appending file

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  • Kuo
    #1

    appending file

    Hi,
    I'm trying to read a file (fileA) and append to another file(fileB).
    However, I always get "^M" at the end. Does anyone know why ? Here is my
    code ?

    os.system("../syn/pin_assign.pl customer_netlis t.txt")
    shutil.copy("../fileB", "fileB")
    ucf = open("fileB", "a")
    pin = open("fileA", "r")
    ucf.write(pin.r ead())
    ucf.close;
    pin.close;
    sys.exit(0);

    Here is what I get.

    # FPGA CLOCK^M
    NET "SYSCLK_A" loc = N16 | TNM_NET = SYSCLK_A;^M
    NET "SYSCLK_AN" loc = M16 | TNM_NET = SYSCLK_A;^M


    Note that if I don't do "ucf.write(pin. read())", everything is ok.

    Thanks for any help.
    Tags: None
    • Bruno Desthuilliers
      #2
      Re: appending file

      Kuo a écrit :
      Hi,
      I'm trying to read a file (fileA) and append to another file(fileB).
      However, I always get "^M" at the end. Does anyone know why ? Here is my
      code ?
      >
      os.system("../syn/pin_assign.pl customer_netlis t.txt")
      shutil.copy("../fileB", "fileB")
      ucf = open("fileB", "a")
      pin = open("fileA", "r")
      ucf.write(pin.r ead())
      ucf.close;
      pin.close;
      sys.exit(0);
      >
      Here is what I get.
      >
      # FPGA CLOCK^M
      NET "SYSCLK_A" loc = N16 | TNM_NET = SYSCLK_A;^M
      NET "SYSCLK_AN" loc = M16 | TNM_NET = SYSCLK_A;^M
      >
      Looks like a problem with newline format. Googling for "universal
      newline" may be a good start.

        Comment

        • Thomas Jollans
          #3
          Re: appending file

          On Friday 29 June 2007, Kuo wrote:
          Hi,
          I'm trying to read a file (fileA) and append to another file(fileB).
          However, I always get "^M" at the end. Does anyone know why ? Here is my
          code ?
          I can't help you on your problem, but
          ucf.close;
          pin.close;
          these statements don't do anything. You'll want

          ucf.close()
          pin.close()
          sys.exit(0);
          >
          Here is what I get.
          >
          # FPGA CLOCK^M
          NET "SYSCLK_A" loc = N16 | TNM_NET = SYSCLK_A;^M
          NET "SYSCLK_AN" loc = M16 | TNM_NET = SYSCLK_A;^M
          >
          >
          Note that if I don't do "ucf.write(pin. read())", everything is ok.
          >
          Thanks for any help.


          --
          Regards, Thomas Jollans
          GPG key: 0xF421434B may be found on various keyservers, eg pgp.mit.edu
          Hacker key <http://hackerkey.com/>:
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          -----BEGIN PGP SIGNATURE-----
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            Comment

            • Falcolas
              #4
              Re: appending file

              On Jun 29, 1:04 pm, Kuo <chinchia....@s bcglobal.comwro te:
              # FPGA CLOCK^M
              NET "SYSCLK_A" loc = N16 | TNM_NET = SYSCLK_A;^M
              NET "SYSCLK_AN" loc = M16 | TNM_NET = SYSCLK_A;^M
              I see those bloody ^M's anytime I have to deal with a DOS file (since
              it's the carrage return \r character). Is 'pin' a DOS generated file?
              If you want to deal with a file which contains them, look for and get
              rid of the \r character.

                Comment

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