input()
  14. else
  15. output.close ==false
  16. print "Failed creating  ", tOutputName
  17. raw_input()

In a nutshell, could someone help me vett the above?
Dec 12 '08 #1
1 1992
2,851 Recognized Expert Moderator Specialist
Please use code tags when posting code!!

Python for loops and if statements require a colon for proper syntax.
Expand|Select|Wrap|Line Numbers
  1. for name in nameList:
  2.     print name
  4. if name == "Fred":
  5.     print "Fred's here."
  6. else:
  7.     print "I don't know this guy."
Generally, if an error occurs when opening, reading, or writing to a file, an IOError exception is raised. This error can be caught with a try/except block.
Expand|Select|Wrap|Line Numbers
  1. >>> try:
  2. ...     f = open('abc')
  3. ... except IOError, e:
  4. ...     print e
  5. ...     print e.errno, e.strerror, e.filename
  6. ...     
  7. [Errno 2] No such file or directory: 'abc'
  8. 2 No such file or directory abc
  9. >>> 
File I/O seldom errors except when invalid file names or paths are attempted.

Following are examples of opening a file, manipulating the data, and writing to another file. The first example uses list comprehensions. The second is the equivalent without the list comprehensions.
Expand|Select|Wrap|Line Numbers
  1. infile = open('names.txt')
  2. outfile = open('names_reversed.txt', 'w')
  4. results = []
  5. for line in infile:
  6.     results.append([item for item in line.strip().split(',')[::-1]])
  7. infile.close()
  9. outfile.write('\n'.join([','.join(item) for item in results]))
  10. outfile.close()
  12. ''' output file contents
  13. status,occupation,age,name
  14. married,salesman,21,joe blow
  15. single,entertainer,19,hanna montana
  16. '''
  18. infile = open('names.txt')
  19. outfile = open('names_reversed1.txt', 'w')
  21. results = []
  22. for line in infile:
  23.     lineList = line.strip().split(',')
  24.     lineList = lineList[::-1]
  25.     results.append(lineList)
  26. infile.close()
  28. output = []
  29. for item in results:
  30.     output.append(','.join(item))
  32. outfile.write('\n'.join(output))
  33. outfile.close()
Dec 12 '08 #2

Sign in to post your reply or Sign up for a free account.

Similar topics

by: Christine Forber | last post by:
I wonder if anyone knows of some javascript code to check a comma-delimited list of email addresses for basic formating. What I'm looking for is the javascript code to check a form field on form submission. If there is an entry in the field, does it match the following: text@text.text, text@text.text,text@text.text where each address is between commas and each address is in the format
by: Ben | last post by:
Hi all - I am having a bit of trouble and thought maybe someone in this group could shed some light. Here's the skinny... I am creating an automated process to import a bunch of text files into Access. I want to avoid creating a separate "Spec" for each file (there are over 180 files) and instead want to code my own dynamic importing rules. So far it's been going fine, except for one item...
by: The Bear | last post by:
I have populated a dataset with a tab delimited text file. When the changes are made in the dataset, I then want to write those changes from the dataset to a tab delimited text file. How do I write each record to that text file. If anyone one knows I would really appreciate the help TB
by: Joe Fisherman | last post by:
I have used regex to parse a huge text file, and grab a tab delimited portion of it. I often use comma delimited text files, and use Jet Oledb4. I read that I would need an ini if the file wasn't comma delimited - if this is true, I am not sure of the easiest process to create an ini. The string has a header. My string looks like: "Call" "Date" "Time" "Call Period" "From" "Call Type" "Number Called" "To" "Call Length" "Local Airtime...
by: denisel | last post by:
Hi, We will be conducting surveys through SurveyMonkey online and will be importing the answers by tab delimited or comma delimited file into access. I was wondering if there is specific way to import delimited files into Access or Is there a specific way I should design the survey online so Access can recognize the file? Here is my table structure to give you an idea on where I'm coming from. Thank you so much in advance!!! ...
by: Fordraiders | last post by:
vb.net 2003 Office 2003 What I have: C:\TestData\Input.txt Text File Pipe Delimited : 4 columns Of data example: 00001|NO BRAND NAME ASSIGNED|6DU27|M3-.5 X 6 FLAT HD SOCKET CAP SCREW, CL10.9, ALLOY STEEL 00002|NO BRAND NAME ASSIGNED|6DU28|M3-.5 X 8 FLAT HD SOCKET CAP SCREW,
by: Ron | last post by:
How do I display delimited text on multiple lines in a listbox? For example in my textbox I have this: Joe Doe,123 Street,Mytown and In a listbox then I want to display: Joe Doe 123 Street Mytown
by: Ron | last post by:
so if my textbox is named textbox1 and my listbox is named ltsdisplay, for the button that would make this all happen I would just need to: lstdisplay.items.textbox1(delimited.Split(",".ToCharArray())) is that right? or no? I try this and I get an error...
by: =?Utf-8?B?UmljaA==?= | last post by:
'--this code works but only reads text into one column when contains multiple cols Dim ds1x As New DataSet Dim ConStr As String = _ "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\dir1A\;Extended Properties=""Text;HDR=No;FMT=Delimited\""" Dim conn1x As New OleDb.OleDbConnection(ConStr) Dim dax1 As New OleDbDataAdapter("Select * from testabc1x.txt", conn1x)
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...
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,...
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...
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...
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

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.