Python如何判断录入非数字？ Python3 先判断输入的是不是数字，若不是，则输出“输入...
python\u4e2d\u5982\u4f55\u5224\u65ad\u8f93\u5165\u53c2\u6570\u662f\u5426\u4e3a\u6570\u5b57?num=9
type(num)
type()\u53ef\u4ee5\u83b7\u5f97num\u7684\u7c7b\u578b
\u5224\u65ad\u53ef\u4ee5\u7528isinstance(num, int)\u6765\u5224\u65ad,\u7b26\u5408\u5219\u4e3atrue,\u53cd\u4e4b,false
def askNumber():
question='\u8bf7\u8f93\u5165\u4e00\u4e2a\u6570\u5b57'
rep=False
while not rep:
try:
rep =int(input(question))
except:
rep=False
question ='\u8f93\u5165\u65e0\u6548\uff0c\u8bf7\u8f93\u5165\u4e00\u4e2a\u6570\u5b57'
return rep
num=askNumber()
if num >0:
print('\u8f93\u5165\u7684\u662f\u6b63\u6570')
pass
elif num==0:
pass
else:
pass
if num1 in ['1234'] and num2 in ['1234']
绛旓細鐢╥sdigit() 鍑芥暟鍒ゆ柇銆傚彲浠ヨ繖鏍峰啓锛歩f not num1.isdigit() #鍗筹細濡傛灉num1涓嶆槸鏁板瓧銆
绛旓細鏂规硶涓锛氫娇鐢ㄥ唴缃嚱鏁癷sdigit Python涓殑`isdigit`鍑芥暟鍙互鍒ゆ柇涓涓瓧绗︿覆鏄惁鍙寘鍚暟瀛楀瓧绗銆傚鏋滃瓧绗︿覆涓寘鍚潪鏁板瓧瀛楃锛岃鍑芥暟灏嗚繑鍥濬alse銆備緥濡傦細python def is_number:if str_val.isdigit:return True else:return False 浣跨敤杩欎釜鍑芥暟鍙互鍒ゆ柇瀛楃涓叉槸鍚﹀畬鍏ㄧ敱鏁板瓧缁勬垚銆備絾瀹冧笉浼氳瘑鍒寘鍚皬鏁扮偣鐨勬诞鐐...
绛旓細瀵逛綘缂栧啓鐨勭▼搴忚繘琛屾祴璇曪細鍏堣緭鍏ヤ袱涓暟瀛楋紝鍐嶈緭鍏ヤ竴浜涙枃鏈屼笉鏄暟瀛銆
绛旓細鍙互鍔犱釜寰幆鍒ゆ柇锛屽鏋滄槸鏁板瓧锛屾彁绀虹敤鎴凤紝鐒跺悗鍐嶉噸鏂拌緭鍏ュ嵆鍙
绛旓細鎴栬咃紝鐩存帴鍒╃敤`%`锛堟ā锛夎繍绠楃涓1杩涜姣旇緝锛屽鏋滅粨鏋滀笉涓0锛屽垯琛ㄦ槑璇ユ暟涓嶆槸鏁存暟銆傜ず渚嬩唬鐮侊紙浣跨敤妯¤繍绠楃锛夛細```python data = [1, 2.5, 3, '4', 4.0, 5.5, '闈炴暟瀛']non_integers = [x for x in data if isinstance(x, (int, float)) and x % 1 != 0]娉ㄦ剰锛氳繖涓垪琛...
绛旓細def askNumber():question='璇疯緭鍏ヤ竴涓鏁板瓧'rep=False while not rep:try:rep =int(input(question))except:rep=False question ='杈撳叆鏃犳晥锛岃杈撳叆涓涓暟瀛'return rep num=askNumber()if num >0:print('杈撳叆鐨勬槸姝ｆ暟')pass elif num==0:pass else:pass ...
绛旓細1銆python涓瀛楃涓叉柟娉晄tr.isalnum鐢ㄦ潵鍒ゆ柇瀛楃涓叉槸鍚︾敱鏁板瓧鎴栧瓧姣嶇粍鎴愩傚鏋滃瓧绗︿覆鐢辩函鏁板瓧缁勬垚锛岃繑鍥炵粨鏋淭rue銆2銆佸鏋滃瓧绗︿覆鐢辩函瀛楁瘝缁勬垚锛岃繑鍥炵粨鏋淭rue銆3銆佸鏋滃瓧绗︿覆鐢卞瓧姣+鏁板瓧缁勬垚锛岃繑鍥炵粨鏋淭rue銆傦紙涓嶅尯鍒嗗瓧姣嶅ぇ灏忓啓锛4銆佸鏋滃瓧绗︿覆闄や簡瀛楁瘝璺熸暟瀛楀锛屽惈鏈夊埆鐨勫瓧绗︼紝杩斿洖缁撴灉False銆
绛旓細1銆佸彲浠ヨ繖鏍风紪鍐欑▼搴忥細瀹氫箟涓涓惈鏈夋墍鏈夊皬鍐欏瓧姣嶇殑鍒楄〃鍙橀噺w鍙婁竴涓緟娴嬪瓧绗︿覆鍙橀噺s銆傚s瀛楃涓蹭腑鐨勬瘡涓涓瓧绗﹁繘琛屽惊鐜凯浠ｆ娴嬪叾鏄惁浣嶄簬鍙橀噺w涓紝鑻ヤ负鐪燂紝鍒欏璁℃暟鍙橀噺c杩涜鍔犱竴鎿嶄綔銆傝緭鍑篶鍙橀噺锛屽嵆涓烘墍姹傘2銆佸垵瀛﹁呯殑璇濈‘瀹炲彲浠ラ氳繃asciitable鏉鍒ゆ柇瀛楁瘝鍜鏁板瓧鐨勫尯鍒Python閲岄潰鏈変袱涓唴缃嚱鏁皁rd鍜...
绛旓細鐢╥snumeric()鏂规硶銆俰snumeric() 鏂规硶妫娴嬪瓧绗︿覆鏄惁鍙敱鏁板瓧缁勬垚锛屽鏋滃瓧绗︿覆涓彧鍖呭惈鏁板瓧瀛楃锛屽垯杩斿洖 True锛屽惁鍒欒繑鍥 False
绛旓細python鐨瀛楃涓茬被鍨嬫湁涓涓睘鎬sdigit鍙互鍒ゆ柇鏄惁涓鏁板瓧 鍋囪璁剧疆浜嗕竴涓彉閲廰锛屽垯閫夋嫨鎶奱杞崲鎴愬瓧绗︿覆锛屽啀鍒ゆ柇 浠ｇ爜濡備笅锛歛=123 print(str(a).isdigit())濡傛灉鍙橀噺a鏄暟瀛楋紝鍒欒繑鍥濼rue锛屽惁鍒欒繑鍥濬alse
