Where can I find string.translate source?

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  • bobueland@yahoo.com
    #1

    Where can I find string.translate source?

    The module string has a function called translate. I tried to find the
    source code for that function. In:

    C:\Python24\Lib

    there is one file called

    string.py

    I open it and it says

    """A collection of string operations (most are no longer used).
    Warning: most of the code you see here isn't normally used nowadays.
    Beginning with Python 1.6, many of these functions are implemented as
    methods on the standard string object. They used to be implemented by
    a built-in module called strop, but strop is now obsolete itself."""

    Inside the file string.py I couldn't find the source code for
    translate. Where could it be?

    Tags: None
    • Mike Meyer
      #2
      Re: Where can I find string.translat e source?

      bobueland@yahoo .com writes:[color=blue]
      > Inside the file string.py I couldn't find the source code for
      > translate. Where could it be?[/color]

      Object/stringmodule.c in the python source distribution.

      <mike
      --
      Mike Meyer <mwm@mired.or g> http://www.mired.org/home/mwm/
      Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.

        Comment

        • Mike Meyer
          #3
          Re: Where can I find string.translat e source?

          bobueland@yahoo .com writes:[color=blue]
          > Inside the file string.py I couldn't find the source code for
          > translate. Where could it be?[/color]

          Object/stringmodule.c in the python source distribution.

          <mike
          --
          Mike Meyer <mwm@mired.or g> http://www.mired.org/home/mwm/
          Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.

            Comment

            • Fredrik Lundh
              #4
              Re: Where can I find string.translat e source?

              bobueland@yahoo .com wrote:
              [color=blue]
              > The module string has a function called translate. I tried to find the
              > source code for that function. In:
              >
              > C:\Python24\Lib
              >
              > there is one file called
              >
              > string.py
              >
              > I open it and it says
              >
              > """A collection of string operations (most are no longer used).
              > Warning: most of the code you see here isn't normally used nowadays.
              > Beginning with Python 1.6, many of these functions are implemented as
              > methods on the standard string object. They used to be implemented by
              > a built-in module called strop, but strop is now obsolete itself."""
              >
              > Inside the file string.py I couldn't find the source code for
              > translate. Where could it be?[/color]

              in the string.py module, of course.

              if you read that comment again, you'll notice that it says

              many of these functions are implemented as methods on the
              standard string object

              and if you search for translate in string.py, you'll also find the source
              code for the translate function

              # Character translation through look-up table.
              def translate(s, table, deletions=""):
              /... docstring snipped .../
              if deletions:
              return s.translate(tab le, deletions)
              else:
              # Add s[:0] so that if s is Unicode and table is an 8-bit string,
              # table is converted to Unicode. This means that table *cannot*
              # be a dictionary -- for that feature, use u.translate() directly.
              return s.translate(tab le + s[:0])

              which calls the translate method to do the work, just as the comment
              said.

              to find the method implementation, you have to look at the string object
              implementation. it's in the Objects directory in the source distribution.

              </F>



                Comment

                • Fredrik Lundh
                  #5
                  Re: Where can I find string.translat e source?

                  bobueland@yahoo .com wrote:
                  [color=blue]
                  > The module string has a function called translate. I tried to find the
                  > source code for that function. In:
                  >
                  > C:\Python24\Lib
                  >
                  > there is one file called
                  >
                  > string.py
                  >
                  > I open it and it says
                  >
                  > """A collection of string operations (most are no longer used).
                  > Warning: most of the code you see here isn't normally used nowadays.
                  > Beginning with Python 1.6, many of these functions are implemented as
                  > methods on the standard string object. They used to be implemented by
                  > a built-in module called strop, but strop is now obsolete itself."""
                  >
                  > Inside the file string.py I couldn't find the source code for
                  > translate. Where could it be?[/color]

                  in the string.py module, of course.

                  if you read that comment again, you'll notice that it says

                  many of these functions are implemented as methods on the
                  standard string object

                  and if you search for translate in string.py, you'll also find the source
                  code for the translate function

                  # Character translation through look-up table.
                  def translate(s, table, deletions=""):
                  /... docstring snipped .../
                  if deletions:
                  return s.translate(tab le, deletions)
                  else:
                  # Add s[:0] so that if s is Unicode and table is an 8-bit string,
                  # table is converted to Unicode. This means that table *cannot*
                  # be a dictionary -- for that feature, use u.translate() directly.
                  return s.translate(tab le + s[:0])

                  which calls the translate method to do the work, just as the comment
                  said.

                  to find the method implementation, you have to look at the string object
                  implementation. it's in the Objects directory in the source distribution.

                  </F>



                    Comment

                    • bobueland@yahoo.com
                      #6
                      Re: Where can I find string.translat e source?

                      Thanks Mike and Fredrik. In my Python installation there is no
                      directory called Objects.

                      I use Windows and I downloaded Python from
                      http://www.python.org/download/


                      As I looked closer I saw that the link
                      # Python 2.4.2 Windows installer (Windows binary -- does not
                      include source)

                      which clearly says that it doesn't include source. So in order to see
                      the source I had to download
                      # Python 2.4.2 source (for Unix or OS X compile)

                      And in that download there is a directory called Objects and there is
                      file called
                      stringobjects.c
                      where one can find the implementation of translate.

                        Comment

                        • bobueland@yahoo.com
                          #7
                          Re: Where can I find string.translat e source?

                          Thanks Mike and Fredrik. In my Python installation there is no
                          directory called Objects.

                          I use Windows and I downloaded Python from
                          http://www.python.org/download/


                          As I looked closer I saw that the link
                          # Python 2.4.2 Windows installer (Windows binary -- does not
                          include source)

                          which clearly says that it doesn't include source. So in order to see
                          the source I had to download
                          # Python 2.4.2 source (for Unix or OS X compile)

                          And in that download there is a directory called Objects and there is
                          file called
                          stringobjects.c
                          where one can find the implementation of translate.

                            Comment

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