A comma-separated values (CSV) file stores tabular data (numbers and text) as plain text, with rows and columns delimited by line terminators and commas, respectively. You may also use this tag for variants where fields are separated by tabs or semicolons.

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Parse a csv file and create a dictionary of partial results

I have a bunch of csv files which I have to read and look for data. The csv file is of the format: ...
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Parsing CSVs for bulk database insertions

I'm writing this as (eventually) part of a larger program. This will serve as the bulk data insertion from .csv files we parse. I'm primarily looking for parts that are breaking Go's formatting, ...
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189 views

Combat log parser for World of Warcraft

This is part of a bigger project I'm doing to get better at JavaScript. It's basically the beginnings of a combat log parser for World of Warcraft. It looks a bit messy right now and I could really ...
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3answers
187 views

Splitting and printing comma-separated values

I stumbled upon a question on SO asking how to split a comma-separated string into individual values. Since it's been a while since I've had any good reason to write C I'd like to ask for some ...
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1answer
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66 views

CSV writer implementation refactored

Based on my initial implementation found here and the suggested improvements in answers and comments, I've refactored the code. The main changes are: Removed redundant buffering. Simplified ...
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1answer
153 views

CSV writer implementation

I've recently been assigned to write up a CSV writer with "as much flexibility" as possible concerning pretty much all (output stream, string fields with potential new line characters, separator ...
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1answer
78 views

Python CSV file import and object manipulation

I am trying to import a .csv file and save data in objects for later manipulation in Python. I am very new to coding so please do let me know my fundamental errors. ...
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66 views

Extracting two columns from exported iTunes playlist

My friend wanted me to send her a list of songs from one of my iTunes playlists, so I exported the playlist within the app itself. It comes as a plain text file, where each field is separated a ...
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1answer
64 views

Enhance CSV file database import

I'm using the script below to import a large .csv file to my database. If the table is empty the process takes about 5 minutes to finish on a local machine. If I'm using the file to update existing ...
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31 views

Store CSV in Redis

I needed to make a small script to read a csv file and store 2 columns in Redis. Can you guys take a look over the code and let me know how I can improve my code style? ...
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361 views

Print Student Names from CSV

Description Print all student names from a CSV file. CSV Format: CSV file does not contain string delimited by double quotes. None of the cells has "," ...
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1answer
30 views

CSV lookup problem solved with CoffeeScript

Source code with some test: ...
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1answer
45 views

Using a TSV text file and map for a Q&A program

The program outputs a menu asking for a new question or to ask a question. If you ask a question, it will search a .tsv text file for the question and return the answer. It will then check a map that ...
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1answer
96 views

Read from csv file, transform to dictionnary

First of all, here's the code I'm working on: ...
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131 views

Concatenating rows in CSV files and removing old CSV files

I have written my first Python script that will go into live use at my workplace. I am relatively new to Python and I think this script is pretty good but I would like your input. It runs very fast, ...
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1answer
68 views

Read CSV with 3 columns and group some elements

I have a csv with 3 columns (date, name, number) and it is about 20K rows long. I want to create a dictionary keyed by date whose value is a dictionary of ...
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1answer
55 views

AD update from CSV

I get a CSV dump of all employee records from our payroll system once a week. The CSV has something like 28K records. The key between the two systems is the ...
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2answers
426 views

CSV reader using StreamReader and LINQ

Mostly due to readability, I am using the following code to find a specific csv file on a drive read that CSV file using a streamReader parse it into a ...
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1answer
165 views

Slow Python text-processing script

This script of mine merges columns 1 and 2 from one input file and sees if these merged combinations exist in the other infile (and vice versa). I know I get stuck in appending. It did not get past ...
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55 views

Speeding up filtering function in Pandas

I have a CSV file with 400 000 rows and the following headers: ...
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1answer
57 views

A module to display, update and save a dictionary as .csv v2.0

I'd like feedback on my revised code after my previous question. The goal is to create a module which can display, update, save dictionaries as .csv files. I'll use this in another program to update ...
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3answers
193 views

A program to display, update and save a dictionary as .csv

I'm now looking for feedback on v2.0 of this program instead. I'd like some feedback about my code. What bad habits do I have? What advice could help me write more Pythonic? I'm trying to write a ...
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1answer
153 views

Processing Excel files of a predefined template to generate output CSV files of another predefined template

I'm a freelancer and I recently wrote a python script that processes input xlsx files that contain data in a particular format and output a csv file in another format as required. The code works well ...
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53 views

Vectorize Fisher's Exact Test

I have two data frames/ lists of data, humanSplit and ratSplit, and they are of the form ...
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75 views

Adding file name information to CSV file columns

Is there a simple way to combine the functions of this Powershell script? It would be nice to have it file to one output file instead of several output files. ...
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2answers
33 views

Creating two output files from two formatted files

I've been working on a project to take data from csv files, re-format it, and display it as charts. I'm working for a company over the summer and when I leave, I would like my code to be ...
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1answer
73 views

Returning information about the result of a file processing, without using output parameters [closed]

As part of a C# class CsvConverter that converts various file types to CSV, I am designing a private class CsvConversionResult. ...
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285 views

Find the peak stock price for each company from CSV data

During the hiring process, a company gave me this test: Q) Consider Share prices for a N number of companies given for each month since year 1990 in a CSV file. Format of the file is as below ...
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3answers
108 views

CSV demographics analyzer seems to waste memory/move slowly

I'm much more fluent in JS, but I needed to sort a lot of dates, ages, genders, etc. from a tab-delimited text file so I wrote this. Could I get some tips on how to make this more efficient and more ...
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3answers
238 views

CSV reader (revised)

This is the successor of my previous CSV reader. I implemented quite some useful suggestions. I will give explanation on a few parts: Prefixing constant identifiers with ...
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5answers
351 views

Convert total minutes into “Hours:minute:seconds” for marathon data

The point of the script below is to read in the 10th column which is the total number of minutes a runner took to finish the marathon and convert it into form of "hours:minutes:seconds". Is there a ...
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5answers
987 views

CSV reader and parser

I have implemented a CSV reader. I think I did pretty well. Since CSV is a loosely defined format to begin with I decided to allow some malformations, like anything but a delimiter after an enclosed ...
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5answers
1k views

Parsing CSV to specific format

I've written this code to read CSV files written in a specific format. I would like to gather some feedback on where it could be improved. I'm trying to get into the Test-Driven-Development ideology ...
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1answer
215 views

Refactoring Tkinter GUI that reads from and updates csv files, and opens E-Run files

Background My lab administers four computer programs in three separate appointments. At each appointment, the subject does the programs in a pseudo-randomized order. Also, three of the programs have ...
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1answer
57 views

explode textarea and commas [closed]

Am attempting to recreate a common feature, where a user can type several items in to a textarea, separated by commas and newlines and then submit them, i.e. for multiple record entry. The data does ...
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1answer
96 views

Converting JDBC to CSV

One of my first ever jython scripts lets me get comma-separated values out of an RDBMS. I submit it here in hopes that you'll rip me apart. Without further ado, have at it: ...
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3answers
73 views

Command line tools to format tables

I am a big fan of one-liners using sed awk perl and other tools. But there are that are ...
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118 views

Improving performances processing compressed csv files

I have some csv files compressed in .bz2 format. I need to take a subset of the records (and data) and switch to .gz. I am not ...
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166 views

Finding nearest city from a center place (latitude and longitude) with radius in miles

This is my code for finding the nearest city within a certain radius. I am not sure, is my code is OK or is it wrong? Please review and offer suggestions on my code. ...
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2answers
1k views

MemoryError in Python while combining multiple JSON files and outputting as single CSV

I have a number of JSON files to combine and output as a single CSV (to load into R), with each JSON file at about 1.5GB. While doing a trial on 4-5 JSON files at 250MB each, the code works when I ...
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1answer
130 views

String modification application

Below is working code of a semi complete program. Its purpose is to take an input string of any type and modify it based on rules defined for each type. So in this example I pass it a string in CSV ...
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2answers
85 views

Data screening using Perl

Background information I've been asked to write a little Perl script that allows genomic data to be screened against reference files in order to determine locations of specific mutations. The input ...
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4answers
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Comparing phone numbers across CSVs Python

(continuation from Speeding up and fixing phone numbers from CSVs with Regex) I'm pulling all of the phone numbers from all CSVs in two different directories, outputting them in a single simple ...
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2answers
135 views

Speeding up and fixing phone numbers from CSVs with Regex

I've hodgepodged together an attempt to extract all phone numbers from all CSVs in a directory, regardless of where they are and what format they're in. I want all phone numbers to be printed to a ...
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1answer
417 views

Parse Bloomberg Excel/CSV with Pandas DataFrame

I retrieved Bloomberg data using the Excel API. In the typical fashion, the first row contains tickers in every fourth column, and the second row has the labels Date, PX_LAST, [Empty Column], Date, ...
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1k views

Parsing CSV file with BufferedReader vs Scanner

I have to parse file line by line and in single line I have split by ",". First String would be Name and Second would be count. Finaly I have to display the Key and Count For example ...
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403 views

Averaging numbers from a file, obeying Single Responsibility Principle

Task: Given comma_separated.txt file with string: 1,2,3,4,5,6,7,8,9,10,11,12...,n Calculate the average ...
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189 views

Optimizing a function to read bigger files in php

I have the following function that reads data from a csv file and it is supposed to take in data which is from a certain certain timeinterval in this case 07:59 and saves them up in another csv file. ...
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1answer
2k views

Printing out JSON data from Twitter as a CSV?

I'm extremely new to Python, and the Twitter API, but I found a example online that walked me through the process. Now that I've been playing around with it for awhile, I've begun to push the limits ...