Python字符串处理函数简明总结
返回被去除指定字符的字符串
默认去除空白字符
删除首尾字符：str.strip([char])
删除首字符：str.lstrip([char])
删除尾字符str.strip([char])
判断是否匹配首末字符
匹配成功返回True,否则返回False
匹配首字符：str.startswith(char[, start[, end]])
匹配末字符：str.endswith(char[, start[, end]])
查找字符,找到返回字符位置,否则返回-1
从字符串开头查找str.find(char[, start[, end]])
从字符串末端开始查找str.find(char[, start[, end]])
分解字符
str.split([sep [, maxsplit]])
连接字符
str.join(iterable)
“str”是连接字符，“iterable”是被连接的可迭代字符串
替换字符
str.replace(old, new [,count])
返回替换后的字符串,count标识替换的次数，默认所有的字符都被替换
按换行符分解字符串，返回行列表
str.splitlines([keepends])
结果不保留换行符，除非keepends为True。
大小写转换
大小写互换：str.swapace()
转换为大写：str.upper()
转换为小写：str.lower()
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