Python 字符串 isprintable() 方法Python 字符串方法实例检查文本中的所有字符是否可打印：txt = "Hello! Are you #1?"x = txt.isprintable()print(x)完整实例：txt = "Hello!
Python 字符串 isnumeric() 方法Python 字符串方法实例检查文本中的所有字符是否都是数字：txt = "565543"x = txt.isnumeric()print(x)完整实例：txt = "20491001"x = txt.isnu
Python 字符串 islower() 方法Python 字符串方法实例检查文本中所有字符是否都小写：txt = "hello world!"x = txt.islower()print(x)完整实例：txt = "hello world!"x = txt.is
Python 字符串 isidentifier() 方法Python 字符串方法实例检查字符串是否是有效标识符：txt = "Demo"x = txt.isidentifier()print(x)完整实例：txt = "Demo"x = txt.isidentifi
Python 字符串 isdigit() 方法Python 字符串方法实例检查文本中的所有字符是否都是数字：txt = "50800"x = txt.isdigit()print(x)完整实例：txt = "20491001"x = txt.isdigit()
Python 字符串 isdecimal() 方法Python 字符串方法实例检查 unicode 对象中的所有字符是否都是小数：txt = "\u0033" #unicode for 3x = txt.isdecimal()print(x)完整实例：txt
Python 字符串 isalpha() 方法Python 字符串方法实例检查文本中的所有字符是否都是字母：txt = "CompanyX"x = txt.isalpha()print(x)完整实例：txt = "CompanyX"x = txt.isalph
Python 字符串 isalnum() 方法Python 字符串方法实例检查文本中的所有字符是否都是字母数字：txt = "Company12"x = txt.isalnum()print(x)完整实例：txt = "Company12"x = txt.
Python 字符串 index() 方法Python 字符串方法实例文字中 "welcome" 一词在哪里？txt = "Hello, welcome to my world."x = txt.index("welcome")print(x)完整实例：txt = "Hell
Python 字符串 format() 方法Python 字符串方法实例将价格插入占位符内，价格应为定点，两位十进制格式：txt = "For only {price:.2f} dollars!"print(txt.format(price = 49))完
Python 字符串 find() 方法Python 字符串方法实例单词 "welcome" 在文本中的什么位置？txt = "Hello, welcome to my world."x = txt.find("welcome")print(x)完整实例：txt = "
Python 字符串 expandtabs() 方法Python 字符串方法实例将制表符大小设置为 2 个空格：txt = "H\te\tl\tl\to"x = txt.expandtabs(2)print(x)完整实例：txt = "H\te\tl\tl\to"x
Python 字符串 endswith() 方法Python 字符串方法实例检查字符串是否以标点符号 (.) 结尾：txt = "Hello, welcome to my world."x = txt.endswith(".")print(x)完整实例：txt =
Python 字符串 encode() 方法Python 字符串方法实例对字符串进行 UTF-8 编码：txt = "My name is Ståle"x = txt.encode()print(x)完整实例：txt = "My name is Ståle"x = txt
Python 字符串 count() 方法Python 字符串方法实例返回值 "apple" 在字符串中出现的次数：txt = "I love apples, apple are my favorite fruit"x = txt.count("apple")print(
