Parameter Passing - String Variable Truncated ?

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  • goldtech
    #1

    Parameter Passing - String Variable Truncated ?

    Hi,

    I'm passing what I think is a string parameter to another Python
    program (spawn.py) - see the code snip below. But only the counter
    part gets printed to a log file via spawn.py. Yet the echo print to
    the output window shows the whole string with the fc part. Better
    explained below I hope, there's the calling .py and the spawn
    script .py:
    ....snip...
    while fc:
    counter = counter + 1
    fc_cntr = str(counter) + ' : ' + fc
    print fc_cntr + '\n' # Print to Pythonwin interactive window -
    eg. "1 : New York" - all is printed OK

    arglist = []
    arglist.append( pythonPath)
    arglist.append( spawn_script)
    arglist.append( fc_cntr) # This gets sent to the spawn_script but
    only "1" gets printed

    os.spawnv(os.P_ WAIT, pythonPath, arglist)
    fc = fcs.next()
    ....
    --------------------------
    ## the spawn_script
    import win32com.client , sys, os, time, re

    in_featclass = sys.argv[1]
    handle = open('C:\\log_f ile.txt', 'a')
    handle.write(in _featclass + "\n") # ONLY the counter part gets printed
    to the log file! Why?
    --------------------------

    Thanks, for help.

    Tags: None
    • John Machin
      #2
      Re: Parameter Passing - String Variable Truncated ?

      On Sep 1, 9:54 am, goldtech <goldt...@world post.comwrote:
      Hi,
      >
      I'm passing what I think is a string parameter to another Python
      program (spawn.py) - see the code snip below. But only the counter
      part gets printed to a log file via spawn.py. Yet the echo print to
      the output window shows the whole string with the fc part. Better
      explained below I hope, there's the calling .py and the spawn
      script .py:
      ...snip...
      while fc:
      counter = counter + 1
      fc_cntr = str(counter) + ' : ' + fc
      print fc_cntr + '\n' # Print to Pythonwin interactive window -
      eg. "1 : New York" - all is printed OK
      >
      arglist = []
      arglist.append( pythonPath)
      arglist.append( spawn_script)
      arglist.append( fc_cntr) # This gets sent to the spawn_script but
      only "1" gets printed
      >
      os.spawnv(os.P_ WAIT, pythonPath, arglist)
      fc = fcs.next()
      ...
      --------------------------
      ## the spawn_script
      import win32com.client , sys, os, time, re
      >
      in_featclass = sys.argv[1]
      handle = open('C:\\log_f ile.txt', 'a')
      handle.write(in _featclass + "\n") # ONLY the counter part gets printed
      to the log file! Why?
      --------------------------
      Try handle.write(re pr(sys.argv[1:]) + "\n")
      and come back with your conclusions ... unless of course someone has
      spoonfed you in the meantime.

      Another clue: write yourself a little arg-dumper script and try
      running it in a Command Prompt window.
      8<---
      import sys
      for x, arg in enumerate(sys.a rgv):
      print x, repr(arg)
      8<---
      HTH,
      John

        Comment

        • Steve Holden
          #3
          Re: Parameter Passing - String Variable Truncated ?

          goldtech wrote:
          Hi,
          >
          I'm passing what I think is a string parameter to another Python
          program (spawn.py) - see the code snip below. But only the counter
          part gets printed to a log file via spawn.py. Yet the echo print to
          the output window shows the whole string with the fc part. Better
          explained below I hope, there's the calling .py and the spawn
          script .py:
          ...snip...
          while fc:
          counter = counter + 1
          fc_cntr = str(counter) + ' : ' + fc
          print fc_cntr + '\n' # Print to Pythonwin interactive window -
          eg. "1 : New York" - all is printed OK
          >
          arglist = []
          arglist.append( pythonPath)
          arglist.append( spawn_script)
          arglist.append( fc_cntr) # This gets sent to the spawn_script but
          only "1" gets printed
          >
          os.spawnv(os.P_ WAIT, pythonPath, arglist)
          fc = fcs.next()
          ...
          --------------------------
          ## the spawn_script
          import win32com.client , sys, os, time, re
          >
          in_featclass = sys.argv[1]
          Try

          in_featclass = sys.argv[1:]

          to collect all the arguments. At the moment I suspect some shell
          argument processing is intervening, splitting your "N : something" into
          multiple arguments.
          handle = open('C:\\log_f ile.txt', 'a')
          handle.write(in _featclass + "\n") # ONLY the counter part gets printed
          to the log file! Why?
          --------------------------
          >
          Thanks, for help.
          >
          regards
          Steve
          --
          Steve Holden +1 571 484 6266 +1 800 494 3119
          Holden Web LLC/Ltd http://www.holdenweb.com
          Skype: holdenweb http://del.icio.us/steve.holden
          --------------- Asciimercial ------------------
          Get on the web: Blog, lens and tag the Internet
          Many services currently offer free registration
          ----------- Thank You for Reading -------------

            Comment

            • Steve Holden
              #4
              Re: Parameter Passing - String Variable Truncated ?

              Steve Holden wrote:
              [...]
              >in_featclass = sys.argv[1]
              >
              Try
              >
              in_featclass = sys.argv[1:]
              >
              Sorry, that should have been

              in_featclass = " ".join(sys. argv[1:])+"\n"

              regards
              Steve
              --
              Steve Holden +1 571 484 6266 +1 800 494 3119
              Holden Web LLC/Ltd http://www.holdenweb.com
              Skype: holdenweb http://del.icio.us/steve.holden
              --------------- Asciimercial ------------------
              Get on the web: Blog, lens and tag the Internet
              Many services currently offer free registration
              ----------- Thank You for Reading -------------

                Comment

                • Steve Holden
                  #5
                  Re: Parameter Passing - String Variable Truncated ?

                  Steve Holden wrote:
                  [...]
                  >in_featclass = sys.argv[1]
                  >
                  Try
                  >
                  in_featclass = sys.argv[1:]
                  >
                  Sorry, that should have been

                  in_featclass = " ".join(sys. argv[1:])+"\n"

                  regards
                  Steve
                  --
                  Steve Holden +1 571 484 6266 +1 800 494 3119
                  Holden Web LLC/Ltd http://www.holdenweb.com
                  Skype: holdenweb http://del.icio.us/steve.holden
                  --------------- Asciimercial ------------------
                  Get on the web: Blog, lens and tag the Internet
                  Many services currently offer free registration
                  ----------- Thank You for Reading -------------

                    Comment

                    • goldtech
                      #6
                      Re: Parameter Passing - String Variable Truncated ?

                      snip...
                      --------------------------
                      >
                      Try handle.write(re pr(sys.argv[1:]) + "\n")
                      and come back with your conclusions ... unless of course someone has
                      spoonfed you in the meantime.
                      >
                      Another clue: write yourself a little arg-dumper script and try
                      running it in a Command Prompt window.
                      8<---
                      import sys
                      for x, arg in enumerate(sys.a rgv):
                      print x, repr(arg)
                      8<---
                      HTH,
                      John
                      It's a list.

                      ....
                      ['5', ':', 'Alaska.shp']
                      ['6', ':', 'Arizona.shp']
                      ['7', ':', 'Arkansas.shp']
                      ['8', ':', 'California.shp ']
                      ['9', ':', 'Colorado.shp']
                      ['10', ':', 'Connecticut.sh p']
                      ['11', ':', 'Delaware.shp']
                      ['12', ':', 'District', 'of', 'Columbia.shp']
                      ['13', ':', 'Florida.shp']
                      ['14', ':', 'West', 'Virginia.shp']
                      ['15', ':', 'Wisconsin.shp']
                      ['16', ':', 'Wyoming.shp']

                      Thanks,
                      Lee G.

                        Comment

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