鍦≒ython涓紝next()鍑芥暟鐢ㄤ簬鑾峰彇杩唬鍣紙iterator锛夌殑涓嬩竴涓厓绱犮€傚畠鎺ュ彈涓€涓凯浠ｅ櫒浣滀负鍙傛暟锛屽苟杩斿洖杩唬鍣ㄧ殑涓嬩竴涓厓绱犮€?/p>

涓嬮潰鏄?code>next()鍑芥暟鐨勪娇鐢ㄧず渚嬶細

# 鍒涘缓涓€涓凯浠ｅ櫒
my_iter = iter([1, 2, 3, 4, 5])

# 浣跨敤next()鍑芥暟鑾峰彇杩唬鍣ㄧ殑涓嬩竴涓厓绱?/span>
print(next(my_iter))  # 杈撳嚭锛?
print(next(my_iter))  # 杈撳嚭锛?
print(next(my_iter))  # 杈撳嚭锛?

鍦ㄤ笂闈㈢殑绀轰緥涓紝鎴戜滑棣栧厛浣跨敤iter()鍑芥暟灏嗗垪琛?code>[1, 2, 3, 4, 5]杞崲涓鸿凯浠ｅ櫒my_iter銆傜劧鍚庯紝鎴戜滑浣跨敤next()鍑芥暟鍒嗗埆鑾峰彇浜嗚凯浠ｅ櫒鐨勭涓€涓€佺浜屼釜鍜岀涓変釜鍏冪礌銆?/p>

闇€瑕佹敞鎰忕殑鏄紝濡傛灉杩唬鍣ㄥ凡缁忔病鏈夋洿澶氱殑鍏冪礌锛屽啀娆¤皟鐢?code>next()鍑芥暟浼氬紩鍙?code>StopIteration寮傚父銆備负浜嗛伩鍏嶅紓甯哥殑鍙戠敓锛屽彲浠ヤ娇鐢?code>next()鍑芥暟鐨勭浜屼釜鍙傛暟锛屾寚瀹氫竴涓粯璁ゅ€兼潵鏇夸唬寮傚父鐨勫彂鐢熴€?/p>

# 鍒涘缓涓€涓凯浠ｅ櫒
my_iter = iter([1, 2, 3])

# 浣跨敤next()鍑芥暟鑾峰彇杩唬鍣ㄧ殑涓嬩竴涓厓绱狅紝鎸囧畾榛樿鍊间负-1
print(next(my_iter, -1))  # 杈撳嚭锛?
print(next(my_iter, -1))  # 杈撳嚭锛?
print(next(my_iter, -1))  # 杈撳嚭锛?
print(next(my_iter, -1))  # 杈撳嚭锛?1锛堣凯浠ｅ櫒宸茬粡娌℃湁鏇村鐨勫厓绱狅紝杩斿洖榛樿鍊?1锛?/span>

鍦ㄤ笂闈㈢殑绀轰緥涓紝鎴戜滑灏?code>next()鍑芥暟鐨勭浜屼釜鍙傛暟璁剧疆涓?1锛岃繖鏍峰綋杩唬鍣ㄥ凡缁忔病鏈夋洿澶氱殑鍏冪礌鏃讹紝next()鍑芥暟浼氳繑鍥?1鑰屼笉鏄紩鍙?code>StopIteration寮傚父銆?/p>