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1. »ù´¡Êý¾ÝÀàÐÍ ×ÜÀÀ 2. int 3. bool 4. str 5. forÑ»·
1. »ù´¡Êý¾ÝÀàÐÍ ×ÜÀÀ
¡¡ int: ÓÃÓÚ¼ÆË㣬¼ÆÊýµÈ str£º'ÕâЩÄÚÈÝ'£¬Óû§ÉÙÁ¿Êý¾ÝµÄ´æ´¢£¬±ãÓÚ²Ù×÷ bool£ºTrue, False£¬Á½ÖÖ״̬£¬»úÆ÷·´À¡¸øÓû§µÄ¶Ô/´í list£º[1, 'k', True, [], (), {}, ...] ´óÁ¿µÄÊý¾Ý£¬¸÷ÖÖÊý¾ÝÀàÐÍ£¬²Ù×÷·½±ã tuple£º(1, 'k', True, [], (), {}, ...) Ö»¶ÁÁбí dict£º×Öµä. ´óÁ¿µÄ¹ØÁªÐÔÊý¾Ý {'name': 'alex', 'name_list': ['˾ͽ', 'ÀîÁ«Ó¢', ...], 'Ì«°×': {'name': 'Ì«°×', 'sex': 'ÄÐ'}} set£º¼¯ºÏ. {} ¹Øϵ²âÊÔ. Á½ÖÖ¼¯ºÏÖ®¼äµÄ²¢¼¯ÊÇʲôµÈµÈ.
2. int
i = 4 print(i.bit_length()) ²éѯʮ½øÖÆת»¯³É¶þ½øÖÆÕ¼ÓõÄ×îСλÊý ½á¹û£º 3 Ê®½øÖÆ ¶þ½øÖÆ 1 0000 0001 2 0000 0010 3 0000 0011 4 0000 0100
3. bool
Êý¾ÝÀàÐÍÖ®¼äµÄת»¯ int <--> str str(int); int(str) ****** int <--> bool ·Ç0ΪTrue; 0ΪFalse True --> 1; False --> 0 str --> bool ''(¿Õ×Ö·û´®) --> False; ·Ç¿Õ --> True name = input('>>>') if name: print(666) else: print('ÎÞÄÚÈÝ') bool --> str ûɶÒâÒå
4. str
¶Ô×Ö·û´®µÄÏÂÃæÕâÁ½²¿·Ö²Ù×÷£¬ÐγɵĶ¼ÊÇÒ»¸öеÄ×Ö·û´®£¬ÓëÔÀ´µÄ×Ö·û´®Ã»ÓйØϵ
µÚÒ»²¿·Ö£ºË÷Òý¡¢ÇÐƬ¡¢²½³¤
- °´ÕÕË÷ÒýÈ¡Öµ£¬È¡³öÀ´µÄ¶¼ÊÇÒ»¸ö×Ö·ûÐγɵÄ×Ö·û´®
s1 = 'Python1ÆÚ_ÆïÊ¿¼Æ»®' s2 = s1[0] print(s2) P print(type(s2)) <class 'str'> s3 = s1[2] print(s3) t s4 = s1[-1] print(s4) »® s5 = s1[-2] print(s5) ¼Æ
- °´ÕÕÇÐƬȡֵ, ¹ËÍ·²»¹Ëβ
s6 = s1[0:6] print(s6) Python s61 = s1[:6] print(s61) Python s7 = s1[1:7] print(s7) ython1 s8 = s1[6:-1] print(s8) 1ÆÚ_ÆïÊ¿¼Æ s81 = s1[6:] print(s81) 1ÆÚ_ÆïÊ¿¼Æ»®
- °´ÕÕÇÐƬ+²½³¤
s1 = 'Python1ÆÚ_ÆïÊ¿¼Æ»®' s9 = s1[:5:2] print(s9) Pto s91 = s1[1::2] print(s91) yhnÆÚÆï¼Æ
Èç¹ûÏëµ¹ÐòÈ¡Öµ£¬¼ÓÒ»¸ö·´Ïò²½³¤(¸ººÅ)
s10 = s1[-1:-5:-1] print(s10) »®¼ÆÊ¿Æï s11 = s1[-1:-6:-2] print(s11) »®Ê¿_
µÚ¶þ²¿·Ö£º×Ö·û´®µÄ³£Ó÷½·¨
name = 'old boy' print(name.capitalize()) Old boy;Ê××Öĸ´óд *** print(name.title()) Old Boy s1 = 'alex wusir*taibai6nvshen' print(s1.title()) ·Ç×Öĸ¸ô¿ªµÄÿ¸ö²¿·ÖµÄÊ××Öĸ´óд **
center: ×Ö·û´®¾ÓÖУ¬Ç°ºóÌî³ä×Ô¶¨ÒåµÄ×Ö·û **
print(name.center(20, '*')) ******old boy*******
upper(È«²¿´óд); lower(È«²¿Ð¡Ð´) ******
print(name.upper()) OLD BOY
print(name.lower()) old boy
Ó¦ÓþÙÀý£º
username = input('ÇëÊäÈëÓû§Ãû£º') code = 'ADfeR'.lower() your_code = input('ÇëÊäÈëÑéÖ¤Â룺').lower() if username == 'alex' and code == your_code: print('µÇ¼³É¹¦') name = 'old boy'
startswith: ÅжÏÒÔʲôΪ¿ªÍ· *****
print(name.startswith('ol')) True ÅжϵÚ5¸öλÖÃÖ®ºóµÄ×Ö·û´®ÒÔʲôΪ¿ªÍ· print(name.startswith('b', 4)) True ÅжϵÚ2¸öλÖõ½µÚ5¸öλÖõÄ×Ö·û´®ÒÔʲôΪ¿ªÍ· print(name.startswith('ld', 1, 5)) True
endswith: ÅжÏÒÔʲôΪ½áβ *****
ÓëstartswithÓ÷¨Ò»Ö print(name.endswith('o')) False
swapcase: ´óСдת»» **
name = 'oLd boY' print(name.swapcase()) OlD BOy
find(*****): ͨ¹ýÔªËØÕÒË÷Òý, ÕÒµ½µÚÒ»¸öÔªËؾͷµ»ØÆäË÷ÒýÖµ£¬Ã»ÓдËÔªËØÔò·µ»Ø-1 *****
print(name.find('d')) 2 print(name.find('Ld')) 1 print(name.find('w')) -1 print(name.find('o', 1, -1)) 5; findÒ²¿ÉÒÔÉèÖÃ×Ö·û´®µÄ¿ªÊ¼ºÍ½áÊøλÖÃ
index(*****): ͨ¹ýÔªËØÕÒË÷Òý, ÕÒµ½µÚÒ»¸öÔªËؾͷµ»ØÆäË÷ÒýÖµ£¬Ã»ÓдËÔªËØÔò±¨´í
print(name.index('w')) ±¨´í
strip(*****): ĬÈÏÈ¥³ý×Ö·û´®Ç°ºóµÄ¿Õ¸ñ£¬»»Ðзû(\n)£¬ÖƱí·û(\t)
name = '\told boy ' print(name.strip()) ½á¹û£º old boy
strip£ºÖ¸¶¨È¥³ýµÄ×Ö·û
name1 = '*alex**' print(name1.strip('*')) alex name2 = 'weralexqwe' print(name2.strip('erw')) alexq
Ó¦ÓþÙÀý£º
username = input('ÇëÊäÈëÓû§Ãû£º').strip() if username == 'alex': print('µÇ¼³É¹¦')
lstrip: È¥³ýÇ°ÃæµÄ¿Õ¸ñ
rstrip: È¥³ýºóÃæµÄ¿Õ¸ñ
split: ½«×Ö·û´®·Ö¸î³ÉÁбí(str --> list); ĬÈÏ°´ÕÕ¿Õ¸ñ·Ö¸î
s1 = 'alex wusir taibai' l1 = s1.split() print(l1) ['alex', 'wusir', 'taibai'] s2 = 'alex,wusir taibai' l2 = s2.split(',') print(l2) ['alex', 'wusir taibai']
×¢ÒâÕâÈý¸öµÄÇø±ð
s3 = ' alex wusir taibai' print(s3.split()) ['alex', 'wusir', 'taibai'] s31 = ' alex wusir taibai' print(s31.split(' ')) ['', 'alex', 'wusir', 'taibai'] s4 = ',alex,wusir,taibai' print(s4.split(',')) ['', 'alex', 'wusir', 'taibai']
ÉèÖÃsplitµÄ·Ö¸î´ÎÊý
s5 = 'alexlwle' print(s5.split('l', 1)) ['a', 'exlwle'] print(s5.rsplit('l'))
join(**********): ×Ô¶¨ÖÆÁ¬½Ó·û£¬½«¿Éµü´ú¶ÔÏóÖеÄÔªËØÁ¬½ÓÆðÀ´
str1 = 'alex' s2 = '*'.join(str1) print(s2) a*l*e*x
replace(*****): Ìæ»»
str2 = 'alex ÊÇ´´Ê¼ÈË£¬alexºÜÅ£±Æ£¬alex...' s3 = str2.replace('alex', 'SB') print(s3) SB ÊÇ´´Ê¼ÈË£¬SBºÜÅ£±Æ£¬SB...
¿ÉÒÔÉèÖÃÌæ»»´ÎÊý£¬µ«ÊÇÖ»ÄÜ´ÓÇ°Íùºó¿ªÊ¼Ìæ»»
str2 = 'alex ÊÇ´´Ê¼ÈË£¬alexºÜÅ£±Æ£¬alex...' s3 = str2.replace('alex', 'SB', 1) print(s3) SB ÊÇ´´Ê¼ÈË£¬alexºÜÅ£±Æ£¬alex...
¸ñʽ»¯Êä³ö: format
ÈýÖÖ·½Ê½ µÚÒ»ÖÖ£º s1 = 'ÎÒ½Ð{}, ½ñÄê{}, ÐÔ±ð{}'.format('Ì«°×', '28', 'ÄÐ') print(s1) ÎÒ½ÐÌ«°×, ½ñÄê28, ÐÔ±ðÄÐ µÚ¶þÖÖ£º s2 = 'ÎÒ½Ð{0}, ½ñÄê{1}, ÐÔ±ð{2}, ÎÒ»¹ÊǽÐ{0}'.format('Ì«°×', '28', 'ÄÐ') print(s2) ÎÒ½ÐÌ«°×, ½ñÄê28, ÐÔ±ðÄÐ, ÎÒ»¹ÊǽÐÌ«°× µÚÈýÖÖ£º s3 = 'ÎÒ½Ð{name}, ½ñÄê{age}, ÐÔ±ð{sex}, ÎÒ»¹ÊǽÐ{name}'.format(age = '28', name = 'Ì«°×', sex = 'ÄÐ') print(s3) ÎÒ½ÐÌ«°×, ½ñÄê28, ÐÔ±ðÄÐ, ÎÒ»¹ÊǽÐÌ«°×
is ϵÁÐ
name = 'taibai123' print(name.isalnum()) True; ÅжÏnameÊÇ·ñÒÔ×Öĸ»òÕßÊý×Ö×é³É print(name.isdigit()) False; ÅжÏnameÊÇ·ñÈ«²¿ÒÔÊý×Ö×é³É print(name.isalpha()) False; ÅжÏnameÊÇ·ñÈ«²¿ÒÔ×Öĸ×é³É
¹«¹²·½·¨
count: ¼ÆÊý£¬¼ÆËã¸ø¶¨×Ö·û³öÏÖ¼¸´Î£¬¿ÉÒÔ½øÐÐÇÐƬ name = 'alex' print(name.count('a')) 1 len: ¼ÆËã×Ö·û´®Óж೤£¬¾ÍÊÇÔªËصĸöÊý print(len(name)) 4
5. forÑ»·
ÏÈÓÃwhileÑ»·´òӡÿ¸öÔªËØ s1 = 'sdkjasgfjgsafkj' index = 0 while index < len(s1): print(s1[index]) index += 1
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for i in s1: for ±äÁ¿ in iterable(¿Éµü´ú¶ÔÏó) print(i) for i in s1: for Ñ»·µÄ´ÎÊýÊǺͿɵü´ú¶ÔÏóµÄÔªËصĸöÊýÓÐ¹Ø print(s1)
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