Ray's playground

摘要： Problem You need to rename files throughout a subtree of directories, specifically changing the names of all files with a given extension so that they have a different extension instead. Solution Oper... 阅读全文

摘要： Definition Separates the construction of a complex object from its representation so that the same construction process can create different representations. Class Diagram Participants Builder... 阅读全文

摘要： Precondition 1. os.walk(top[, topdown=True[, onerror=None[, followlinks=False]]]) Generate the file names in a directory tree by walking the tree either top-down or bottom-up. For each directory in t... 阅读全文