[Tutor] Find multiple lines in a file

[billburns@pennswoods.net]

[Kent wrote]
> > OK, none of my suggestions gets you closer to this...the simplest way is
> > if you can read the whole file into memory. Then you can just replace
> > the strings in place and write it out again. For example:
> >
> > oldPolicies = '''<<
> >  /Policies <<
> >    /PageSize 3
> >  >>
> >
> >>> setpagedevice'''
> >
> >
> > newPolicies = 'something completely different'
> >
> > f = open(filename)
> > data = f.read()
> > f.close()
> > data.replace(oldPolicies, newPolicies)
> > f = open(filename, 'w')
> > f.write(data)
> > f.close()

Hi Kent,

I just tested the following code and it works like a champ :-)

filename = r'C:\TEST.ps'

old = '''<<
  /Policies <<
    /PageSize 3
  >>
>> setpagedevice'''

new = '''<<
 /EndPage
  {  exch pop
     0 eq
    {  gsave
          initmatrix
          save
            850 1250 moveto 45 rotate 0 setgray
            /Helvetica 25 selectfont (CAUTION - DO NOT SCALE!) true charpath .2
            setlinewidth stroke
          restore
          true
      }
     { false }
     ifelse
  } bind
>> setpagedevice'''

f = open(filename)
data = f.read()
f.close()
newData = data.replace(old, new)
f = open(filename, 'w')
f.write(newData)
f.close()

Thanks again for your help!!

Bill