{"id":126,"date":"2020-06-10T19:40:29","date_gmt":"2020-06-10T17:40:29","guid":{"rendered":"https:\/\/www.pythonparatodo.com\/?p=126"},"modified":"2020-06-10T19:40:31","modified_gmt":"2020-06-10T17:40:31","slug":"funciones-lambda","status":"publish","type":"post","link":"https:\/\/www.pythonparatodo.com\/?p=126","title":{"rendered":"Funciones lambda"},"content":{"rendered":"\n<p>Una funci\u00f3n lambda es una peque\u00f1a funci\u00f3n an\u00f3nima que puede tomar cualquier n\u00famero de argumentos y devuelve una expresi\u00f3n.<\/p>\n\n\n\n<p>Su sintaxis es:<\/p>\n\n\n\n<p><strong>lambda argumentos : expresi\u00f3n<\/strong><\/p>\n\n\n\n<p>Por ejemplo, una funci\u00f3n lambda para sumar dos n\u00fameros podr\u00eda ser esta:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"python\" class=\"language-python\">>>> sumados = lambda num1 , num2 : num1 + num2\n>>> sumados(2,5)\n7<\/code><\/pre>\n\n\n\n<p>En el siguiente ejemplo la funci\u00f3n lambda devuelve True para los elementos que cumplen la condici\u00f3n de tener menos de 6 caracteres y False para los que no.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"python\" class=\"language-python\">>>> lista = [ 'zorro','oso','tigre','ant\u00edlope' ]\n>>> caracteres = lambda elemento: len(elemento)&lt;6\n>>> for elemento in lista:\n...     print(caracteres(elemento))\n... \nTrue\nTrue\nTrue\nFalse<\/code><\/pre>\n\n\n\n<p>El siguiente ejemplo usa la funci\u00f3n lambda para averiguar que elementos contienen la letra \u2018e\u2019.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"python\" class=\"language-python\">>>> lista = [ 'zorro','oso','tigre','antilope' ]\n>>> con_e = lambda elemento: 'e' in elemento\n>>> for elemento in lista:\n...     print(con_e(elemento),elemento)\n... \nFalse zorro\nFalse oso\nTrue tigre\nTrue antilope<\/code><\/pre>\n\n\n\n<p>Las funciones lambdas se pueden usar para escribir menos c\u00f3digo como en el siguiente ejemplo en el que se obtiene una lista con las longitudes en caracteres de una lista.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"python\" class=\"language-python\">>>> lista = [ 'zorro','oso','tigre','antilope' ]\n>>> longitud = list(map(lambda elemento: len(elemento),lista))\n>>> longitud\n[5, 3, 5, 8]<\/code><\/pre>\n\n\n\n<p>O para obtener los cuadrados de una serie de elementos.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"python\" class=\"language-python\">>>> num = [ 2 , 3 , 5 , 7 , 11 , 13 ]\n>>> cuadrados = list(map(lambda n : n**2,num))\n>>> cuadrados\n[4, 9, 25, 49, 121, 169]<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Una funci\u00f3n lambda es una peque\u00f1a funci\u00f3n an\u00f3nima que puede tomar cualquier n\u00famero de argumentos y devuelve una expresi\u00f3n. Su &hellip; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[59,60,2,6],"class_list":["post-126","post","type-post","status-publish","format-standard","hentry","category-python","tag-funciones","tag-lambda","tag-python","tag-python3"],"_links":{"self":[{"href":"https:\/\/www.pythonparatodo.com\/index.php?rest_route=\/wp\/v2\/posts\/126","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pythonparatodo.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pythonparatodo.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pythonparatodo.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pythonparatodo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=126"}],"version-history":[{"count":2,"href":"https:\/\/www.pythonparatodo.com\/index.php?rest_route=\/wp\/v2\/posts\/126\/revisions"}],"predecessor-version":[{"id":128,"href":"https:\/\/www.pythonparatodo.com\/index.php?rest_route=\/wp\/v2\/posts\/126\/revisions\/128"}],"wp:attachment":[{"href":"https:\/\/www.pythonparatodo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pythonparatodo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pythonparatodo.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}