New to Python

[w]

excuse my ignorance. I cannot get this simple program to calculate
the formula.

The error message is unsupported operand type(s) str. I know the data
that I'm reading from the file is a string but I cannot convert it to
a float or int.

The code a sample form the data file are below.

# Calculate Gross Profit from SIL File

import os.path

in_file = open( "s3cga1.new ", "r")

while 1:
data = in_file.readlin e()
if not data:
break

if data[0:1] == "(":

nCost = data[ 99:106]
nPack = data[ 44:48]

nRetail = data[ 79:87]
nQuan = data[ 87:90]
nAllowance = data[ 147:154]

nGp = ( ( nRetail / nQuan ) - ( ( nCost - nAllowance) / nPack ) ) / (
nRetail / nQuan )

print nCost, nPack, nQuan, nRetail, nAllowance


EXAMPLE OF DATA FILE
(00007756725434 ,'*BREYER STRWBRY ICE ',0007,0006,' 56 OZ ','000216
',0004.95,001,2 004260,0024.430 00,0000000,0000 0.00,000,000000 0,0000000,0004. 00000,2004262,2 004282),
(00007756725433 ,'*BREYER PEACH ICE CR',0007,0006,' 56 OZ ','000224
',0004.95,001,2 004260,0024.430 00,0000000,0000 0.00,000,000000 0,0000000,0004. 00000,2004262,2 004282),

[Thomas Krüger]

Re: New to Python

w wrote:
[color=blue]
> excuse my ignorance.  I cannot get this simple program to calculate
> the formula.
>
> The error message is unsupported operand type(s) str.  I know the data
> that I'm reading from the file is a string but I cannot convert it to
> a float or int.[/color]

x = int(y)
or
x = float(y)
???

Thomas

[Jimmie Webb]

Re: New to Python

I tried x = float(nCost) but keep getting an error

ValueError: Invalid literal for float(): EATE TA


"Thomas Krüger" <thomas.krueger @gmx.net> wrote in message
news:ciq1kk$1jf $05$2@news.t-online.com...[color=blue]
> w wrote:
>[color=green]
> > excuse my ignorance. I cannot get this simple program to calculate
> > the formula.
> >
> > The error message is unsupported operand type(s) str. I know the data
> > that I'm reading from the file is a string but I cannot convert it to
> > a float or int.[/color]
>
> x = int(y)
> or
> x = float(y)
> ???
>
> Thomas[/color]

[Marc 'BlackJack' Rintsch]

Re: New to Python

In <YU%3d.179$Xy5. 164@fe61.usenet server.com>, Jimmie Webb wrote:
[color=blue]
> I tried x = float(nCost) but keep getting an error
>
> ValueError: Invalid literal for float(): EATE TA[/color]

Maybe the slice values are just wrong? Have you printed all your
variables after picking them from the string to make sure they contain
what you expect?

Ciao,
Marc 'BlackJack' Rintsch

[Jimmie Webb]

Re: New to Python

Yes, They look good to me. The nCost Value is 0022.63.
but I still get the error ValueError: Invalid literal for float(): EATE TA.

What does the 'EATE TA' mean?

Thanks!


"Marc 'BlackJack' Rintsch" <bj_666@gmx.net > wrote in message
news:pan.2004.0 9.21.20.25.53.8 79679@gmx.net.. .[color=blue]
> In <YU%3d.179$Xy5. 164@fe61.usenet server.com>, Jimmie Webb wrote:
>[color=green]
> > I tried x = float(nCost) but keep getting an error
> >
> > ValueError: Invalid literal for float(): EATE TA[/color]
>
> Maybe the slice values are just wrong? Have you printed all your
> variables after picking them from the string to make sure they contain
> what you expect?
>
> Ciao,
> Marc 'BlackJack' Rintsch[/color]

[Jere Kahanpaa]

Re: New to Python

Jimmie Webb <webbsoft2@allt el.net> wrote:[color=blue]
> I tried x = float(nCost) but keep getting an error
> ValueError: Invalid literal for float(): EATE TA[/color]

Come on, do some basic debugging! Insert 'print repr(nCost)' before the
conversation and look at what you really are feeding to the float()
function. Well, we already now it: at some point you feed the string 'EATE
TA' to float(), and it obviously cannot convert this to a number.

Jere
--
Lord, make my words as sweet as honey, for one day I may have to eat them
- Daryl Benson

[Lee Harr]

Re: New to Python

On 2004-09-21, w <webbsoft2@allt el.net> wrote:[color=blue]
> excuse my ignorance. I cannot get this simple program to calculate
> the formula.
>
> The error message is unsupported operand type(s) str. I know the data
> that I'm reading from the file is a string but I cannot convert it to
> a float or int.
>
> The code a sample form the data file are below.
>
> # Calculate Gross Profit from SIL File
>
> import os.path
>
> in_file = open( "s3cga1.new ", "r")
>
> while 1:
> data = in_file.readlin e()
> if not data:
> break
>
> if data[0:1] == "(":
>
> nCost = data[ 99:106]
> nPack = data[ 44:48]
>
> nRetail = data[ 79:87]
> nQuan = data[ 87:90]
> nAllowance = data[ 147:154]
>
> nGp = ( ( nRetail / nQuan ) - ( ( nCost - nAllowance) / nPack ) ) / (
> nRetail / nQuan )
>
> print nCost, nPack, nQuan, nRetail, nAllowance
>[/color]

Put your print statement _before_ you do any calculations, so you
can see what you are trying to calculate with ...


[color=blue]
>
> EXAMPLE OF DATA FILE
> (00007756725434 ,'*BREYER STRWBRY ICE ',0007,0006,' 56 OZ ','000216
> ',0004.95,001,2 004260,0024.430 00,0000000,0000 0.00,000,000000 0,0000000,0004. 00000,2004262,2 004282),
> (00007756725433 ,'*BREYER PEACH ICE CR',0007,0006,' 56 OZ ','000224
> ',0004.95,001,2 004260,0024.430 00,0000000,0000 0.00,000,000000 0,0000000,0004. 00000,2004262,2 004282),[/color]

[Peter Hansen]

Re: New to Python

Jimmie Webb wrote:[color=blue]
> Yes, They look good to me. The nCost Value is 0022.63.
> but I still get the error ValueError: Invalid literal for float(): EATE TA.
>
> What does the 'EATE TA' mean?[/color]
[color=blue][color=green][color=darkred]
>>> float('EATA TE')[/color][/color][/color]
Traceback (most recent call last):
File "<stdin>", line 1, in ?
ValueError: invalid literal for float(): EATA TE
[color=blue][color=green][color=darkred]
>>> float('this not a float!')[/color][/color][/color]
Traceback (most recent call last):
File "<stdin>", line 1, in ?
ValueError: invalid literal for float(): this not a float!
[color=blue][color=green][color=darkred]
>>> float ('check your data file and recheck your code')[/color][/color][/color]
Traceback (most recent call last):
File "<stdin>", line 1, in ?
ValueError: invalid literal for float(): check your data file and
recheck your code


-Peter

[Jimmie Webb]

Re: New to Python

Gee whiz. Don't jump down my throat for some oversite. It's not like I
haven't put forth an effort trying to find out the problem before posting!
Yeah, your right I was reading the "CREATE TABLE line out of the SIL file.
Thanks (I think)


"Jere Kahanpaa" <kahanpaa@sky1. astro.helsinki. fi> wrote in message
news:ciq37r$95m $1@oravannahka. helsinki.fi...[color=blue]
> Jimmie Webb <webbsoft2@allt el.net> wrote:[color=green]
> > I tried x = float(nCost) but keep getting an error
> > ValueError: Invalid literal for float(): EATE TA[/color]
>
> Come on, do some basic debugging! Insert 'print repr(nCost)' before the
> conversation and look at what you really are feeding to the float()
> function. Well, we already now it: at some point you feed the string 'EATE
> TA' to float(), and it obviously cannot convert this to a number.
>
> Jere
> --
> Lord, make my words as sweet as honey, for one day I may have to eat them
> - Daryl Benson[/color]

[Jimmie Webb]

Re: New to Python

Thanks to all the great helpful off-post comments that I received from this
group. Glad to know there are some people out there that can be "friendly"
and "helpful". It is nice to know some people will help and not call you
lazy or stupid. Sorry, I just felt like I walked into the middle of a
pit-bull attack.

-Jimmie Webb





"w" <webbsoft2@allt el.net> wrote in message
news:a1ff320f.0 409211158.29e62 56b@posting.goo gle.com...[color=blue]
> excuse my ignorance. I cannot get this simple program to calculate
> the formula.
>
> The error message is unsupported operand type(s) str. I know the data
> that I'm reading from the file is a string but I cannot convert it to
> a float or int.
>
> The code a sample form the data file are below.
>
> # Calculate Gross Profit from SIL File
>
> import os.path
>
> in_file = open( "s3cga1.new ", "r")
>
> while 1:
> data = in_file.readlin e()
> if not data:
> break
>
> if data[0:1] == "(":
>
> nCost = data[ 99:106]
> nPack = data[ 44:48]
>
> nRetail = data[ 79:87]
> nQuan = data[ 87:90]
> nAllowance = data[ 147:154]
>
> nGp = ( ( nRetail / nQuan ) - ( ( nCost - nAllowance) / nPack ) ) / (
> nRetail / nQuan )
>
> print nCost, nPack, nQuan, nRetail, nAllowance
>
>
> EXAMPLE OF DATA FILE
> (00007756725434 ,'*BREYER STRWBRY ICE ',0007,0006,' 56 OZ ','000216
>[/color]
',0004.95,001,2 004260,0024.430 00,0000000,0000 0.00,000,000000 0,0000000,0004. 0
0000,2004262,20 04282),[color=blue]
> (00007756725433 ,'*BREYER PEACH ICE CR',0007,0006,' 56 OZ ','000224
>[/color]
',0004.95,001,2 004260,0024.430 00,0000000,0000 0.00,000,000000 0,0000000,0004. 0
0000,2004262,20 04282),