i am want to read data from the csv that i wrote using python csv module but apart from filed names and row count i am unable to read rest of the data

[sjeik_appie at hotmail.com]

   On 15 Apr 2020 10:28, Peter Otten <__peter__ at web.de> wrote:

     sjeik_appie at hotmail.com wrote:

     >    On 12 Apr 2020 12:30, Peter Otten <__peter__ at web.de> wrote:
     >
     >      Rahul Gupta wrote:
     >
     >      >for line in enumerate(csv_reader):
     >      >print(line[csv_reader.fieldnames[1]])
     >
     >      enumerate() generates (index, line) tuples that you need to
     unpack:
     >
     >      for index, line in enumerate(csv_reader):
     >      print(line[csv_reader.fieldnames[1]])
     >
     >    ==》 Shouldn't that be, e.g:
     >    print( line[csv_reader.fieldnames[1].index()] )

     No. Remember that the OP used a DictReader. If you want to clean up the
     original code you can use a csv.reader

     csv_reader = csv.reader(csv_file)
     fieldnames = next(csv_reader)
     for row in csv_reader:
         print(row[1])

     but my assumption was that

     >      print(line[csv_reader.fieldnames[1]])

     wasn't the final code, only something to get things working.

     >    Or maybe:
     >    cols = csv_reader.fieldnames
     >    print( [[val for val, col in zip(record, cols) if col in
     ['somecol']]
     >    for record in csv_reader])
     >    ?

     This is ugly and complex. It can be simplified to

     num_rows = sum(1 for _ in csv_reader)
     print([["somecol"]] * num_rows)

     Why would you want to this?

   ===》 I thought the OP wanted to take a subset of the columns in his data.
   In my example I intended to select one column, but with code that cpuld
   easily be extended to a selection of multiple columns. Call it "pruning"
   of the lists of lists