isalpha()方法检查字符串是否仅由字母组成。
语法
以下是islpha()方法的语法：
str.isalpha()
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参数
返回值
如果字符串中的所有字符字母和至少有一个字符此方法返回true，否则返回false。
例子
下面的例子显示了isalpha() 方法的使用。
#!/usr/bin/python
str = "this"; # No space & digit in this string
print str.isalpha();
str = "this is string example....wow!!!";
print str.isalpha();
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当我们运行上面的程序，它会产生以下结果：
True
False
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