python判断用户输入的字符串是小写字母还是数字 python 如何判断字符串是否只有小写字母或数字
python3.2.3\u600e\u4e48\u5224\u65ad\u8f93\u5165\u7684\u5b57\u7b26\u4e32\u662f\u6570\u5b57\u8fd8\u662f\u5b57\u6bcd1\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
s\u4e3a\u5b57\u7b26\u4e32
s.isalnum() \u6240\u6709\u5b57\u7b26\u90fd\u662f\u6570\u5b57\u6216\u8005\u5b57\u6bcd
s.isalpha() \u6240\u6709\u5b57\u7b26\u90fd\u662f\u5b57\u6bcd
s.isdigit() \u6240\u6709\u5b57\u7b26\u90fd\u662f\u6570\u5b57
s.islower() \u6240\u6709\u5b57\u7b26\u90fd\u662f\u5c0f\u5199
s.isupper() \u6240\u6709\u5b57\u7b26\u90fd\u662f\u5927\u5199
s.istitle() \u6240\u6709\u5355\u8bcd\u90fd\u662f\u9996\u5b57\u6bcd\u5927\u5199\uff0c\u50cf\u6807\u9898
s.isspace() \u6240\u6709\u5b57\u7b26\u90fd\u662f\u7a7a\u767d\u5b57\u7b26\u3001\t\u3001\n\u3001\r
题主你好,
代码及测试截图如下:
希望可以帮到题主, 欢迎追问
绛旓細def isnum(n):try:t=float(n)return Trueexcept:return Falseprint(isnum('123'))print(isnum('12.3'))print(isnum('abc'))
绛旓細try: x=float(input()) if x<=-2: y=-2*x-1 elif x<=1: y=3.0 else: y=2*x+1 print("y=%.2f"%y)except: print("Input Error!")
绛旓細Do x = InputBox("璇杈撳叆涓涓瀛楃")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1銆佺ず渚嬩唬鐮 def isCh():word = input('璇杈撳叆涓涓瀛楃锛')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 ...
绛旓細璁よ瘉鐢ㄦ埛 瑙嗛浣滆 鏃ユ姤浣滆 鐭ラ亾鍥㈤槦 璁よ瘉鍥㈤槦 鍚堜紮浜 浼佷笟 濯掍綋 鏀垮簻 鍏朵粬缁勭粐 鍟嗗煄 鎵嬫満绛旈 鎴戠殑 python鎺ユ敹浠庨敭鐩杈撳叆鐨涓涓插瓧绗︿覆,杈撳嚭鍏朵腑涓嶅悓鐨勫瓧绗浠ュ強瀹冧滑鍚勮嚜鐨勫瓧鏁 python鎺ユ敹浠庨敭鐩樿緭鍏ョ殑涓涓插瓧绗︿覆,杈撳嚭鍏朵腑涓嶅悓鐨勫瓧绗︿互鍙婂畠浠悇鑷殑瀛楁暟... python鎺ユ敹浠庨敭鐩樿緭鍏ョ殑涓涓插瓧绗︿覆,杈撳嚭...
绛旓細璇存槑锛 python杈撳叆鐨鍐呭鍦ㄥ唴閮ㄥ叏閮ㄤ负瀛楃涓诧紝鎵浠ヨ鍒ゆ柇杩欎釜瀛楃涓叉槸鍚︿负涓涓暟瀛椼傚ぇ澶氭硶鍐呴儴鍑芥暟骞朵笉鑳藉鍚勭褰㈠紡鐨勬暟鎹仛鍑烘纭垽鏂紝渚嬪isdigit()鍑芥暟鍙兘鍒ゆ柇瀛楃涓鏄惁涓虹函鏁版嵁缁勬垚瀵逛簬璐熸暟鍒欐棤鏁堜簡銆傛墍浠ュ彲浠ヤ娇鐢╢loat()鏉妫娴锛
绛旓細鎸夌収浣犵殑瑕佹眰缂栧啓鐨勯嗗簭鏄剧ず瀛楃涓茬殑Python3绋嬪簭濡備笅 s = input("璇杈撳叆涓涓瓧绗︿覆:")print(s[::-1]) #s[::-1]鐩稿綋浜巗[-1:-len(s)-1:-1],涔熷氨鏄粠鏈鍚庝竴涓厓绱犲埌绗竴涓厓绱犲鍒朵竴閬嶏紝鍗抽嗗簭
绛旓細鍙互浣跨敤Python鍐呯疆鍑芥暟isalpha鏉妫鏌ュ瓧绗︿覆涓槸鍚﹀寘鍚瓧姣嶏紝鍖呮嫭澶у皬鍐欏瓧姣嶃傞氳繃閬嶅巻瀛楃涓蹭腑鐨勬瘡涓瓧绗︼紝璋冪敤isalpha鍑芥暟妫鏌ヨ瀛楃鏄惁涓哄瓧姣嶏紝濡傛灉鏄瓧姣嶅垯杩斿洖True锛屽惁鍒欒繑鍥濬alse銆傚叿浣撳疄鐜板涓嬶細绛旀锛氫娇鐢Python涓殑isalpha鍑芥暟缁撳悎寰幆閬嶅巻瀛楃涓蹭腑鐨勬瘡涓瓧绗︼紝鍙互鍒ゆ柇瀛楃涓涓槸鍚﹀寘鍚ぇ灏忓啓瀛楁瘝銆傝缁嗚В閲...
绛旓細a=input()if a.isalpha():print("yes")else:print("no")
绛旓細import syss = set()for i in sys.argv[1:]: s.add(i)for i in s: print(i)
