{"id":268,"date":"2017-08-15T22:58:50","date_gmt":"2017-08-16T03:58:50","guid":{"rendered":"http:\/\/bluegalaxy.info\/codewalk\/?p=268"},"modified":"2018-07-05T19:56:48","modified_gmt":"2018-07-06T00:56:48","slug":"python-and-perl-a-comparison-of-the-language-basics","status":"publish","type":"post","link":"https:\/\/bluegalaxy.info\/codewalk\/2017\/08\/15\/python-and-perl-a-comparison-of-the-language-basics\/","title":{"rendered":"Python and Perl: A comparison of the language basics"},"content":{"rendered":"

In this table I will compare some basic programming syntax and conventions between the Python and Perl programming languages.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Programming element<\/th>\nPython<\/th>\nPerl<\/th>\n<\/tr>\n
Creating a variable that contains an int:<\/strong><\/td>\nage = 25<\/code><\/td>\n%age = 25;<\/code><\/td>\n<\/tr>\n
Creating a variable that contains a float:<\/strong><\/td>\nprobability = 0.62<\/code><\/td>\n%probability = 0.62;<\/code><\/td>\n<\/tr>\n
Creating a variable that contains a string:<\/strong>
\nPython supports single, double, and triple quotes. Perl supports only double quotes.<\/td>\n		state = 'North Dakota'<\/code>
\nstate = \"North Dakota\"<\/code>
\nstate = \"\"\"North Dakota\"\"\"<\/code><\/td>\n		%state = \"North Dakota\";<\/code><\/td>\n<\/tr>\n
Denoting string literals:<\/strong>
\nPython uses an ‘r’ in front of the string. Single quotes always mean string literal in Perl. Double quotes in Perl allow for interpolations such as ‘\\n’, ‘\\t’, etc..<\/td>\n		path = r'\\path\\to\\some\\files'<\/code>
\npath = r\"\\path\\to\\some\\files\"<\/code>
\npath = r\"\"\"\\path\\to\\some\\files\"\"\"<\/code><\/td>\n		%path = '\\path\\to\\some\\files';<\/code><\/td>\n<\/tr>\n
String Concatenation:<\/strong><\/td>\ngreeting = \"Hello\" + \" world\"<\/code><\/td>\n$greeting = \"Hello\" . \" world\";<\/code><\/td>\n<\/tr>\n
Creating a list or array:<\/strong><\/td>\nfruit_list = ['apple', 'banana', 'cherry']<\/code><\/td>\n@fruit_list = (\"apple\", \"banana\", \"cherry\");<\/code><\/td>\n<\/tr>\n
Getting the length of a list or array:<\/strong><\/td>\nlength = len(fruit_list)<\/code><\/td>\n$length = @fruit_list;<\/code><\/td>\n<\/tr>\n
Creating a dictionary or hash:<\/strong><\/td>\nfruit = {'a':'apple', 'b':'banana', 'c':'cherry'}<\/code><\/td>\n%fruit = (\"a\", \"apple\", \"b\", \"banana\", \"c\", \"cherry\");<\/code>
\n%fruit = (\"a\" => \"apple\", \"b\" => \"banana\", \"c\" => \"cherry\");<\/code><\/td>\n<\/tr>\n
Getting keys and values from a dictionary or hash:<\/strong><\/td>\nfruit_keys = fruit.keys()<\/code>
\nfruit_values = fruit.values()<\/code><\/td>\n		@fruit_keys = keys %fruit;<\/code>
\n@fruit_values = values %fruit;<\/code><\/td>\n<\/tr>\n
Adding and deleting key-value pairs to a dictionary or hash:<\/strong><\/td>\nfruit['o'] = 'orange'<\/code>
\ndel fruit['c']<\/code><\/td>\n		$fruit{'o'} = \"orange\";<\/code>
\ndelete $fruit{'c'};<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Python was invented in the late 1980s (1989) by Guido van Rossum. Ideas for Python were adopted from Modula-3 and Lisp. Perl was also invented in the late 1980s (1987) by Larry Wall as a general-purpose Unix scripting language to make report processing easier. Perl is an acronym that stands for P<\/strong>ractical E<\/strong>xtraction R<\/strong>eport L<\/strong>anguage.<\/p>\n","protected":false},"excerpt":{"rendered":"

In this table I will compare some basic programming syntax and conventions between the Python and Perl programming languages. Programming element Python Perl Creating a variable that contains an int: age = 25 %age = 25; Creating a variable that contains a float: probability = 0.62 %probability = 0.62; Creating a variable that contains a … Continue reading Python and Perl: A comparison of the language basics<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[23,4],"class_list":["post-268","post","type-post","status-publish","format-standard","hentry","category-perl-language","tag-perl","tag-python"],"_links":{"self":[{"href":"https:\/\/bluegalaxy.info\/codewalk\/wp-json\/wp\/v2\/posts\/268","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bluegalaxy.info\/codewalk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bluegalaxy.info\/codewalk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bluegalaxy.info\/codewalk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bluegalaxy.info\/codewalk\/wp-json\/wp\/v2\/comments?post=268"}],"version-history":[{"count":61,"href":"https:\/\/bluegalaxy.info\/codewalk\/wp-json\/wp\/v2\/posts\/268\/revisions"}],"predecessor-version":[{"id":2111,"href":"https:\/\/bluegalaxy.info\/codewalk\/wp-json\/wp\/v2\/posts\/268\/revisions\/2111"}],"wp:attachment":[{"href":"https:\/\/bluegalaxy.info\/codewalk\/wp-json\/wp\/v2\/media?parent=268"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bluegalaxy.info\/codewalk\/wp-json\/wp\/v2\/categories?post=268"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bluegalaxy.info\/codewalk\/wp-json\/wp\/v2\/tags?post=268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}