x[0:10] = y y = x[10:20]
y.sort(reverse=True) x[10:20] = y print x
2.6 ÔÚPythonÖУ¬×ÖµäºÍ¼¯ºÏ¶¼ÊÇÓÃÒ»¶Ô ´óÀ¨ºÅ ×÷Ϊ¶¨½ç·û£¬×ÖµäµÄÿ¸öÔªËØÓÐÁ½²¿·Ö×é³É£¬¼´ ¼ü ºÍ Öµ £¬ÆäÖÐ ¼ü ²»ÔÊÐíÖØ¸´¡£
2.7 ¼ÙÉèÓÐÁбía = ['name','age','sex']ºÍb = ['Dong',38,'Male']£¬ÇëʹÓÃÒ»¸öÓï¾ä½«ÕâÁ½¸öÁбíµÄÄÚÈÝת»»Îª×ֵ䣬²¢ÇÒÒÔÁбíaÖеÄÔªËØÎª¼ü£¬ÒÔÁбíbÖеÄÔªËØÎªÖµ£¬Õâ¸öÓï¾ä¿ÉÒÔдΪ c = dict(zip(a,b))¡£
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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¡£
´ð£º
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 ±àд³ÌÐò£¬Éú³ÉÒ»¸ö°üº¬50¸öËæ»úÕûÊýµÄÁÐ±í£¬È»ºóɾ³ýÆäÖÐËùÓÐÆæÊý¡££¨Ìáʾ£º´ÓºóÏòǰɾ¡££©
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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)
2£©Python 2.7.8´úÂë
°ÑÉÏÃæµÄ´úÂëÖеÚÈýÐкÍ×îºóÒ»ÐиÄΪprint x¼´¿É¡£
34 ±àд³ÌÐò£¬Éú³ÉÒ»¸ö°üº¬20¸öËæ»úÕûÊýµÄÁÐ±í£¬È»ºó¶ÔÆäÖÐżÊýϱêµÄÔªËØ½øÐнµÐòÅÅÁУ¬ÆæÊýϱêµÄÔªËØ²»±ä¡££¨Ìáʾ£ºÊ¹ÓÃÇÐÆ¬¡££©
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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)
2£©Python 2.7.8´úÂë
°ÑÉÏÃæµÄ´úÂëÖеÚÈýÐкÍ×îºóÒ»ÐиÄΪprint x¼´¿É¡£
35 ±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))
3.6 ±àд³ÌÐò£¬ÖÁÉÙʹÓÃ2ÖÖ²»Í¬µÄ·½·¨¼ÆËã100ÒÔÄÚËùÓÐÆæÊýµÄºÍ¡£
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x = [i for i in range(1,100) if i%2==1] print(sum(x))
print(sum(range(1,100)[::2]))
3.7 ±àд³ÌÐò£¬ÊµÏֶַκ¯Êý¼ÆË㣬ÈçϱíËùʾ¡£
x x<0 0<=x<5 5<=x<10 10<=x<20 20<=x y 0 x 3x-5 0.5x-2 0 ´ð£ºPython 3.4.2´úÂëÈçÏ£¬Èç¹ûʹÓÃPython 2.7.8Ö»ÐèÒª°ÑÆäÖеÄprint()º¯Êý¸ÄΪprintÓï¾ä¼´¿É¡£