python 目录复制类 脚本
python 目录复制类 脚本
""" Use: "python ...\Tools\visitor_cpall.py fromDir toDir trace?" Like System\Filetools\cpall.py, but with the visitor classes and os.walk; does string replacement of fromDir with toDir at the front of all the names that the walker passes in; assumes that the toDir does not exist initially; """
import os from visitor import FileVisitor # visitor is in '.' from PP4E.System.Filetools.cpall import copyfile # PP4E is in a dir on path
class CpallVisitor(FileVisitor): def init(self, fromDir, toDir, trace=True): self.fromDirLen = len(fromDir) + 1 self.toDir = toDir FileVisitor.init(self, trace=trace)
def visitdir(self, dirpath):
toPath = os.path.join(self.toDir, dirpath[self.fromDirLen:])
if self.trace: print('d', dirpath, '=>', toPath)
os.mkdir(toPath)
self.dcount += 1
def visitfile(self, filepath):
toPath = os.path.join(self.toDir, filepath[self.fromDirLen:])
if self.trace: print('f', filepath, '=>', toPath)
copyfile(filepath, toPath)
self.fcount += 1if name == 'main': import sys, time fromDir, toDir = sys.argv[1:3] trace = len(sys.argv) > 3 print('Copying...') start = time.clock() walker = CpallVisitor(fromDir, toDir, trace) walker.run(startDir=fromDir) print('Copied', walker.fcount, 'files,', walker.dcount, 'directories', end=' ') print('in', time.clock() - start, 'seconds')
""" #################################################################################### Test: "python ...\Tools\visitor.py dir testmask [string]". Uses classes and subclasses to wrap some of the details of os.walk call usage to walk and search; testmask is an integer bitmask with 1 bit per available self-test; see also: visitor_*/.py subclasses use cases; frameworks should generally use__X pseudo private names, but all names here are exported for use in subclasses and clients; redefine reset to support multiple independent walks that require subclass updates; #################################################################################### """
import os, sys
class FileVisitor: """ Visits all nondirectory files below startDir (default '.'); override visit* methods to provide custom file/dir handlers; context arg/attribute is optional subclass-specific state; trace switch: 0 is silent, 1 is directories, 2 adds files """ def init(self, context=None, trace=2): self.fcount = 0 self.dcount = 0 self.context = context self.trace = trace
def run(self, startDir=os.curdir, reset=True):
if reset: self.reset()
for (thisDir, dirsHere, filesHere) in os.walk(startDir):
self.visitdir(thisDir)
for fname in filesHere: # for non-dir files
fpath = os.path.join(thisDir, fname) # fnames have no path
self.visitfile(fpath)
def reset(self): # to reuse walker
self.fcount = self.dcount = 0 # for independent walks
def visitdir(self, dirpath): # called for each dir
self.dcount += 1 # override or extend me
if self.trace > 0: print(dirpath, '...')
def visitfile(self, filepath): # called for each file
self.fcount += 1 # override or extend me
if self.trace > 1: print(self.fcount, '=>', filepath)class SearchVisitor(FileVisitor): """ Search files at and below startDir for a string; subclass: redefine visitmatch, extension lists, candidate as needed; subclasses can use testexts to specify file types to search (but can also redefine candidate to use mimetypes for text content: see ahead) """
skipexts = []
testexts = ['.txt', '.py', '.pyw', '.html', '.c', '.h'] # search these extsskipexts = ['.gif', '.jpg', '.pyc', '.o', '.a', '.exe'] # or skip these exts
def __init__(self, searchkey, trace=2):
FileVisitor.__init__(self, searchkey, trace)
self.scount = 0
def reset(self): # on independent walks
self.scount = 0
def candidate(self, fname): # redef for mimetypes
ext = os.path.splitext(fname)[1]
if self.testexts:
return ext in self.testexts # in test list
else: # or not in skip list
return ext not in self.skipexts
def visitfile(self, fname): # test for a match
FileVisitor.visitfile(self, fname)
if not self.candidate(fname):
if self.trace > 0: print('Skipping', fname)
else:
text = open(fname).read() # 'rb' if undecodable
if self.context in text: # or text.find() != -1
self.visitmatch(fname, text)
self.scount += 1
def visitmatch(self, fname, text): # process a match
print('%s has %s' % (fname, self.context)) # override me lowerif name == 'main': # self-test logic dolist = 1 dosearch = 2 # 3=do list and search donext = 4 # when next test added
def selftest(testmask):
if testmask & dolist:
visitor = FileVisitor(trace=2)
visitor.run(sys.argv[2])
print('Visited %d files and %d dirs' % (visitor.fcount, visitor.dcount))
if testmask & dosearch:
visitor = SearchVisitor(sys.argv[3], trace=0)
visitor.run(sys.argv[2])
print('Found in %d files, visited %d' % (visitor.scount, visitor.fcount))
selftest(int(sys.argv[1])) # e.g., 3 = dolist | dosearch
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