º¯Êý×éºÏÊÇÖ¸½«¶à¸öº¯ÊýÁ¬½ÓÔÚÒ»Æð£¬ÐγÉ?Ò»¸öеĺ¯Êý¡£PythonÖпÉÒÔʹÓÃfunctools.reduce»òÕßoperator.composeµÈ¹¤¾ßÀ´ÊµÏÖº¯Êý×éºÏ¡£
fromfunctoolsimportreducefromoperatorimportadddefcompose(f,g):returnlambdax:f(g(x))add_five=lambdax:x+5square_add_five=compose(square,add_five)print(square_add_five(4))#Êä³ö:81
½â¾ö·½°¸£º
¼ì²éϵͳÅäÖãºÈ·±£ÏµÍ³Âú×ãÈí¼þµÄ×îµÍÒªÇ󣬰üÀ¨²Ù×÷ϵͳ°æ±¾¡¢ÄÚ´æ¡¢Ó²Å̿ռäµÈ¡£¼æÈÝÐÔ¼ì²é£ºÈç¹ûʹÓõÄÊÇÀϰ汾µÄ²Ù×÷ϵͳ£¬½¨ÒéÉý¼¶µ½×îа汾£¬»òÕ߲鿴¹Ù·½ÎĵµÖеļæÈÝÐÔÁÐ±í¡£ÖØÐÂÏÂÔØ£ºÓÐʱºòÏÂÔØµÄ°²×°°ü¿ÉÄÜË𻵣¬½¨ÒéÖØÐÂÏÂÔØ²¢³¢ÊÔ°²×°¡£È¨ÏÞÎÊÌ⣺ȷ±£°²×°¹ý³ÌÖеÄÓû§¾ßÓйÜÀíԱȨÏÞ£¬³¢ÊÔÒÔ¹ÜÀíÔ±Éí·ÝÔËÐа²×°³ÌÐò¡£
ÎÞ·¨Æô¶¯Èí¼þ
ÔÚ°²×°Íê³Éºó£¬Èç¹ûÈí¼þÎÞ·¨Õý³£Æô¶¯£¬¿ÉÒÔ³¢ÊÔÒÔÏ·½·¨£º
¼ì²é¿ì½Ý·½Ê½£ºÈ·ÈÏ×ÀÃæÉÏÊÇ·ñ´æÔÚÈí¼þµÄ¿ì½Ý·½Ê½£¬Èç¹ûûÓУ¬ÇëÊÖ¶¯´´½¨Ò»¸ö¿ì½Ý·½Ê½²¢³¢ÊÔÆô¶¯¡£
ÖØÐ°²×°£ºÈç¹û¿ì½Ý·½Ê½Õý³££¬µ«Èí¼þÈÔÎÞ·¨Æô¶¯£¬½¨Òé³¢ÊÔÐ¶ÔØ²¢?ÖØÐ°²×°Èí¼þ¡£ÔÚÐ¶ÔØ¹ý³Ì?ÖУ¬ÇëÈ·±£É¾³ýËùÓÐÓëÈí¼þÏà¹ØµÄÎļþºÍ×¢²á±íÏî¡£
½â¾ö·½·¨£º
ȨÏÞ·Ö¼¶ÉèÖãºÈ·±£Óû§È¨ÏÞÉèÖ÷ûºÏÆóҵʵ¼ÊÐèÇ󣬲¢°´ÕÕ·Ö¼¶¹ÜÀíÔÔò½øÐÐÉèÖ㬱ÜÃâ³öÏÖȨÏÞ¹ý¸ß»ò¹ýµÍµÄÇé¿ö¡£½ÇÉ«·ÖÅäÇåÎú£ºÃ÷È·¸÷½ÇÉ«µÄÖ°ÔðºÍȨÏÞ£¬²¢ÔÚϵͳÖнøÐÐÇåÎú·ÖÅ䣬±ÜÃâ½Çɫ֮¼äȨÏÞ³åÍ»¡£ÈÕÖ¾Éó²é£º²é¿´ÏµÍ³ÈÕÖ¾£¬Á˽âÓû§²Ù?×÷¹ý³ÌÖеÄȨÏޱ仯ºÍÒì³££¬ÒԱ㼰ʱ·¢Ïֺ;ÀÕýÎÊÌâ¡£
ÁªÏµ¼¼ÊõÖ§³Ö£ºÈç¹ûȨÏÞÉèÖÃÒÀ¾ÉÎÞ·¨½â¾öÎÊÌ⣬½¨ÒéÁªÏµ»ÆÆ·»ãºÚ¿Æ¼¼µÄ¼¼ÊõÖ§³ÖÍŶӣ¬ÌṩÏêϸµÄ²Ù×÷²½ÖèºÍ´íÎóÐÅÏ¢¡£
Êý¾Ý´¦Àí
º¯Êýʽ±à³ÌÔÚÊý¾Ý´¦ÀíÖзdz£ÓÐÓã¬ÌرðÊÇÔÚ´¦Àí´óÁ¿Êý¾Ýʱ¡£Í¨¹ýʹÓÃmapºÍfilter£¬¿ÉÒÔ¼ò»¯Êý¾Ý´¦ÀíÂß¼¡£
data=1,2,3,4,5,6,7,8,9,10#¹ýÂËżÊý£¬È»ºó¶Ô½á¹û½øÐÐÆ½·½filtered_and_squared=list(map(lambdax:x*x,filter(lambdax:x%2==0,data)))print(filtered_and_squared)#Êä³ö:4,16,36,64,100
У¶Ô£ºÖÜ×Óºâ(1C0m4pJyqZtPma0S7t9ZFfz4hTykKag)


