str.rsplit(sep=None, maxsplit=-1) -> list of strings
str.rstrip([chars]) -> str
str.split(sep=None, maxsplit=-1) -> list of strings
str.splitlines([keepends]) -> list of strings
str.startswith(prefix[, start[, end]]) -> book
str.strip([chars]) -> str
str.swapcase() -> str
str.title() -> str
str.translate(table) -> str
str.upper() -> str
str.zfill(width) -> str
Remarks
String objects are immutable, meaning that they can't be modified in place the way a list can. Because of this, methods on the built-in type str always return a newstr object, which contains the result of the method call.