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1£©Python 3.4.2´úÂë
x = input('Please input a list:') x = eval(x)
start, end = eval(input('Please input the start position and the end position:')) print(x[start:end])
2£©Python 2.7.8´úÂë
x = input('Please input a list:')
start, end = input('Please input the start position and the end position:') print x[start:end]
2.6 Áбí¶ÔÏóµÄsort()·½·¨ÓÃÀ´¶ÔÁбíÔªËØ½øÐÐÔµØÅÅÐò£¬¸Ãº¯Êý·µ»ØÖµÎª None ¡£ 2.7 Áбí¶ÔÏóµÄ remove() ·½·¨É¾³ýÊ״γöÏÖµÄÖ¸¶¨ÔªËØ£¬Èç¹ûÁбíÖв»´æÔÚҪɾ³ýµÄÔªËØ£¬ÔòÅ׳öÒì³£¡£
2.8 ¼ÙÉèÁбí¶ÔÏóaListµÄֵΪ[3, 4, 5, 6, 7, 9, 11, 13, 15, 17]£¬ÄÇôÇÐÆ¬aList[3:7]µÃµ½µÄÖµÊÇ [6, 7, 9, 11] ¡£
2.9 Éè¼ÆÒ»¸ö×ֵ䣬²¢±àд³ÌÐò£¬Óû§ÊäÈëÄÚÈÝ×÷Ϊ¡°¼ü¡±£¬È»ºóÊä³ö×ÖµäÖжÔÓ¦µÄ¡°Öµ¡±£¬Èç¹ûÓû§ÊäÈëµÄ¡°¼ü¡±²»´æÔÚ£¬ÔòÊä³ö¡°ÄúÊäÈëµÄ¼ü²»´æÔÚ£¡¡±
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1£©Python 3.4.2´úÂë
d = {1:'a', 2:'b', 3:'c', 4:'d'} v = input('Please input a key:') v = eval(v)
print(d.get(v,'ÄúÊäÈëµÄµÄ¼ü²»´æÔÚ'))
2£©Python 2.7.8´úÂë
d = {1:'a', 2:'b', 3:'c', 4:'d'} v = input('Please input a key:')
print(d.get(v,'ÄúÊäÈëµÄµÄ¼ü²»´æÔÚ'))
2.10 ±àд³ÌÐò£¬Éú³É°üº¬20¸öËæ»úÊýµÄÁÐ±í£¬È»ºó½«Ç°10¸öÔªËØÉýÐòÅÅÁУ¬ºó10¸öÔªËØ½µÐòÅÅÁУ¬²¢Êä³ö½á¹û¡£
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1£©Python 3.4.2´úÂë
import random
x = [random.randint(0,100) for i in range(20)] print(x) y = x[0:10] y.sort() x[0:10] = y y = x[10:20]
y.sort(reverse=True) x[10:20] = y print(x)
2£©Python 2.7.8´úÂë
import random
x = [random.randint(0,100) for i in range(20)] print x y = x[0:10] y.sort() x[0:10] = y y = x[10:20]
y.sort(reverse=True) x[10:20] = y
print x
2.11 ÔÚPythonÖУ¬×ÖµäºÍ¼¯ºÏ¶¼ÊÇÓÃÒ»¶Ô ´óÀ¨ºÅ ×÷Ϊ½ç¶¨·û£¬×ÖµäµÄÿ¸öÔªËØÓÐÁ½²¿·Ö×é³É£¬¼´ ¡°¼ü¡± ºÍ ¡°Öµ¡± £¬ÆäÖÐ ¡°¼ü¡± ²»ÔÊÐíÖØ¸´¡£
2.12 ʹÓÃ×Öµä¶ÔÏóµÄ items() ·½·¨¿ÉÒÔ·µ»Ø×ÖµäµÄ¡°¼ü-Öµ¶Ô¡±ÁÐ±í£¬Ê¹ÓÃ×Öµä¶ÔÏóµÄ keys() ·½·¨¿ÉÒÔ·µ»Ø×ÖµäµÄ¡°¼ü¡±ÁÐ±í£¬Ê¹ÓÃ×Öµä¶ÔÏóµÄ values() ·½·¨¿ÉÒÔ·µ»Ø×ÖµäµÄ¡°Öµ¡±ÁÐ±í¡£
2.13 ¼ÙÉèÓÐÁбía = ['name', 'age', 'sex']ºÍb = ['Dong', 38, 'Male']£¬ÇëʹÓÃÒ»¸öÓï¾ä½«ÕâÁ½¸öÁбíµÄÄÚÈÝת»»Îª×ֵ䣬²¢ÇÒÒÔÁбíaÖеÄÔªËØÎª¡°¼ü¡±£¬ÒÔÁбíbÖеÄÔªËØÎª¡°Öµ¡±£¬Õâ¸öÓï¾ä¿ÉÒÔдΪ c = dict(zip(a,b)) ¡£
2.14 ¼ÙÉèÓÐÒ»¸öÁбía£¬ÏÖÒªÇó´ÓÁбíaÖÐÿ3¸öÔªËØÈ¡1¸ö£¬²¢ÇÒ½«È¡µ½µÄÔªËØ×é³ÉеÄÁбíb£¬¿ÉÒÔʹÓÃÓï¾ä b = a[::3] ¡£
2.15 ʹÓÃÁбíÍÆµ¼Ê½Éú³É°üº¬10¸öÊý×Ö5µÄÁÐ±í£¬Óï¾ä¿ÉÒÔдΪ [5 for i in range(10)] ¡£
2.16 ²»¿ÉÒÔ £¨¿ÉÒÔ¡¢²»¿ÉÒÔ£©Ê¹ÓÃdelÃüÁîÀ´É¾³ýÔª×éÖеIJ¿·ÖÔªËØ¡£
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3.1 ·ÖÎöÂß¼ÔËËã·û¡°or¡±µÄ¶Ì·ÇóÖµÌØÐÔ¡£ ´ð£º
¼ÙÉèÓбí´ïʽ¡°±í´ïʽ1 or ±í´ïʽ2¡±£¬Èç¹û±í´ïʽ1µÄÖµµÈ¼ÛÓÚTrue£¬ÄÇôÎÞÂÛ±í´ïʽ2µÄÖµÊÇʲô£¬Õû¸ö±í´ïʽµÄÖµ×ÜÊǵȼÛÓÚTrue¡£Òò´Ë£¬²»ÐèÒªÔÙ¼ÆËã±í´ïʽ2µÄÖµ¡£
3.2 ±àд³ÌÐò£¬ÔËÐкóÓû§ÊäÈë4λÕûÊý×÷ΪÄê·Ý£¬ÅÐ¶ÏÆäÊÇ·ñΪÈòÄê¡£Èç¹ûÄê·ÝÄܱ»400Õû³ý£¬ÔòΪÈòÄꣻÈç¹ûÄê·ÝÄܱ»4Õû³ýµ«²»Äܱ»100Õû³ýҲΪÈòÄê¡£
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1£©Python 3.4.2´úÂë
x = input('Please input an integer of 4 digits meaning the year:') x = eval(x)
if x@0==0 or (x%4==0 and not x0==0): print('Yes') else:
print('No')
2£©Python 2.7.8´úÂë
x = input('Please input an integer of 4 digits meaning the year:') if x@0==0 or (x%4==0 and not x0==0): print 'Yes' else:
print 'No'
3.3 PythonÌṩÁËÁ½ÖÖ»ù±¾µÄÑ»·½á¹¹£º forÑ»· ºÍ whileÑ»· ¡£
3.4 ±àд³ÌÐò£¬Éú³ÉÒ»¸ö°üº¬50¸öËæ»úÕûÊýµÄÁÐ±í£¬È»ºóɾ³ýÆäÖÐËùÓÐÆæÊý¡££¨Ìáʾ£º´ÓºóÏòǰɾ¡££©
´ð£ºPython 3.4.2´úÂëÈçÏ£¬
import random
x = [random.randint(0,100) for i in range(50)] print(x) i = len(x)-1 while i>=0:
if x[i]%2==1: del x[i]
i-=1 print(x)
3.5 ±àд³ÌÐò£¬Éú³ÉÒ»¸ö°üº¬20¸öËæ»úÕûÊýµÄÁÐ±í£¬È»ºó¶ÔÆäÖÐżÊýϱêµÄÔªËØ½øÐнµÐòÅÅÁУ¬ÆæÊýϱêµÄÔªËØ²»±ä¡££¨Ìáʾ£ºÊ¹ÓÃÇÐÆ¬¡££©
´ð£ºPython 3.4.2´úÂëÈçÏ£¬
import random
x = [random.randint(0,100) for i in range(20)] print(x) y = x[::2]
y.sort(reverse=True) x[::2] = y
print(x)
3.6 ±àд³ÌÐò£¬Óû§´Ó¼üÅÌÊäÈëСÓÚ1000µÄÕûÊý£¬¶ÔÆä½øÐÐÒòʽ·Ö½â¡£ÀýÈ磬10=2¡Á5£¬60=2¡Á2¡Á3¡Á5¡£
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1£©Python 3.4.2´úÂë
x = input('Please input an integer less than 1000:') x = eval(x) t = x i = 2
result = [] while True: if t==1: break if t%i==0:
result.append(i) t = t/i else:
i+=1
print(x,'=','*'.join(map(str,result)))
2£©Python 2.7.8´úÂë
x = input('Please input an integer less than 1000:') t = x i = 2
result = [] while True: if t==1:
break if t%i==0:
result.append(i) t = t/i else:
i+=1
print x,'=','*'.join(map(str,result))
3.7 ±àд³ÌÐò£¬ÖÁÉÙʹÓÃ2ÖÖ²»Í¬µÄ·½·¨¼ÆËã100ÒÔÄÚËùÓÐÆæÊýµÄºÍ¡£
´ð£ºPython 3.4.2´úÂëÈçÏ£¬Èç¹ûʹÓÃPython 2.7.8Ö»ÐèÒª°ÑÆäÖеÄprint()º¯Êý¸ÄΪprintÓï¾ä¼´¿É¡£
x = [i for i in range(1,100) if i%2==1] print(sum(x))
print(sum(range(1,100)[::2]))
3.8 ±àд³ÌÐò£¬Êä³öËùÓÐÓÉ1¡¢2¡¢3¡¢4ÕâËĸöÊý×Ö×é³ÉµÄËØÊý£¬²¢ÇÒÔÚÿ¸öËØÊýÖÐÿ¸öÊý×ÖֻʹÓÃÒ»´Î¡£
´ð£ºPython 3.4.2´úÂëÈçÏ£¬
´ð£ºPython 3.4.2´úÂëÈçÏ£¬Èç¹ûʹÓÃPython 2.7.8Ö»ÐèÒª°ÑÆäÖеÄprint()º¯Êý¸ÄΪprintÓï¾ä¼´¿É¡£
x = input('Please input x:') x = eval(x)
if x<0 or x>=20: print(0) elif 0<=x<5: print(x) elif 5<=x<10: print(3*x-5) elif 10<=x<20: print(0.5*x-2)
3.9 ±àд³ÌÐò£¬ÊµÏֶַκ¯Êý¼ÆË㣬ÈçϱíËùʾ¡£
x x<0 0<=x<5 0 x y