{"id":1086,"date":"2013-07-26T15:58:49","date_gmt":"2013-07-26T15:58:49","guid":{"rendered":"http:\/\/blog.filipesaraiva.info\/?p=1086"},"modified":"2013-12-28T17:21:34","modified_gmt":"2013-12-28T17:21:34","slug":"python-backend-for-cantor-syntax-highlighting-tab-complete-and-interactive-mode","status":"publish","type":"post","link":"https:\/\/filipe.saraiva.tec.br\/blog\/?p=1086","title":{"rendered":"Python backend for Cantor – Syntax Highlighting, Tab Complete, and Interactive Mode"},"content":{"rendered":"

My GSoC’2013 project for development a python backend<\/a> for Cantor<\/a> reach some objectives in before weeks.<\/p>\n

Firstly I developed preliminary versions of syntax highlighting and tab complete features. This version use XML file processing to provide a basic set of keywords<\/a> and built-in functions<\/a> to these features. To activate tab complete, press Tab button after some letter.\u00a0 You can see some screenshots of these features below (click mouse right-button and enlarge it):<\/p>\n

\"python_syntax_highlighting\"<\/a><\/p>\n

A simple syntax highlighting<\/em><\/p>\n

\"python_backend\"<\/a><\/p>\n

More syntax highlighting and tab complete<\/em><\/p>\n

Next, the\u00a0preliminary version\u00a0 of the backend developed during LaKademy<\/a> was build to support python script mode<\/a>. But it would be more interesting to support python interactive mode<\/a> in Cantor console. So, to do it, I implemented preprocessing in python command before send it to python interpreter, adding some commands to simulate python interactive mode.<\/p>\n

This solution use PyRun_SimpleString<\/a> from python\/C API<\/a> to process python commands in python script mode. There is other functions from python\/C API to process python commands in interactive mode, for example, PyRun_InteractiveOne<\/a>, but this function requires the python commands in a file to process and the output of commands is a bit of hard to get. So, for now, PyRun_SimpleString + preprocessing commands is working very well.<\/p>\n

You can see in screenshots below and above that variable values and operation values are show in Cantor console without use of print command. It is a one of characteristic of python interactive mode:<\/p>\n

\"python_backend_aninhado1\"<\/a>More examples of syntax highlighting and python interact<\/em>ive mode<\/em><\/p>\n

\"python_backend_aninhado2\"<\/a><\/p>\n

More examples of syntax highlighting and python interactive mode<\/em><\/p>\n

Now I am developing a feature to list all functions and keywords from a specific python module imported during the program execution. I am using dir<\/a> command to do it. This feature will provide these keywords to use in syntax highlighting and tab complete in a dynamic way. Then, python backend will support any python module, and not scipy, numpy, and matplotlib only.<\/p>\n

Python backend is available in python-backend branch in Cantor repository<\/a>. You can test it, but remember this code is not stable and\u00a0finalized for now.<\/p>\n","protected":false},"excerpt":{"rendered":"

My GSoC’2013 project for development a python backend for Cantor reach some objectives in before weeks. Firstly I developed preliminary versions of syntax highlighting and tab complete features. This version use XML file processing to provide a basic set of keywords and built-in functions to these features. To activate tab complete, press Tab button after… Continue a ler »Python backend for Cantor – Syntax Highlighting, Tab Complete, and Interactive Mode<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[9],"tags":[58,48,11,47,101,26,51,109,104,41,52,108,80],"class_list":["post-1086","post","type-post","status-publish","format-standard","hentry","category-software-livre","tag-cantor","tag-comunidade","tag-desenvolvimento","tag-gsoc","tag-gsoc2013-python-backend","tag-kde","tag-planet-mageia-english","tag-planet-python","tag-planet-scipy","tag-planeta-psl-pi","tag-planetkde-english","tag-python","tag-python-backend"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p1p2Jh-hw","jetpack_sharing_enabled":true,"jetpack_likes_enabled":false,"_links":{"self":[{"href":"https:\/\/filipe.saraiva.tec.br\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1086","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/filipe.saraiva.tec.br\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/filipe.saraiva.tec.br\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/filipe.saraiva.tec.br\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/filipe.saraiva.tec.br\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1086"}],"version-history":[{"count":2,"href":"https:\/\/filipe.saraiva.tec.br\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1086\/revisions"}],"predecessor-version":[{"id":1149,"href":"https:\/\/filipe.saraiva.tec.br\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1086\/revisions\/1149"}],"wp:attachment":[{"href":"https:\/\/filipe.saraiva.tec.br\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1086"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/filipe.saraiva.tec.br\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1086"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/filipe.saraiva.tec.br\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1086"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}