python鐨刧lobal鍑芥暟濡備綍浣跨敤
扬州沐宇科技
2023-12-14 19:12:33
python
鍦?Python 涓紝鍙互浣跨敤 global 鍏抽敭瀛楀皢鍙橀噺澹版槑涓哄叏灞€鍙橀噺銆?/p>
鍏ㄥ眬鍙橀噺鏄湪鍑芥暟澶栭儴澹版槑鐨勫彉閲忥紝鍙互鍦ㄥ嚱鏁板唴閮ㄥ拰鍑芥暟澶栭儴璁块棶銆傚鏋滃嚱鏁板唴閮ㄥ０鏄庝簡涓€涓笌鍏ㄥ眬鍙橀噺鍚屽悕鐨勫眬閮ㄥ彉閲忥紝閭ｄ箞鍦ㄥ嚱鏁板唴閮ㄤ娇鐢ㄨ鍙橀噺鏃讹紝榛樿浼氫娇鐢ㄥ眬閮ㄥ彉閲忚€屼笉鏄叏灞€鍙橀噺銆傚鏋滈渶瑕佸湪鍑芥暟鍐呴儴淇敼鍏ㄥ眬鍙橀噺鐨勫€硷紝鍙互浣跨敤 global 鍏抽敭瀛椼€?/p>
浠ヤ笅鏄娇鐢?global 鍏抽敭瀛楃殑绀轰緥锛?/p>
x = 10 # 鍏ㄥ眬鍙橀噺
def func():
global x # 澹版槑 x 涓哄叏灞€鍙橀噺
x = 20 # 淇敼鍏ㄥ眬鍙橀噺 x 鐨勫€?/span>
func()
print(x) # 杈撳嚭 20
鍦ㄤ笂闈㈢殑绀轰緥涓紝func() 鍑芥暟鍐呴儴浣跨敤 global 鍏抽敭瀛楀０鏄庝簡 x 鍙橀噺涓哄叏灞€鍙橀噺锛屽苟灏嗗叾鍊间慨鏀逛负 20銆傚湪鍑芥暟澶栭儴鎵撳嵃 x 鐨勫€兼椂锛岃緭鍑轰负 20銆?/p>
闇€瑕佹敞鎰忕殑鏄紝鍦ㄥ嚱鏁板唴閮ㄤ娇鐢?global 鍏抽敭瀛楀０鏄庡叏灞€鍙橀噺鏃讹紝涓嶅繀鍦ㄥ叏灞€鑼冨洿鍐呭啀娆″０鏄庤鍙橀噺銆?/p>
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