Path manipulation library
betterpath, or “bp”, is an adaptation of the classic Twisted FilePath type and interface. bp provides a simple, robust, well-tested object abstraction over file paths, generalizing the concept of file paths beyond filesystems.
bp exposes an interface, bp.abstract.IFilePath, for file paths, and provides the following concrete implementations:
- bp.filepath.FilePath, for the root filesystem
- bp.zippath.ZipPath, for ZIP archives
- bp.memory.MemoryPath, for in-memory temporary filesystems
Saving Data to Disk
The Old Way
def save(base, fragments, data): # Unsafe either way; what if `fragments` contains ".."? path = os.path.join(os.path.abspath(base), os.sep.join(fragments)) # path = os.path.join(os.path.abspath(base), *fragments) # I hope that this doesn't fail mid-write! Also, did the directories # exist? I think so, yes. with open(path, "wb") as handle: handle.write(data)
The New Way
def save(base, fragments, data): path = base.descendant(fragments) path.parent().makeDirs() path.setContent(data)
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