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Python Data Type Q&A » string » csv 

1. How can I join a list into a string (caveat)?    stackoverflow.com

Along the lines of my previous question, how can i join a list of strings into a string such that values get quoted cleanly. Something like:

['a', 'one "two" three', 'foo, ...

2. Python: Use the codecs module or use string function decode?    stackoverflow.com

I have a text file that is encoded in UTF-8. I'm reading it in to analyze and plot some data. I would like the file to be read in ...

3. How can I change a list of strings into CSV in Python?    stackoverflow.com

Example strings:

uji708
uhodih
utus29
agamu4
azi340
ekon62
I need to change them into CSV list like this:
uji708,uhodih,utus29,  
agamu4,azi340,ekon62,
My code so far:
email = 'mail_list.txt'
handle = open(email)

for line in handle:
    try:
     ...

4. determine the type of a value which is represented as string in python    stackoverflow.com

When I read a comma seperated file or string with the csv parser in python all items are represented as a string. see example below.

import csv
a = "1,2,3,4,5"
r = csv.reader([a])
for row ...

5. How to parse a single line csv string without the csv.reader iterator in python?    stackoverflow.com

I have a CSV file that i need to rearrange and renecode. I'd like to run

line = line.decode('windows-1250').encode('utf-8')
on each line before it's parsed and split by the CSV reader. Or I'd ...

6. Pyparsing CSV string with random quotes    stackoverflow.com

I have a string like the following:

<118>date=2010-05-09,time=16:41:27,device_id=FE-2KA3F09000049,log_id=0400147717,log_part=00,type=statistics,subtype=n/a,pri=information,session_id=o49CedRc021772,from="prvs=4745cd07e1=example@example.org",mailer="mta",client_name="example.org,[194.177.17.24]",resolved=OK,to="example@example.org",direction="in",message_length=6832079,virus="",disposition="Accept",classifier="Not,Spam",subject="=?windows-1255?B?Rlc6IEZ3OiDg5fDp5fog+fno5fog7Pf46eHp7S3u4+Tp7SE=?="
I tried using CSV module and it didn't fit, cause i haven't found a way to ignore what's quoted. Pyparsing looked like a better answer ...

7. Method for guessing type of data represented currently represented as strings in python    stackoverflow.com

I'm currently parsing CSV tables and need to discover the "data types" of the columns. I don't know the exact format of the values. Obviously, everything that the CSV ...

8. Print elements of a list to a .csv file    stackoverflow.com

I am reading in a csv file and dealing with each line as a list. At the end, I'd like to reprint to a .csv file, but the lines aren't ...

9. reading a file in python    stackoverflow.com

I am new to python been using it for graphics but never done it for other problems. My question is how to read this file which is tab or space delimited ...

10. Python String Manipulation    stackoverflow.com

I have a file that looks like the following. All I want is the Voltage, what is easiest way to strip everything else from it?

Time,Voltage,Peak
0.0,1.003911558621642,3
0.00390625,1.0327467181982755,0
0.0078125,0.9904463156237306,0
0.01171875,0.6867661682528724,0
0.015625,0.6236803073669519,0
0.01953125,0.2934711210503298,0
0.0234375,0.06148933838536881,0
0.02734375,0.07053968550834916,0
0.03125,-0.09041720958299812,0
0.03515625,-0.28273374252040306,0
0.0390625,-0.29775398016603216,0

11. UnicodeDecodeError reading string in CSV    stackoverflow.com

I'm having a problem reading some chars in python. I have a csv file in UTF-8 format, and I'm reading, but when script read:

Preußen Münster-Kaiserslautern II
I get this error:
Traceback (most recent call ...

12. converting a List property to individual values in a CSV export from GAE    stackoverflow.com

I have a list of String inside a class in my App Engine project, and in the database export to a CSV (through bulkloader.yaml) the resulting field is the proper List. The ...

13. Why I can't convert a list of str to a list of floats?    stackoverflow.com

I'm starting to write a code, but it's fail at the beginning. This is my code:

import csv
reader = csv.reader(open("QstartRefseqhg19.head"), dialect='excel-tab' )

for row in reader:
    C = row[1].split(",")[1:]
   ...

14. Finding a small list of strings in a large list of strings (Python)    stackoverflow.com

Hi I'm new to Python, so this may come across as a simple problem but I've been searching through Google many times and I can't seem to find a way to ...

15. Python parsing GPRMC string with CSV    stackoverflow.com

I have GPRMC string which consists of 12 comma delimited values. When I run my code it does in fact split the commas, but it prints each character in the comma ...

16. Writing List of Strings to Excel CSV File in Python    stackoverflow.com

I am trying to create a csv file that contains the contents of a list of strings in Python, using the script below. However when I check my output file, it ...

17. Searching and Matching a partof a string in a CSV file using Python    stackoverflow.com

This is a part of a large csv file which I have:

"66.35.223.128","66.35.223.143","1109647232","1109647247","AU","Australia"
"66.35.223.144","66.35.227.191","1109647248","1109648319","US","United States"
"66.35.227.192","66.35.227.207","1109648320","1109648335","JP","Japan"
"66.35.227.208","66.35.230.31","1109648336","1109648927","US","United States"
"66.35.230.32","66.35.230.47","1109648928","1109648943","AU","Australia"
"66.35.230.48","66.35.236.207","1109648944","1109650639","US","United States"
"66.35.236.208","66.35.236.223","1109650640","1109650655","AU","Australia"
"66.35.236.224","66.36.127.255","1109650656","1109688319","US","United States"
The first two columns are a range of IP addresses. I have an IP address 66.35.250.168 I need ...

18. how do write a list of string into a csv file in python?    stackoverflow.com

I have a list of strings with spaces, periods, commas and semi colons and I'm wondering how do I get these into a csv file? I need each list of strings ...

19. python: copy selected csv columns to other csv file when one header is empty    stackoverflow.com

I have some large csv file, with about 200 header names (the first one of which is empty). I want to get some chosen columns and copy them to a new output.csv ...

20. Splitting strings list according to CSV column    python-forum.org

Hi, I am currently able to split strings lists ['abc','apple','angel,'bell','boar','car','case'] into a single column How do I split or even group the list into a csv that group the list according to its starting alphabet For instance, in CSV, all the string list that starts with a will be grouped by A, all B will be grouped under B etc... A ...

21. search for string in a large csv file    python-forum.org

Hi all, I have a large csv file (330K lines~19MB). All the lines are in the same stucture: ID,Code,number,date for example: 0x2b4,1,999,22-5-2011 0x3cd,3,988,23-2-2011 . . . 0x2b4,4,909,11-5-2011 . . etc. From this file , I need to buid a new file . I want that my script will do these steps: 1.take the value of first field (ID) 2.search all the ...

22. CSV, lists, strings, Quotes...HELP!    python-forum.org

import csv infile = open("some.csv") outfile = open("out.csv", 'w') reader = csv.reader(infile, delimiter=' ', quoting=csv.QUOTE_NONE ) writer = csv.writer(outfile, delimiter=',', quoting=csv.QUOTE_MINIMAL ) . . . for l in range(22): labels.append( reader.next()) header = header + ",".join( labels[l]) headerfirsttry = "".join(str(labels)) headersecondtry = "".join(str(labels).strip('\'')) writer.writerow(labels) writer.writerow(str(header).strip('\'[]')) writer.writerow(headerfirsttry) writer.writerow(headersecondtry)

23. Help with csv module and string handling    python-forum.org

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