Here. Reads from stdin and writes to stdout. Should do what you want.
Don't forget to make it executable. Save to a file, e.g. "type_munger.py"
then:
chmod +x type_munger.py
then:
./type_munger.py < input_file.txt > output_file.txt
Your line terminators, whatever they are (\n or \r\n or \r) are
stripped off and whatever line terminators are native to the system
you are running the script on will be used.
#!/usr/bin/env python
from sys import stdin
lines = stdin.readlines() # suck up all the lines
state = 'normal'
for line in lines:
line = line.rstrip() # Strip whitespace off the end
if line == "Type=0x21":
state = "seen 0x21"
continue
if state == "seen 0x21":
if line[9:11] == "00":
print "Type=0x22"
else:
print "Type=0x21"
state = 'normal'
print line
On 25/10/05, Tom Munro Glass <[EMAIL PROTECTED]> wrote:
> I've got several large files that require some repetitive multiline search and
> replace operations, and I feel sure that sed can do this, but I can't figure
> out how to do it.
>
> The pattern I'm searching for in the input file is "Type=0x21" followed by
> "Label=abcde" on the next line, where abcde is a 5 character number with
> leading spaces. If abcde is a multiple of 100, (d=0, e=0) I want to replace
> the first line with "Type=0x22", and add a third line "EndLevel=1"
>
> For example:
>
> BEFORE: AFTER:
> Type=0x21 Type=0x21 # No change required because
> Label= 120 Label= 120 # Label not multiple of 100
> blah, blah blah, blah
>
> Type=0x21 Type=0x22 # Change Type value
> Label= 100 Label= 100
> blah, blah EndLevel=1 # Insert extra line
> blah, blah
>
> Type=0x21 Type=0x22 # Same as previous except
> Label= 2200 Label= 2200 # different value for Label
> blah, blah EndLevel=1
> blah, blah
>
> The bit that's got me stumped is how to handle the Label line. Can someone
> please give me hint how to do this?
>
> Tom
>
