Character Translation using Python (like the tr command)












36















Is there a way to do character translation (kind of like the tr command) using python






python







share|improve this question























  • For a Perl guy, calling it translation — as opposed to transliteration — made finding the right thing to do a bit more complicated.

    – Trenton
    Oct 16 '18 at 17:36
















36















Is there a way to do character translation (kind of like the tr command) using python






python







share|improve this question























  • For a Perl guy, calling it translation — as opposed to transliteration — made finding the right thing to do a bit more complicated.

    – Trenton
    Oct 16 '18 at 17:36














36












36








36


2






Is there a way to do character translation (kind of like the tr command) using python






python







share|improve this question














Is there a way to do character translation (kind of like the tr command) using python






python




python






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Feb 17 '09 at 6:33









hhafezhhafez

21.2k32104137




21.2k32104137













  • For a Perl guy, calling it translation — as opposed to transliteration — made finding the right thing to do a bit more complicated.

    – Trenton
    Oct 16 '18 at 17:36



















  • For a Perl guy, calling it translation — as opposed to transliteration — made finding the right thing to do a bit more complicated.

    – Trenton
    Oct 16 '18 at 17:36

















For a Perl guy, calling it translation — as opposed to transliteration — made finding the right thing to do a bit more complicated.

– Trenton
Oct 16 '18 at 17:36





For a Perl guy, calling it translation — as opposed to transliteration — made finding the right thing to do a bit more complicated.

– Trenton
Oct 16 '18 at 17:36












5 Answers
5






active

oldest

votes


















37














See string.translate



import string

"abc".translate(string.maketrans("abc", "def")) # => "def"


Note the doc's comments about subtleties in the translation of unicode strings.



Edit: Since tr is a bit more advanced, also consider using re.sub.






share|improve this answer





















  • 8





    For python3, 'module' object has no attribute 'maketrans'. Use "abc".translate(str.maketrans("abc", "def")) directly!

    – SparkAndShine
    Jul 18 '15 at 23:58





















20














If you're using python3 translate is less verbose:



>>> 'abc'.translate(str.maketrans('ac','xy'))

'xby'


Ahh.. and there is also equivalent to tr -d:



>>> "abc".translate(str.maketrans('','','b'))

'ac'


For tr -d with python2.x use an additional argument to translate function:



>>> "abc".translate(None, 'b')

'ac'





share|improve this answer





















  • 1





    is there an equivalent for tr -cd?

    – Sundeep
    Jun 27 '16 at 8:50



















5














I has developed python-tr, implemented tr algorithm.
Let's try it.



Install:



$ pip install python-tr


Example:



>>> from tr import tr

>>> tr('bn', 'cr', 'bunny')

'curry'

>>> tr('n', '', 'bunny', 'd')

'buy'

>>> tr('n', 'u', 'bunny', 'c')

'uunnu'

>>> tr('n', '', 'bunny', 's')

'buny'

>>> tr('bn', '', 'bunny', 'cd')

'bnn'

>>> tr('bn', 'cr', 'bunny', 'cs')

'brnnr'

>>> tr('bn', 'cr', 'bunny', 'ds')

'uy'



  • https://pypi.python.org/pypi/python-tr

  • https://github.com/ikegami-yukino/python-tr






share|improve this answer































    1














    In Python 2, unicode.translate() accepts ordinary mappings, ie. there's no need to import anything either:



    >>> u'abc+-'.translate({ord('+'): u'-', ord('-'): u'+', ord('b'): None})
    
u'ac-+'


    The translate() method is especially useful for swapping characters (as '+' and '-' above), which can't be done with replace(), and using re.sub() isn't very straightforward for that purpose either.



    I have to admit, however, that the repeated use of ord() doesn't make the code look like nice and tidy.






    share|improve this answer































      -4














      A simpler approach may be to use replace. e.g.



       "abc".replace("abc", "def")
      
'def'


      No need to import anything. Works in Python 2.x






      share|improve this answer



















      • 5





        it works in Python 3 as well but doesn't do what the OP is asking for.

        – iruvar
        Oct 3 '13 at 18:02






      • 1





        the translation cb to wt should transform cabbage to wattage

        – Jasen
        Sep 25 '15 at 1:14













      Your Answer






      StackExchange.ifUsing("editor", function () {
      StackExchange.using("externalEditor", function () {
      StackExchange.using("snippets", function () {
      StackExchange.snippets.init();
      });
      });
      }, "code-snippets");

      StackExchange.ready(function() {
      var channelOptions = {
      tags: "".split(" "),
      id: "1"
      };
      initTagRenderer("".split(" "), "".split(" "), channelOptions);

      StackExchange.using("externalEditor", function() {
      // Have to fire editor after snippets, if snippets enabled
      if (StackExchange.settings.snippets.snippetsEnabled) {
      StackExchange.using("snippets", function() {
      createEditor();
      });
      }
      else {
      createEditor();
      }
      });

      function createEditor() {
      StackExchange.prepareEditor({
      heartbeatType: 'answer',
      autoActivateHeartbeat: false,
      convertImagesToLinks: true,
      noModals: true,
      showLowRepImageUploadWarning: true,
      reputationToPostImages: 10,
      bindNavPrevention: true,
      postfix: "",
      imageUploader: {
      brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
      contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
      allowUrls: true
      },
      onDemand: true,
      discardSelector: ".discard-answer"
      ,immediatelyShowMarkdownHelp:true
      });


      }
      });














      draft saved

      draft discarded


















      StackExchange.ready(
      function () {
      StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f555705%2fcharacter-translation-using-python-like-the-tr-command%23new-answer', 'question_page');
      }
      );

      Post as a guest















      Required, but never shown

























      5 Answers
      5






      active

      oldest

      votes








      5 Answers
      5






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      37














      See string.translate



      import string
      
"abc".translate(string.maketrans("abc", "def")) # => "def"


      Note the doc's comments about subtleties in the translation of unicode strings.



      Edit: Since tr is a bit more advanced, also consider using re.sub.






      share|improve this answer





















      • 8





        For python3, 'module' object has no attribute 'maketrans'. Use "abc".translate(str.maketrans("abc", "def")) directly!

        – SparkAndShine
        Jul 18 '15 at 23:58


















      37














      See string.translate



      import string
      
"abc".translate(string.maketrans("abc", "def")) # => "def"


      Note the doc's comments about subtleties in the translation of unicode strings.



      Edit: Since tr is a bit more advanced, also consider using re.sub.






      share|improve this answer





















      • 8





        For python3, 'module' object has no attribute 'maketrans'. Use "abc".translate(str.maketrans("abc", "def")) directly!

        – SparkAndShine
        Jul 18 '15 at 23:58
















      37












      37








      37







      See string.translate



      import string
      
"abc".translate(string.maketrans("abc", "def")) # => "def"


      Note the doc's comments about subtleties in the translation of unicode strings.



      Edit: Since tr is a bit more advanced, also consider using re.sub.






      share|improve this answer















      See string.translate



      import string
      
"abc".translate(string.maketrans("abc", "def")) # => "def"


      Note the doc's comments about subtleties in the translation of unicode strings.



      Edit: Since tr is a bit more advanced, also consider using re.sub.







      share|improve this answer














      share|improve this answer



      share|improve this answer








      edited May 12 '12 at 10:21









      robert

      22.9k84668




      22.9k84668










      answered Feb 17 '09 at 6:40









      Richard LevasseurRichard Levasseur

      9,87854155




      9,87854155








      • 8





        For python3, 'module' object has no attribute 'maketrans'. Use "abc".translate(str.maketrans("abc", "def")) directly!

        – SparkAndShine
        Jul 18 '15 at 23:58
















      • 8





        For python3, 'module' object has no attribute 'maketrans'. Use "abc".translate(str.maketrans("abc", "def")) directly!

        – SparkAndShine
        Jul 18 '15 at 23:58










      8




      8





      For python3, 'module' object has no attribute 'maketrans'. Use "abc".translate(str.maketrans("abc", "def")) directly!

      – SparkAndShine
      Jul 18 '15 at 23:58







      For python3, 'module' object has no attribute 'maketrans'. Use "abc".translate(str.maketrans("abc", "def")) directly!

      – SparkAndShine
      Jul 18 '15 at 23:58















      20














      If you're using python3 translate is less verbose:



      >>> 'abc'.translate(str.maketrans('ac','xy'))
      
'xby'


      Ahh.. and there is also equivalent to tr -d:



      >>> "abc".translate(str.maketrans('','','b'))
      
'ac'


      For tr -d with python2.x use an additional argument to translate function:



      >>> "abc".translate(None, 'b')
      
'ac'





      share|improve this answer





















      • 1





        is there an equivalent for tr -cd?

        – Sundeep
        Jun 27 '16 at 8:50
















      20














      If you're using python3 translate is less verbose:



      >>> 'abc'.translate(str.maketrans('ac','xy'))
      
'xby'


      Ahh.. and there is also equivalent to tr -d:



      >>> "abc".translate(str.maketrans('','','b'))
      
'ac'


      For tr -d with python2.x use an additional argument to translate function:



      >>> "abc".translate(None, 'b')
      
'ac'





      share|improve this answer





















      • 1





        is there an equivalent for tr -cd?

        – Sundeep
        Jun 27 '16 at 8:50














      20












      20








      20







      If you're using python3 translate is less verbose:



      >>> 'abc'.translate(str.maketrans('ac','xy'))
      
'xby'


      Ahh.. and there is also equivalent to tr -d:



      >>> "abc".translate(str.maketrans('','','b'))
      
'ac'


      For tr -d with python2.x use an additional argument to translate function:



      >>> "abc".translate(None, 'b')
      
'ac'





      share|improve this answer















      If you're using python3 translate is less verbose:



      >>> 'abc'.translate(str.maketrans('ac','xy'))
      
'xby'


      Ahh.. and there is also equivalent to tr -d:



      >>> "abc".translate(str.maketrans('','','b'))
      
'ac'


      For tr -d with python2.x use an additional argument to translate function:



      >>> "abc".translate(None, 'b')
      
'ac'






      share|improve this answer














      share|improve this answer



      share|improve this answer








      edited Sep 12 '16 at 22:29









      Telemachus

      16.6k64778




      16.6k64778










      answered Sep 6 '09 at 12:17









      Piotr CzaplaPiotr Czapla

      14.5k2177105




      14.5k2177105








      • 1





        is there an equivalent for tr -cd?

        – Sundeep
        Jun 27 '16 at 8:50














      • 1





        is there an equivalent for tr -cd?

        – Sundeep
        Jun 27 '16 at 8:50








      1




      1





      is there an equivalent for tr -cd?

      – Sundeep
      Jun 27 '16 at 8:50





      is there an equivalent for tr -cd?

      – Sundeep
      Jun 27 '16 at 8:50











      5














      I has developed python-tr, implemented tr algorithm.
      Let's try it.



      Install:



      $ pip install python-tr


      Example:



      >>> from tr import tr
      
>>> tr('bn', 'cr', 'bunny')
      
'curry'
      
>>> tr('n', '', 'bunny', 'd')
      
'buy'
      
>>> tr('n', 'u', 'bunny', 'c')
      
'uunnu'
      
>>> tr('n', '', 'bunny', 's')
      
'buny'
      
>>> tr('bn', '', 'bunny', 'cd')
      
'bnn'
      
>>> tr('bn', 'cr', 'bunny', 'cs')
      
'brnnr'
      
>>> tr('bn', 'cr', 'bunny', 'ds')
      
'uy'



      • https://pypi.python.org/pypi/python-tr

      • https://github.com/ikegami-yukino/python-tr






      share|improve this answer




























        5














        I has developed python-tr, implemented tr algorithm.
        Let's try it.



        Install:



        $ pip install python-tr


        Example:



        >>> from tr import tr
        
>>> tr('bn', 'cr', 'bunny')
        
'curry'
        
>>> tr('n', '', 'bunny', 'd')
        
'buy'
        
>>> tr('n', 'u', 'bunny', 'c')
        
'uunnu'
        
>>> tr('n', '', 'bunny', 's')
        
'buny'
        
>>> tr('bn', '', 'bunny', 'cd')
        
'bnn'
        
>>> tr('bn', 'cr', 'bunny', 'cs')
        
'brnnr'
        
>>> tr('bn', 'cr', 'bunny', 'ds')
        
'uy'



        • https://pypi.python.org/pypi/python-tr

        • https://github.com/ikegami-yukino/python-tr






        share|improve this answer


























          5












          5








          5







          I has developed python-tr, implemented tr algorithm.
          Let's try it.



          Install:



          $ pip install python-tr


          Example:



          >>> from tr import tr
          
>>> tr('bn', 'cr', 'bunny')
          
'curry'
          
>>> tr('n', '', 'bunny', 'd')
          
'buy'
          
>>> tr('n', 'u', 'bunny', 'c')
          
'uunnu'
          
>>> tr('n', '', 'bunny', 's')
          
'buny'
          
>>> tr('bn', '', 'bunny', 'cd')
          
'bnn'
          
>>> tr('bn', 'cr', 'bunny', 'cs')
          
'brnnr'
          
>>> tr('bn', 'cr', 'bunny', 'ds')
          
'uy'



          • https://pypi.python.org/pypi/python-tr

          • https://github.com/ikegami-yukino/python-tr






          share|improve this answer













          I has developed python-tr, implemented tr algorithm.
          Let's try it.



          Install:



          $ pip install python-tr


          Example:



          >>> from tr import tr
          
>>> tr('bn', 'cr', 'bunny')
          
'curry'
          
>>> tr('n', '', 'bunny', 'd')
          
'buy'
          
>>> tr('n', 'u', 'bunny', 'c')
          
'uunnu'
          
>>> tr('n', '', 'bunny', 's')
          
'buny'
          
>>> tr('bn', '', 'bunny', 'cd')
          
'bnn'
          
>>> tr('bn', 'cr', 'bunny', 'cs')
          
'brnnr'
          
>>> tr('bn', 'cr', 'bunny', 'ds')
          
'uy'



          • https://pypi.python.org/pypi/python-tr

          • https://github.com/ikegami-yukino/python-tr







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Jan 15 '15 at 13:11









          Yukino IkegamiYukino Ikegami

          8214




          8214























              1














              In Python 2, unicode.translate() accepts ordinary mappings, ie. there's no need to import anything either:



              >>> u'abc+-'.translate({ord('+'): u'-', ord('-'): u'+', ord('b'): None})
              
u'ac-+'


              The translate() method is especially useful for swapping characters (as '+' and '-' above), which can't be done with replace(), and using re.sub() isn't very straightforward for that purpose either.



              I have to admit, however, that the repeated use of ord() doesn't make the code look like nice and tidy.






              share|improve this answer




























                1














                In Python 2, unicode.translate() accepts ordinary mappings, ie. there's no need to import anything either:



                >>> u'abc+-'.translate({ord('+'): u'-', ord('-'): u'+', ord('b'): None})
                
u'ac-+'


                The translate() method is especially useful for swapping characters (as '+' and '-' above), which can't be done with replace(), and using re.sub() isn't very straightforward for that purpose either.



                I have to admit, however, that the repeated use of ord() doesn't make the code look like nice and tidy.






                share|improve this answer


























                  1












                  1








                  1







                  In Python 2, unicode.translate() accepts ordinary mappings, ie. there's no need to import anything either:



                  >>> u'abc+-'.translate({ord('+'): u'-', ord('-'): u'+', ord('b'): None})
                  
u'ac-+'


                  The translate() method is especially useful for swapping characters (as '+' and '-' above), which can't be done with replace(), and using re.sub() isn't very straightforward for that purpose either.



                  I have to admit, however, that the repeated use of ord() doesn't make the code look like nice and tidy.






                  share|improve this answer













                  In Python 2, unicode.translate() accepts ordinary mappings, ie. there's no need to import anything either:



                  >>> u'abc+-'.translate({ord('+'): u'-', ord('-'): u'+', ord('b'): None})
                  
u'ac-+'


                  The translate() method is especially useful for swapping characters (as '+' and '-' above), which can't be done with replace(), and using re.sub() isn't very straightforward for that purpose either.



                  I have to admit, however, that the repeated use of ord() doesn't make the code look like nice and tidy.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Apr 18 '14 at 17:41









                  lenzlenz

                  3,04441832




                  3,04441832























                      -4














                      A simpler approach may be to use replace. e.g.



                       "abc".replace("abc", "def")
                      
'def'


                      No need to import anything. Works in Python 2.x






                      share|improve this answer



















                      • 5





                        it works in Python 3 as well but doesn't do what the OP is asking for.

                        – iruvar
                        Oct 3 '13 at 18:02






                      • 1





                        the translation cb to wt should transform cabbage to wattage

                        – Jasen
                        Sep 25 '15 at 1:14


















                      -4














                      A simpler approach may be to use replace. e.g.



                       "abc".replace("abc", "def")
                      
'def'


                      No need to import anything. Works in Python 2.x






                      share|improve this answer



















                      • 5





                        it works in Python 3 as well but doesn't do what the OP is asking for.

                        – iruvar
                        Oct 3 '13 at 18:02






                      • 1





                        the translation cb to wt should transform cabbage to wattage

                        – Jasen
                        Sep 25 '15 at 1:14
















                      -4












                      -4








                      -4







                      A simpler approach may be to use replace. e.g.



                       "abc".replace("abc", "def")
                      
'def'


                      No need to import anything. Works in Python 2.x






                      share|improve this answer













                      A simpler approach may be to use replace. e.g.



                       "abc".replace("abc", "def")
                      
'def'


                      No need to import anything. Works in Python 2.x







                      share|improve this answer












                      share|improve this answer



                      share|improve this answer










                      answered Oct 3 '13 at 18:00









                      Chris HaagChris Haag

                      1




                      1








                      • 5





                        it works in Python 3 as well but doesn't do what the OP is asking for.

                        – iruvar
                        Oct 3 '13 at 18:02






                      • 1





                        the translation cb to wt should transform cabbage to wattage

                        – Jasen
                        Sep 25 '15 at 1:14
















                      • 5





                        it works in Python 3 as well but doesn't do what the OP is asking for.

                        – iruvar
                        Oct 3 '13 at 18:02






                      • 1





                        the translation cb to wt should transform cabbage to wattage

                        – Jasen
                        Sep 25 '15 at 1:14










                      5




                      5





                      it works in Python 3 as well but doesn't do what the OP is asking for.

                      – iruvar
                      Oct 3 '13 at 18:02





                      it works in Python 3 as well but doesn't do what the OP is asking for.

                      – iruvar
                      Oct 3 '13 at 18:02




                      1




                      1





                      the translation cb to wt should transform cabbage to wattage

                      – Jasen
                      Sep 25 '15 at 1:14







                      the translation cb to wt should transform cabbage to wattage

                      – Jasen
                      Sep 25 '15 at 1:14




















                      draft saved

                      draft discarded




















































                      Thanks for contributing an answer to Stack Overflow!


                      • Please be sure to answer the question. Provide details and share your research!

                      But avoid …



                      • Asking for help, clarification, or responding to other answers.

                      • Making statements based on opinion; back them up with references or personal experience.


                      To learn more, see our tips on writing great answers.




                      draft saved


                      draft discarded














                      StackExchange.ready(
                      function () {
                      StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f555705%2fcharacter-translation-using-python-like-the-tr-command%23new-answer', 'question_page');
                      }
                      );

                      Post as a guest















                      Required, but never shown





















































                      Required, but never shown














                      Required, but never shown












                      Required, but never shown







                      Required, but never shown

































                      Required, but never shown














                      Required, but never shown












                      Required, but never shown







                      Required, but never shown







                      -

                      Popular posts from this blog

                      Bressuire

                      Image
                      Subprefecture and commune in Nouvelle-Aquitaine, France Bressuire Subprefecture and commune Chateau de Bressuire and the Eglise Notre-Dame Coat of arms Location of Bressuire Bressuire Show map of France Bressuire Show map of Nouvelle-Aquitaine Coordinates: 46°50′27″N 0°29′14″W  /  46.8408°N 0.4872°W  / 46.8408; -0.4872 Coordinates: 46°50′27″N 0°29′14″W  /  46.8408°N 0.4872°W  / 46.8408; -0.4872 Country France Region Nouvelle-Aquitaine Department Deux-Sèvres Arrondissement Bressuire Canton Bressuire Government  • Mayor .mw-parser-output .nobold{font-weight:normal} (2014–20) Jean Michel Bernier Area 1 180.59 km 2 (69.73 sq mi) Population (2014) 2 19,300  • Density 110/km 2 (280/sq mi) Time zone UTC+01:00 (CET)  • Summer (DST) UTC+02:00 (CEST) INSEE/Postal code 79049 /79300 Elevation 98–236 m (322–774 ft) (avg. 173 m or 568 ft) 1 French Land Register data, which exclude
                      Read more

                      Vorschmack

                      Image
                      Vorschmack Ukrainian Jewish-style vorschmack served on rye bread Course Hors d'oeuvre Region or state Eastern Europe Associated national cuisine Ashkenazi Jewish, Finnish, German, Ukrainian, Polish, Russian Main ingredients Ground meat and/or fish Cookbook: Vorschmack   Media: Vorschmack Vorschmack or forshmak (Yiddish: פֿאָרשמאַק ‎, from archaic German Vorschmack , "foretaste" [1] or "appetizer" [2] ) is an originally East European dish made of salty minced fish or meat. Different variants of this dish are especially common in Ashkenazi Jewish and Finnish cuisine. Some varieties are also known in Russian and Polish cuisine. Contents 1 In Jewish cuisine 2 In Russian cuisine 3 In Polish cuisine 4 In Finnish cuisine 5 See also 6 References In Jewish cuisine According to Gil Marks, the German name points to the possible Germanic origin of this dish. [1] William Pokhlyobkin descr
                      Read more

                      Quarantine

                      Image
                      For other uses, see Quarantine (disambiguation). Signal flag "Lima" called the "Yellow Jack" which when flown in harbor means ship is under quarantine. A simple yellow flag (also called the "Yellow Jack") had historically been used to signal quarantine (it stands for Q among signal flags), but now indicates the opposite, as a signal of a ship free of disease that requests boarding and inspection. A quarantine is used to separate and restrict the movement of people; it is 'a restraint upon the activities or communication of persons or the transport of goods designed to prevent the spread of disease or pests', for a certain period of time. [1] This is often used in connection to disease and illness, such as those who may possibly have been exposed to a communicable disease. [2] The term is often erroneously used to mean medical isolation, which is "to separate ill persons who have a communicable disease from those who are healthy
                      Read more