鍙橀噺绫诲瀷-Set

Posted 2021-01-08

鏍囩锛?a href='http://www.mamicode.com/so/1/%e5%93%88%e5%b8%8c' title='鍝堝笇'>鍝堝笇   int   indexing   鍒ゆ柇   lov   values   鐗圭偣   typeerror   搴忓垪   

鏁欑▼:
    闆嗗悎鏄竴涓棤搴忎笉閲嶅鍏冪礌鐨勫簭鍒楋紝瀹冪殑鐗圭偣鏄細鏈夌殑鍙彉锛屾湁鐨勪笉鍙彉锛屽厓绱犳棤搴忎笉鍙噸澶嶏紒

涓€锛氶泦鍚堢殑鍒涘缓

    锛?锛変娇鐢ㄨ姳鎷彿

        set={value1, values2}
        
        娉ㄦ剰鍒涘缓涓€涓┖闆嗗悎鐨勬椂鍊欎笉鑳界敤{}锛屾鏃跺垱寤虹殑鏄竴涓瓧鍏?br>
    锛?锛変娇鐢ㄥ唴鑱斿嚱鏁皊et锛堬級------>鍙互鍘熷湴淇敼鐨勯泦鍚?br>
        s = set()
    
    娉ㄦ剰锛?nbsp;   闆嗗悎鏄棤搴忕殑锛堥泦鍚堜笉鏄簭鍒楃被鍨嬶紝鍒欓泦鍚堜篃涓嶆敮鎸佺储寮曞拰鍒囩墖锛夛紝
        鎵撳嵃缁撴灉鍙栧喅浜庡唴閮ㄥ瓨鍌ㄧ粨鏋勫拰杈撳嚭鏂瑰紡

    锛?锛変娇鐢ㄥ唴鑱斿嚱鏁癴rozenset()---->hashable 鍙搱甯屽崱绫诲瀷
浜岋細闆嗗悎鐨勭储寮曪紙涓嶅厑璁革級

     File "<ipython-input-5-9b6a789630ee>", line 1, in <module>
        set_1[1]
    TypeError: 鈥榮et鈥?object does not support indexing

涓夛細闆嗗悎鐨勮繍绠?br>
    锛?锛夊厓绱犱笌闆嗗悎涔嬮棿鐨勫叧绯?br>
        鈥榠鈥?in set(鈥榠love鈥?

    锛?锛夐泦鍚坅涓庨泦鍚坆涔嬮棿鐨勫叧绯?br>        
        a == b            鍒ゆ柇鏄惁鐩哥瓑
        a < b 鎴栬€?a.issubset(b) 鍒ゆ柇鏄惁涓哄瓙闆?br>        a 骞?b  ---> a|b 鎴栬€?a.union(b)
        a 浜?b  ---> a&b 鎴栬€?a.intersection(b)
        a 琛?b  ---> a-b 鎴栬€?a.difference(b)
        a 鍜?b 鐨勫绉板樊闆?nbsp;   a^b 鎴栬€?a.symmetric_difference(b)

        
涓夛細闆嗗悎鍏冪礌鐨勬坊鍔?br>
    锛?锛夋柟娉曚竴锛?nbsp;   s.add(x)
    锛?锛夋柟娉曚簩锛?     s.update(x)    鍏朵腑x鍙互鏄垪琛紝鍏冪粍锛屽瓧鍏?br>
鍥涳細闆嗗悎鍏冪礌鐨勫垹闄?br>    
    锛?锛夋柟娉曚竴锛?nbsp;   s.remove(x)    鍏冪礌涓嶅瓨鍦ㄥ彂鐢熼敊璇?br>    锛?锛夋柟娉曚簩锛?     s.discard(x)    鍏冪礌涓嶅瓨鍦ㄤ笉浼氬彂鐢熼敊璇?br>    锛?锛夋柟娉曚笁锛?     s.pop()        闅忔満鍒犻櫎涓€涓厓绱?br>    锛?锛夋柟娉曞洓锛?     s.clear()    娓呯┖闆嗗悎

浜旓細闆嗗悎鍐呯疆鍑芥暟

    len锛坰et锛?---set鍏冪礌鐨勬€绘暟
    set.add()-----娣诲姞
    set.update()--鏇存柊
    杩樺寘鎷笂闈㈢殑鍥涗釜鍑芥暟
    
CODE:
# -----------------------------------------------------------------------------------------------------#
# 闆嗗悎鐨勫垱寤?br># -----------------------------------------------------------------------------------------------------#
set_1 = set(鈥榓bracadabra鈥?  # 鍒涘缓鍙彉鐨勯泦鍚?br>print("set_1:", set_1)

set_1.add(鈥榩ython鈥?         # 鍏冪礌鐨勬坊鍔?br>print("娣诲姞Python鍚巗et_1:", set_1)

set_2 = set(鈥榓lacazam鈥?
print("set_2:", set_2)

set_3 = frozenset(鈥榝aith鈥?  # 鍒涘缓涓嶅彲鍙樼殑闆嗗悎楠岃瘉鍏冪礌涓嶅彲娣诲姞
print("鍒涘缓涓嶅彲鍙橀泦鍚坰et_3:", set_3)


# -----------------------------------------------------------------------------------------------------#
# 闆嗗悎鐨勮繍绠?br># -----------------------------------------------------------------------------------------------------#
print("set_1 - set_2: ", set_1 - set_2)

print("set_1 | set_2: ", set_1 | set_2)

print("set_1 & set_2: ", set_1 & set_2)

print("set_1 ^ set_2: ", set_1 ^ set_2)


# -----------------------------------------------------------------------------------------------------#
# 闆嗗悎鍏冪礌鐨勬坊鍔狅紙瀵逛簬鍙彉闆嗗悎锛?br># -----------------------------------------------------------------------------------------------------#

# 鏂规硶涓€

set_2 = set(鈥榓lacazam鈥?
set_2.add("faith")
print("娣诲姞鍏冪礌鏂规硶涓€:", set_2)

# 鏂规硶浜?br>x = {1, 2, 3, 鈥榓aa鈥榼        # 鍒楄〃
y = (1, 2, 3, 鈥榓aa鈥?        # 鍏冪粍
z = {1: 鈥榳ang鈥? 2: 鈥榓aa鈥榼   # 瀛楀吀--->鍙坊鍔犻敭鍊?br>
set_2.update(z)
print("娣诲姞鍏冪礌鏂规硶浜?", set_2)

# -----------------------------------------------------------------------------------------------------#
# 闆嗗悎鍏冪礌鐨勫垹闄?br># -----------------------------------------------------------------------------------------------------#

# 鏂规硶涓€
set_2.remove(鈥榝aith鈥?
print("鍒犻櫎鍏冪礌鏂规硶涓€:", set_2)

# 鏂规硶浜?br>set_2.discard(鈥?鈥?
print("鍒犻櫎鍏冪礌鏂规硶浜?", set_2)

# 鏂规硶涓?br>set_2.pop()

print("鍒犻櫎鍏冪礌鏂规硶涓?", set_2)
# 鏂规硶涓?br>set_2.clear()
print("鍒犻櫎鍏冪礌鏂规硶鍥?", set_2)