python怎么判读输入的是字符串还是数字 python3.2.3怎么判断输入的字符串是数字还是字母
python\u5982\u4f55\u5224\u65ad\u8f93\u5165\u662f\u5b57\u7b26\u4e32\u8fd8\u662f\u6570\u5b57\u8bf4\u660e\uff1a
python\u8f93\u5165\u7684\u5185\u5bb9\u5728\u5185\u90e8\u5168\u90e8\u4e3a\u5b57\u7b26\u4e32\uff0c\u6240\u4ee5\u8981\u5224\u65ad\u8fd9\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u4e00\u4e2a\u6570\u5b57\u3002\u5927\u591a\u6cd5\u5185\u90e8\u51fd\u6570\u5e76\u4e0d\u80fd\u5bf9\u5404\u79cd\u5f62\u5f0f\u7684\u6570\u636e\u505a\u51fa\u6b63\u786e\u5224\u65ad\uff0c\u4f8b\u5982isdigit()\u51fd\u6570\u53ea\u80fd\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7eaf\u6570\u636e\u7ec4\u6210\u5bf9\u4e8e\u8d1f\u6570\u5219\u65e0\u6548\u4e86\u3002\u6240\u4ee5\u53ef\u4ee5\u4f7f\u7528float()\u6765\u68c0\u6d4b\uff0c\u5bf9\u5404\u79cd\u6570\u5b57\u7684\u8868\u793a\u65b9\u6cd5\u90fd\u6709\u6548\u679c\u3002
\u65b9\u6cd5\u4ee3\u7801\uff1a
#\u5b9a\u4e49\u51fd\u6570
def isnub(s):
try:
nb = float(s) #\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u6570\u5b57\u6210\u529f\u5219\u8fd4\u56deTrue
return True
except ValueError as e:
return False #\u5982\u679c\u51fa\u73b0\u5f02\u5e38\u5219\u8fd4\u56deFalse
#\u6d4b\u8bd5
print(isnub('123'))
print(isnub('abc'))
print(isnub('123.123'))
print(isnub('-123.123'))
print(isnub('-1.609E-19'))
\u6d4b\u8bd5\u7ed3\u679c\u5982\u4e0b\uff1a
True
False
True
True
True
1\u3001python\u4e2d\u5b57\u7b26\u4e32\u65b9\u6cd5str.isalnum\u7528\u6765\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u7531\u6570\u5b57\u6216\u5b57\u6bcd\u7ec4\u6210\u3002\u5982\u679c\u5b57\u7b26\u4e32\u7531\u7eaf\u6570\u5b57\u7ec4\u6210\uff0c\u8fd4\u56de\u7ed3\u679cTrue\u3002
2\u3001\u5982\u679c\u5b57\u7b26\u4e32\u7531\u7eaf\u5b57\u6bcd\u7ec4\u6210\uff0c\u8fd4\u56de\u7ed3\u679cTrue\u3002
3\u3001\u5982\u679c\u5b57\u7b26\u4e32\u7531\u5b57\u6bcd+\u6570\u5b57\u7ec4\u6210\uff0c\u8fd4\u56de\u7ed3\u679cTrue\u3002\uff08\u4e0d\u533a\u5206\u5b57\u6bcd\u5927\u5c0f\u5199\uff09
4\u3001\u5982\u679c\u5b57\u7b26\u4e32\u9664\u4e86\u5b57\u6bcd\u8ddf\u6570\u5b57\u5916\uff0c\u542b\u6709\u522b\u7684\u5b57\u7b26\uff0c\u8fd4\u56de\u7ed3\u679cFalse\u3002
<type 'int'>
>>> type('adf')
<type 'str'>
绛旓細1銆佺ず渚嬩唬鐮 def isCh():word = input('璇杈撳叆涓涓瓧绗︼細')if '\u4e00' <= word <= '\u9fff':print('鏄眽瀛')else:print('涓嶆槸姹夊瓧')isCh()2銆佺ず渚嬬粨鏋 锛1锛夋槸姹夊瓧 璇疯緭鍏ヤ竴涓瓧绗︼細鍔 鏄眽瀛 锛2锛変笉鏄眽瀛 璇疯緭鍏ヤ竴涓瓧绗︼細涓嶆槸姹夊瓧 ...
绛旓細1銆乸ython涓瓧绗︿覆鏂规硶str.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<type 'str'>
绛旓細a=input()if a.isalpha():print("yes")else:print("no")
绛旓細2銆佸垵瀛﹁呯殑璇濈‘瀹炲彲浠ラ氳繃asciitable鏉鍒ゆ柇瀛楁瘝鍜屾暟瀛楃殑鍖哄埆銆Python閲岄潰鏈変袱涓唴缃嚱鏁皁rd鍜宑hr鍙敤銆俛sciitable閫氳繃鍒ゆ柇鍏跺瓧鐨勮寖鍥存潵纭畾鏄瀛楁瘝杩樻槸鍒殑銆傜‘瀹炲彲浠ヨ揪鍒颁綘鐜板湪鎯宠鐨勭洰鐨勩3銆乷ther))杈撳嚭锛氬瓧姣嶏細16鏁板瓧锛4鍏朵粬锛4涓嬮潰鏄疨ython鍐呯疆鍏充簬鍒ゆ柇瀛楃涓茬被鍨嬬殑鏂规硶浠嬬粛锛歴tr.isalnum()濡傛灉瀛楃涓蹭腑...
绛旓細sex=input("璇杈撳叆鎮ㄤ滑鎬у埆锛岀敺鐨勮緭鍏锛屽コ鐨勮緭鍏 ":)if sex="y":pass else:pass
绛旓細Do x = InputBox("璇杈撳叆涓涓瓧绗")Loop Until Len(x) = 1 Select Case Asc(LCase(x))Case 97 To 122 MsgBox "瀛楁瘝瀛楃"Case 48 To 57 MsgBox "鏁板瓧瀛楃"Case Else MsgBox "鍏朵粬瀛楃"End Select
绛旓細鍒ゆ柇绫诲瀷锛歩f type('xxx') == str isinstance(xxx,str)鍒ゆ柇闀垮害锛歩f len(xxx) == x 鍒ゆ柇鍐呭锛歺xxx.isdigit() # 鏄惁绾暟瀛 xxxx.isalpha() # 鏄惁绾瓧姣嶆垨姹夊瓧 xxxx.isalnum() # 鏄惁娣峰悎 浣嗙粓褰掓湁涓浜涙槸韬蹭笉寮try鐨勶紝姣斿鍒ゆ柇鏄惁绗﹀悎json鏍煎紡锛岃屼笖鐢╥f寰堥毦鍒ゆ柇鍏ㄩ潰锛屼笉濡傜洿鎺ry涓涓嬬ǔ...
绛旓細python name = input print 杩愯杩欐浠ｇ爜锛岀▼搴忎細绛夊緟鐢ㄦ埛杈撳叆鍚嶅瓧锛岀劧鍚庤緭鍑衡滀綘濂斤紝[杈撳叆鐨鍚嶅瓧]!鈥濄備簩銆乮sinstance鍑芥暟鐨勪娇鐢 isinstance鍑芥暟鐢ㄤ簬鍒ゆ柇涓涓璞℃槸鍚︽槸涓涓凡鐭ョ殑绫诲瀷锛岀被浼间簬type銆備娇鐢ㄦ柟娉曪細1. 鎺ユ敹涓や釜鍙傛暟锛岀涓涓弬鏁版槸瑕佹娴嬬殑瀵硅薄锛岀浜屼釜鍙傛暟鏄被鍨嬫垨鑰呬竴绯诲垪绫诲瀷銆傜ず渚嬶細python ...
