python瀛︿範绡?5 - 瀛楀吀 闆嗗悎
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鏍囩锛?a href='http://www.mamicode.com/so/1/%e9%bb%98%e8%ae%a4' title='榛樿'>榛樿
pop default 鍙彉 amp nbsp remove1銆佸瓧鍏?/strong>
瀹氫箟锛氬瓧鍏告槸浠?key 锛歷alue 鐨勫舰寮忔潵淇濆瓨鏁版嵁锛岀敤{} 鏉ヨ〃绀猴紝瀛樺偍鐨勬槸 key 锛?value
鏌ユ壘鏁堢巼姣旇緝楂橈紙娉細瀛楀吀瀛樺偍鏁版嵁鏃讹紝鐢ㄧ殑鏄痟ash鍊兼潵瀛樺偍锛岀畻娉曚笉鑳藉彉锛坧ython锛?/div>
鏁版嵁蹇呴』鏄笉鍙彉鐨勶紙鍙搱甯岋級锛屽瓧鍏哥殑key蹇呴』鏄彲鍝堝笇鐨勶紙涓嶅彲鍙橈級
鍒楄〃鏄彲鍙樼殑锛屼笉鍙搱甯?/div>
鍏冪粍鏄笉鍙彉鐨勶紝鍙搱甯岀殑
2銆佸瓧鍏哥殑澧炲垹鏀规煡
澧炲姞
dic[鏂発ey] = 鍊?/div>
dic.setdefault锛堬級 鏈夋坊鍔犵殑鍔熻兘锛屽鏋渒ey瀛樺湪锛屼笉娣诲姞
娴佺▼锛氬垽鏂柊key鏄惁鍦ㄥ瓧鍏镐腑瀛樺湪锛屽鏋滃凡缁忓瓨鍦ㄤ簡锛屼笉鍋氬彉鏇达紱濡傛灉涓嶅瓨鍦紝鎵ц娣诲姞鎿嶄綔
鍒犻櫎
dic.pop锛坘ey锛?nbsp;
dic.popitem() 闅忔満鍒犻櫎涓€椤癸紝鍦╬ython鏃╂湡鐨勭増鏈腑锛屽瓧鍏告槸鏃犲簭鐨勩€?/div>
del dic[key]
dic.clear() 娓呯┖
淇敼
dic[鑰乲ey] = 鍊?/div>
update(dic1) # 鎶奷ic1涓殑鍐呭鏇存柊鍒癲ic涓紝濡傛灉key閲嶅悕锛屽垯淇敼鏇挎崲锛屽鏋滀笉瀛樺湪key锛屽垯鏂板銆?/div>
鏌ヨ
涓€鑸敤key鏉ユ煡鎵惧叿浣撶殑鏁版嵁銆?/div>
1銆佺洿鎺ヤ娇鐢╧ey灏卞彲浠ユ嬁鍒皏alue銆傚綋key涓嶅瓨鍦ㄦ椂锛屾姤閿?
2銆乨ic.get(key) 褰搆ey 涓嶅瓨鍦ㄨ繑鍥?None
褰搆ey瀛樺湪鏃讹紝杩斿洖绗簩涓弬鏁帮紝榛樿绗簩涓弬鏁颁负 None
3銆?dic.setdefailt() 绗竴涓姛鑳芥槸娣诲姞锛堝綋key涓嶅瓨鍦ㄧ殑鏃跺€欙級 绗簩涓姛鑳芥槸鏌ヨ锛堟牴鎹綘缁欑殑key锛?/div>
鏁翠釜鎵ц娴佺▼锛氬垽鏂粰鐨刱ey鏄惁瀛樺湪锛屽鏋滃瓨鍦紝灏变笉鎵ц鏂板娴佺▼锛岀洿鎺ユ煡璇㈠嚭杩欎釜key瀵瑰簲鐨剉alue
濡傛灉key涓嶅瓨鍦紝鍏堟墽琛屾柊澧炴搷浣滐紝鍐嶄娇鐢╧ey鎶婂搴旂殑value鏌ヨ鍑烘潵銆?/div>
閬嶅巻锛屽瓧鍏告槸涓€涓彲杩唬瀵硅薄
a,b = 1,2 # 鎶婂悗闈㈢殑涓や釜鍊煎垎鍒祴鍊肩粰鍓嶉潰涓や釜鍙橀噺锛岃В鏋勶紝瑙ｅ寘
鍏冪粍鍜屽垪琛ㄦ槸鍙互瑙ｅ寘鐨?/div>
for k,v in dic.items():
print(item)
k,v = item #瑙ｆ瀯
k = item[0]
v = item[1]
print(k,v)
閬嶅巻瀛楀吀鐨勪袱濂楁柟妗?/div>
銆€銆€ 1銆佷娇鐢╢or寰幆鐩存帴閬嶅巻瀛楀吀
dic = {"璧靛洓":"鍒樻檽鍏?, "鍒樿兘":"鐜嬫檽鍒?, "鐜嬫湪鐢?:"鑼冧紵"}
for key in dic:
print(key)
print(value)
銆€銆€
銆€銆€ 2銆佸彲浠ヤ娇鐢ㄥ瓧鍏哥殑items() +瑙ｆ瀯鍙互鐩存帴鑾峰彇鍒発ey 鍜?value
for k,v in dic.items():
print(k)
print(v)
銆€銆€
3銆佸瓧鍏哥殑鐩稿叧鎿嶄綔
dic.keys() 鑾峰彇鍒版墍鏈夌殑閿€?/div>
dic.values() 鑾峰彇鍒版墍鏈夌殑鍊?/div>
dic.items() 鑾峰彇鍒版墍鏈夌殑閿€煎
4銆佸瓧鍏哥殑宓屽
瀛楀吀鐨勫祵濂楋紝瀛楀吀濂楀瓧鍏?/div>
5銆?set 闆嗗悎
set闆嗗悎鏄痯ython鐨勪竴涓熀鏈暟鎹被鍨嬨€俿et涓殑鍏冪礌鏄笉閲嶅鐨勬棤搴忕殑锛岄噷闈㈢殑鍏冪礌蹇呴』鏄彲hash鐨勶紙int,str,tuple,bool锛?/div>
set 灏辨槸dic绫诲瀷鐨勬暟鎹絾涓嶄繚瀛榲alue锛屽彧淇濆瓨key set涔熺敤{}琛ㄧず
娉細 set闆嗗悎涓殑鍏冪礌蹇呴』鏄彲hash鐨勶紝浣唖et鏈韩鏄笉鍙痟ash鐨勶紝set鏄彲鍙樼殑
浣跨敤set鐨勪笉鍙噸澶嶇殑鐗规€э紝鎴戜滑鍙互浣跨敤set鏉ュ幓閲嶃€€銆€
# 缁?list 鍘婚噸 lst =[45,6,鈥樷€榞eg,45,6] lst = list(set(lst)) #鎶妉ist杞寲鎴恠et锛屽啀杞寲鍥瀕ist print(lst)
銆€銆€
6銆乻et闆嗗悎鐨勫鍒犳敼鏌?/strong>
1銆佸鍔?/div>
s.add(鈥樺厓绱犫€? # 閲嶅鐨勫唴瀹逛笉浼氳娣诲姞鍒皊et闆嗗悎涓?/div>
s.update(鈥樺厓绱犫€? #杩唬鏇存柊
2銆佸垹闄?/div>
item = s.pop() # 闅忔満寮瑰嚭涓€涓?/div>
s.remove(鈥樺厓绱犫€? # 鑻ヨ繖涓厓绱犱笉瀛樺湪锛屽垹闄ゅ湪浼氭姤閿?/div>
s.clear() #娓呯┖set闆嗗悎锛屾竻绌哄畬涔嬪悗锛屼細鎵撳嵃涓?set锛堬級锛岃鍜宒ic鍖哄垎
3銆佷慨鏀?/div>
set闆嗗悎涓殑鏁版嵁娌℃湁绱㈠紩锛屼篃娌″姙娉曞幓瀹氫綅涓€涓厓绱狅紝鎵€浠ユ病鏈夊姙娉曠洿鎺ヤ慨鏀?/div>
鎴戜滑鍙互閲囩敤鍏堝垹闄ゅ悗娣诲姞鐨勬柟寮忔潵瀹屾垚淇敼鎿嶄綔
s = {"鍒樺槈鐜?, 鈥樺叧涔嬬惓鈥? "鐜嬬璐?,"寮犳浖?", "鏉庤嫢褰?}
# 鎶婂垬鍢夌幉鏀规垚璧垫湰?
s.remove("鍒樺槈鐜?)
s.add("璧垫湰?")
print(s)
銆€銆€
銆€銆€4銆佹煡璇?/div>
set 鏄竴涓彲杩唬鐨勫璞★紝鎵€浠ュ彲浠ヨ繘琛宖or寰幆
7銆乻et闆嗗悎鐨勪竴浜涘叾浠栨搷浣?/strong>
浜ら泦锛歴1&s2 s1.intersection(s2)
骞堕泦锛歴1|s2 s1.union(s2)
宸泦 锛歴1 -s2 s1.difference(s2) 寰楀埌s1 涓崟鐙瓨鍦ㄧ殑鍏冪礌
鍙嶄氦闆嗭紙s1^s2) s1.symmetric_difference(s2) 涓や釜闆嗗悎涓崟鐙瓨鍦ㄧ殑鍏冪礌
瀛愰泦锛? s1 < s2 s1.issubset(s2) s1 鏄?s2 鐨勫瓙闆嗗悧锛熻繑鍥? True or False
瓒呴泦锛?s1 >s2 s1 鏄痵2 鐨勮秴闆嗗悧锛?False or True
set闆嗗悎鏈韩鏄彲浠ュ彂鐢熸敼鍙樼殑锛屾槸涓嶅彲hash鐨勩€傛垜浠彲浠ョ敤frozenset鏉ヤ繚瀛樻暟鎹€俧rozenset鏄笉鍙彉鐨勶紝涔熷氨鏄竴涓彲鍝堝笇鐨勬暟鎹被鍨?nbsp;
s = frozenset(["璧垫湰?", "鍒樿兘", "???", "?璺?])
dic = {s:鈥?23鈥榼 # 鍙互姝ｅ父浣?浜?print(dic)
#{frozenset({鈥樺垬鑳解€? 鈥???鈥? 鈥樿档鏈?鈥? 鈥?璺€榼): 鈥?23鈥榼
銆€銆€
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