Actually, I am extracting data from other site in json format and I want to
put it in my database and when I extract data again then I want to compare
last json file, if these are same then no issue otherwise i will add new
data in database, so here may be every time data can be changed or may be
not so I think sorting is required, but if i compare line by line that will
be good, I am thinking in this way...
On Mon, May 27, 2013 at 10:21 AM, rusi <rustompm...@gmail.com> wrote:
> On May 27, 9:32 am, Avnesh Shakya <avnesh.n...@gmail.com> wrote:
> > hi,
> > how to compare two json file line by line using python? Actually I am
> doing it in this way..
> >
> > import simplejson as json
> > def compare():
> > newJsonFile= open('newData.json')
> > lastJsonFile= open('version1.json')
> > newLines = newJsonFile.readlines()
> > print newLines
> > sortedNew = sorted([repr(x) for x in newJsonFile])
> > sortedLast = sorted([repr(x) for x in lastJsonFile])
> > print(sortedNew == sortedLast)
> >
> > compare()
> >
> > But I want to compare line by line and value by value. but i found that
> json data is unordered data, so how can i compare them without sorting it.
> please give me some idea about it. I am new for it.
> > I want to check every value line by line.
> >
> > Thanks
>
> It really depends on what is your notion that the two files are same
> or not.
>
> For example does extra/deleted non-significant white-space matter?
>
> By and large there are two approaches:
> 1. Treat json as serialized python data-structures, (and so) read in
> the data-structures into python and compare there
>
> 2. Ignore the fact that the json file is a json file; just treat it as
> text and use string compare operations
>
> Naturally there could be other considerations: the files could be huge
> and so you might want some hybrid of json and text approaches
> etc etc
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