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Python script not working on windows 7 but works fine on linux

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  Python script not working on windows 7 but works fine on linux io <maroso@libero.it> - 2013-03-04 19:06 +0000
    Re: Python script not working on windows 7 but works fine on linux Christian Gollwitzer <auriocus@gmx.de> - 2013-03-04 20:20 +0100
      Re: Python script not working on windows 7 but works fine on linux io <maroso@libero.it> - 2013-03-04 19:58 +0000
    Re: Python script not working on windows 7 but works fine on linux ian douglas <iandouglas736@gmail.com> - 2013-03-04 11:20 -0800
      Re: Python script not working on windows 7 but works fine on linux io <maroso@libero.it> - 2013-03-04 19:59 +0000
        Re: Python script not working on windows 7 but works fine on linux Chris Angelico <rosuav@gmail.com> - 2013-03-05 07:56 +1100
      Re: Python script not working on windows 7 but works fine on linux Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-03-05 01:58 +0000
        Re: Python script not working on windows 7 but works fine on linux Andrew Berg <bahamutzero8825@gmail.com> - 2013-03-04 20:25 -0600
      Re: Python script not working on windows 7 but works fine on linux 88888 Dihedral <dihedral88888@googlemail.com> - 2013-03-04 18:58 -0800
      Re: Python script not working on windows 7 but works fine on linux 88888 Dihedral <dihedral88888@googlemail.com> - 2013-03-04 18:58 -0800
    Re: Python script not working on windows 7 but works fine on linux Wolfgang Strobl <news4@mystrobl.de> - 2013-03-04 20:30 +0100
    Re: Python script not working on windows 7 but works fine on linux Terry Reedy <tjreedy@udel.edu> - 2013-03-04 16:19 -0500

#40474 — Python script not working on windows 7 but works fine on linux

The following scripts are working fine on linux but, using the same 
version, can't work on windows because i receive the following message:

Script:


import json
import urllib
import csv

url = "http://bitcoincharts.com/t/markets.json"
response = urllib.urlopen(url);
data = json.loads(response.read())

f = open("/home/io/btc_trading/markets.csv","wb")
c = csv.writer(f)

#apre un file di testo e legge il contenuto del file inserendolo in una 
stringa
esclusioni_file = open('/home/io/btc_trading/exclusions.txt','r')
esclusioni = []

for line in esclusioni_file:
     esclusioni.append(line.strip())
#print(esclusioni)


# write headers
c.writerow(["Currency","Symbol","Bid", "Ask", "Volume"])

for d in data :
    if d["currency"] <> "SLL":  #esclude la valuta di secondlife SLL
        if d["bid"] is not None and d["ask"] is not None:
            if d["symbol"] not in esclusioni:
                #print d["symbol"]
                c.writerow([str(d["currency"]),str(d["symbol"]),str(d
["bid"]),str(d["ask"]),str(d["currency_volume"])])
    #esclusioni.close()

Windows error :

Traceback (most recent call last):
  File "C:\btc_trading\scripts
\import_json_2_csv_from_web_and_exclusions.py", line 10, in <module>
    f = open("/home/io/btc_trading/markets.csv","wb")
IOError: [Errno 2] No such file or directory: '/home/io/btc_trading/
markets.csv'
>>> 

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#40475

Am 04.03.13 20:06, schrieb io:
> The following scripts are working fine on linux but, using the same
> version, can't work on windows because i receive the following message:
>

snip

> f = open("/home/io/btc_trading/markets.csv","wb")


> Windows error :
>
> Traceback (most recent call last):
>    File "C:\btc_trading\scripts
> \import_json_2_csv_from_web_and_exclusions.py", line 10, in <module>
>      f = open("/home/io/btc_trading/markets.csv","wb")
> IOError: [Errno 2] No such file or directory: '/home/io/btc_trading/
> markets.csv'
>>>>


Are you actually reading that error message? You have an absolute path 
in script! This /home/io... would something like C:/btc_trading/... on 
Windows.

This is not a Python question, it is a Linux/Windows question. Ask your 
local IT guy.

	Christian

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#40478

Thanks, .... btw ...i'm the IT guy!

I was missing the double slash as dougas suggested!++Thanks anyway.

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#40476

On 03/04/2013 11:06 AM, io wrote:
> esclusioni_file = open('/home/io/btc_trading/exclusions.txt','r')
>
> Windows error :
>
> Traceback (most recent call last):
>    File "C:\btc_trading\scripts
> \import_json_2_csv_from_web_and_exclusions.py", line 10, in <module>
>      f = open("/home/io/btc_trading/markets.csv","wb")
> IOError: [Errno 2] No such file or directory: '/home/io/btc_trading/
> markets.csv'

The error tells you everything you need to know: the file system has no 
path/file called "/home/io/btc_trading/markets.csv"

I imagine your CSV file lives in a different location on your Windows 7 
system (which also uses back-slashes '\' instead of forward-slashes '/', 
so you'll need to maybe do a try/except around the open() call to open a 
Windows path like open("c:\\users\\io\\Documents\\markets.csv") or 
whatever. OR you'll need to do some OS detection ahead of time to set 
the file path properly.

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#40479

Genius!

The code i posted was an example. 
My real code was c:\btc_trading ....

i was just missing the double slashes!

Thanks , thankyou very much.

:-)

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#40480

On Tue, Mar 5, 2013 at 6:59 AM, io <maroso@libero.it> wrote:
> Genius!
>
> The code i posted was an example.
> My real code was c:\btc_trading ....
>
> i was just missing the double slashes!
>
> Thanks , thankyou very much.
>
> :-)

Even on Windows, you can use / as a directory separator. This
generally saves you the trouble of switching to \\ for everything;
though still, absolute paths are often wrong. But at least you can use
relative paths safely!

ChrisA

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#40492

On Mon, 04 Mar 2013 11:20:28 -0800, ian douglas wrote:

> The error tells you everything you need to know: the file system has no
> path/file called "/home/io/btc_trading/markets.csv"
> 
> I imagine your CSV file lives in a different location on your Windows 7
> system (which also uses back-slashes '\' instead of forward-slashes '/',

Windows understands forward slashes in paths too. You can make your code 
(almost) platform-independent, and avoid a lot of problems with unescaped 
backslashes, by always using forward slashes in paths.



-- 
Steven

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#40493

On 2013.03.04 19:58, Steven D'Aprano wrote:
> Windows understands forward slashes in paths too. You can make your code 
> (almost) platform-independent, and avoid a lot of problems with unescaped 
> backslashes, by always using forward slashes in paths.
Or use os.path.join, the entire purpose of which is to create suitable
paths dynamically.

-- 
CPython 3.3.0 | Windows NT 6.2.9200 / FreeBSD 9.1

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#40496

On Tuesday, March 5, 2013 3:20:28 AM UTC+8, ian douglas wrote:
> On 03/04/2013 11:06 AM, io wrote:
> 
> > esclusioni_file = open('/home/io/btc_trading/exclusions.txt','r')
> 
> >
> 
> > Windows error :
> 
> >
> 
> > Traceback (most recent call last):
> 
> >    File "C:\btc_trading\scripts
> 
> > \import_json_2_csv_from_web_and_exclusions.py", line 10, in <module>
> 
> >      f = open("/home/io/btc_trading/markets.csv","wb")
> 
> > IOError: [Errno 2] No such file or directory: '/home/io/btc_trading/
> 
> > markets.csv'
> 
> 
> 
> The error tells you everything you need to know: the file system has no 
> 
> path/file called "/home/io/btc_trading/markets.csv"
> 
> 
> 
> I imagine your CSV file lives in a different location on your Windows 7 
> 
> system (which also uses back-slashes '\' instead of forward-slashes '/', 
> 
> so you'll need to maybe do a try/except around the open() call to open a 
> 
> Windows path like open("c:\\users\\io\\Documents\\markets.csv") or 
> 
> whatever. OR you'll need to do some OS detection ahead of time to set 
> 
> the file path properly.

Well, I'll suggest an old trick I did long time ago to resolve
the platform dependent problem in python.

Just write a generator as a buffered input method to work under some
file of some OS correctly first, then you can pass the generator which
is tested rigorously to act properly in the function or the object which will
use the generator to sip up the data to perform jobs.

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#40497

On Tuesday, March 5, 2013 3:20:28 AM UTC+8, ian douglas wrote:
> On 03/04/2013 11:06 AM, io wrote:
> 
> > esclusioni_file = open('/home/io/btc_trading/exclusions.txt','r')
> 
> >
> 
> > Windows error :
> 
> >
> 
> > Traceback (most recent call last):
> 
> >    File "C:\btc_trading\scripts
> 
> > \import_json_2_csv_from_web_and_exclusions.py", line 10, in <module>
> 
> >      f = open("/home/io/btc_trading/markets.csv","wb")
> 
> > IOError: [Errno 2] No such file or directory: '/home/io/btc_trading/
> 
> > markets.csv'
> 
> 
> 
> The error tells you everything you need to know: the file system has no 
> 
> path/file called "/home/io/btc_trading/markets.csv"
> 
> 
> 
> I imagine your CSV file lives in a different location on your Windows 7 
> 
> system (which also uses back-slashes '\' instead of forward-slashes '/', 
> 
> so you'll need to maybe do a try/except around the open() call to open a 
> 
> Windows path like open("c:\\users\\io\\Documents\\markets.csv") or 
> 
> whatever. OR you'll need to do some OS detection ahead of time to set 
> 
> the file path properly.

Well, I'll suggest an old trick I did long time ago to resolve
the platform dependent problem in python.

Just write a generator as a buffered input method to work under some
file of some OS correctly first, then you can pass the generator which
is tested rigorously to act properly in the function or the object which will
use the generator to sip up the data to perform jobs.

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#40477

io <maroso@libero.it>:

>The following scripts are working fine on linux but, using the same 
>version, can't work on windows because i receive the following message:

Thats because there is No such file or directory: '/home/io/btc_trading/
on that Windows PC.


-- 
Wir danken für die Beachtung aller Sicherheitsbestimmungen

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#40482

On 3/4/2013 2:20 PM, ian douglas wrote:

> I imagine your CSV file lives in a different location on your Windows 7
> system (which also uses back-slashes '\' instead of forward-slashes '/',

Forward slashes work fine on Windows except for invoking the executable 
at a Command Prompt command line, where '/' marks an option.

 >>> open('/programs/python33/python.exe')
<_io.TextIOWrapper name='/programs/python33/python.exe' mode='r' 
encoding='cp1252'>

-- 
Terry Jan Reedy

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