Przemyslaw Bak wrote:
> Hello,
>
> I many files with log data. The structure of the file is quite
> inconvenience and similar to the following example:
> Data1
> ValueA
> Data2
> ValueB
> Data3
> ValueC
> ...
> To get the values I need to find Data* and then get to the next line.
> I tried to use fileinput.input :
> ...
> for line in fileinput.input(filename):
> if line.find("Data2") >= 0:
> (now what ?)
>
> So I can find the requested line (Data2) but how to get value from the
> next line ?
lines = fileinput.input(filename)
for line in lines:
if "Data2" in line:
print line.strip(), "-->", next(lines).strip()
> Is the fileinput.input the most convenient for this type of task ?
> Maybe
> readline or readlines would be better ?
> What can you recommend ?
If you need more than a few name value pairs it pays to put the data in a
dictionary first:
# assuming that values always consist of a single line
with open(filename) as instream:
lines = (line.strip() for line in lines)
lookup = dict(zip(lines, lines))
print lookup["Data2"]
print lookup["Data3"]
Peter
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