python newbie having strangeness

[Jørgen Cederberg]

Joe F. Blow wrote:
> The program below has been acting very weird. Last night it complained
> that I was referencing X in getline() before defining it. Of course I
> wasn't, as X is a global.
> 
> This morning I ran the exact same code again and now it says,
> "NameError: name 'convert' is not defined". HUH????? Of course it's
> defined!
> 
> What am I doing wrong? Any ideas? I'm using pythonwin and python2.3 on
> windoze xp.

Hi

yes convert is defined, but after it is being used. See below and notice 
how I have moved up before it is being used.

HTH
Jorgen Cederberg


> 
> ----------------------------------------------------------------------------------
> 
> x=1
> count=binlist=0

 > #convert ascii hex digits x & y to an integer
 > def convert(x,y):
 >     a=int(x)
 >     b=int(y)
 >     a=a<<4
 >     a=a+b
 >     return(a)

> 
> #get s19 file in list named "line"
> inp=file("c:\\download\\electron\\68hc11\\a code\\tankbot2.s19","r")
> line = inp.read()
> inp.close()
> 
> if line[x]=="0":            #is command char a "0"?
>     dig1=line[x+1]          #yes, get line length
>     dig2=line[x+2]
>     a=convert(dig1,dig2)
>     x=x+((a*2)+5)           #point to command char of next line
> 
> if line[x]=="1":
>     getline()
> print binlist
> 
> def getline():
>     global count
>     global x
>     global line
>     global binlist
>     dig1=line[x+1]
>     dig2=line[x+2]
>     a=convert(dig1,dig2)
>     x+=2
>     e=x
>     for e in range(e,e+a,2):
>         dig1=line[e+1]
>         dig2=line[e+2]
>         binlist[count]=convert(dig1,dig2)
>         count+=1
> 

> 
>