我正在处理这段代码，这个奇怪的错误出现在Try代码末尾附近的命令中。整个脚本针对 .flac 文件，有时它会读取文件夹中的 .jpg 文件并炸毁。很简单，我继续在 . 之前添加if (".flac" or ".FLAC" in Song):，Try这样很容易，它只会处理正确的文件类型。但是，这完全没有区别，我不断收到以下错误
Traceback (most recent call last):
File ".\musync.py", line 190, in <module>
match_metadata(CurrentAlbum + Song, CoAlbum + Song)
File ".\musync.py", line 152, in match_metadata
TagSource = FLAC(SrcFile)
File "C:\Python34\lib\site-packages\mutagen\_file.py", line 41, in __init__
self.load(filename, *args, **kwargs)
File "C:\Python34\lib\site-packages\mutagen\flac.py", line 721, in load
self.__check_header(fileobj)
File "C:\Python34\lib\site-packages\mutagen\flac.py", line 844, in __check_header
"%r is not a valid FLAC file" % fileobj.name)
mutagen.flac.FLACNoHeaderError: 'C:/Users/berna/Desktop/Lib/Andrew Bird/Armchair Apocrypha/cover.jpg' is not a valid FLAC file
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File ".\musync.py", line 194, in <module>
check_song(CurrentAlbum + Song, CoAlbum)
File ".\musync.py", line 83, in check_song
TagSource = FLAC(SrcFile)
File "C:\Python34\lib\site-packages\mutagen\_file.py", line 41, in __init__
self.load(filename, *args, **kwargs)
File "C:\Python34\lib\site-packages\mutagen\flac.py", line 721, in load
self.__check_header(fileobj)
File "C:\Python34\lib\site-packages\mutagen\flac.py", line 844, in __check_header
"%r is not a valid FLAC file" % fileobj.name)
mutagen.flac.FLACNoHeaderError: 'C:/Users/berna/Desktop/Lib/Andrew Bird/Armchair Apocrypha/cover.jpg' is not a valid FLAC file
为什么if条件不起作用，我该如何解决？代码目前如下：
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import shutil
import os
from mutagen.flac import FLAC # Used for metadata handling.
from os import listdir # Used for general operations.
from fuzzywuzzy import fuzz # Last resource name association.
# Insert here the root directory of your library and device respectively.
lib = 'C:/Users/berna/Desktop/Lib/'
dev = 'C:/Users/berna/Desktop/Dev/'
# Faster file copying function, arguments go as follows: Source file location,
# target directory, whether to keep the filename intact and whether to create
# the target directory in case it doesn't exist.
def copy_file(SrcFile, TgtDir, KeepName=True, MakeDir=True):
SourceFile = None
TargetFile = None
KeepGoing = False
# Checks is TgtDir is valid and creates if needed.
if MakeDir and not os.path.isdir(TgtDir):
os.makedirs(TgtDir)
# Processes TgtDir depending on filename choice.
if KeepName is True:
TgtDir += os.path.basename(SrcFile)
print(TgtDir)
try:
SourceFile = open(SrcFile, 'rb')
TargetFile = open(TgtDir, 'wb')
KeepGoing = True
Count = 0
while KeepGoing:
# Read blocks of size 2**20 = 1048576
Buffer = SourceFile.read(2 ** 20)
if not Buffer:
break
TargetFile.write(Buffer)
Count += len(Buffer)
finally:
if TargetFile:
TargetFile.close()
if SourceFile:
SourceFile.close()
return KeepGoing
# XXX TODO
# Copies a directory (SrcDir) to TgtDir, if Replace is True will delete same
# name directory and replace with new one.
def copy_tree(SrcDir, TgtDir, Replace=True):
if not os.path.isdir(TgtDir):
os.makedirs(TgtDir)
Target = format_dir(TgtDir, os.path.basename(SrcDir))
if os.path.isdir(Target) and Replace:
shutil.rmtree(Target)
if not os.path.isdir(Target):
os.makedirs(Target)
for File in listdir(SrcDir):
FileDir = format_dir(SrcDir, File)
# copy_file(FileDir, Tgt)
return()
# Checks for new and deleted folders and returns their name.
def check_folder(SrcDir, TgtDir):
# Lists Source and Target folder.
Source = listdir(SrcDir)
Target = listdir(TgtDir)
# Then creates a list of deprecated and new directories.
Deleted = [FileName for FileName in Target if FileName not in Source]
Added = [FileName for FileName in Source if FileName not in Target]
# Returns both lists.
return (Added, Deleted)
# Checks for song in case there's a name mismatch or missing file.
def check_song(SrcFile, TgtDir):
Matches = []
# Invariably the new name will be that of the source file, the issue here
# is finding which song is the correct one.
NewName = TgtDir + '/' + os.path.basename(SrcFile)
TagSource = FLAC(SrcFile)
# Grabs the number of samples in the original file.
SourceSamples = TagSource.info.total_samples
# Checks if any song has a matching sample number and if true appends the
# song's filename to Matches[]
for Song in listdir(TgtDir):
SongInfo = FLAC(TgtDir + '/' + Song)
if (SongInfo.info.total_samples == SourceSamples):
Matches.append(Song)
# If two songs have the same sample rate (44100Hz for CDs) and the same
# length it matches them to the source by filename similarity.
if (Matches.count > 1):
Diffs = []
for Song in Matches:
Diffs.append(fuzz.ratio(Song, os.path.basename(SrcFile)))
if (max(Diffs) > 0.8):
BestMatch = TgtDir + '/' + Matches[Diffs.index(max(Diffs))]
os.rename(BestMatch, NewName)
else:
shutil.copy(SrcFile, TgtDir)
# If there's no match at all simply copy over the missing file.
elif (Matches.count == 0):
shutil.copy(SrcFile, TgtDir)
# If a single match is found the filename will be the first item on the
# Matches[] list.
else:
os.rename(TgtDir + '/' + Matches[0], NewName)
# Syncs folders in a directory and return the change count.
def sync(SrcDir, TgtDir):
AddCount = 0
DeleteCount = 0
# Grabs the folders to be added and deleted.
NewDir, OldDir = check_folder(SrcDir, TgtDir)
# Checks if any and then does add/rm.
if OldDir:
for Folder in OldDir:
shutil.rmtree(TgtDir + Folder)
DeleteCount += 1
if NewDir:
for Folder in NewDir:
shutil.copytree(SrcDir + Folder, TgtDir + Folder)
AddCount += 1
return(AddCount, DeleteCount)
# Fixes missing metadata fields.
def fix_metadata(SrcFile, TgtFile):
TagSource = FLAC(TgtFile)
TagTarget = FLAC(SrcFile)
# Checks for deleted tags on source file and deletes them from target.
if (set(TagTarget) - set(TagSource)):
OldTags = list(set(TagTarget) - set(TagSource))
for Tag in OldTags:
# TODO Right now I haven't quite figured out how to delete
# specific tags, so workaround is to delete them all.
TagTarget.delete()
# Checks for new tags on source file and transfers them to target.
if (set(TagSource) != set(TagTarget)):
NewTags = list(set(TagSource) - set(TagTarget))
for Tag in NewTags:
TagTarget["%s" % Tag] = TagSource[Tag]
TagTarget.save(TgtFile)
# Does metadata transfer between two files.
def match_metadata(SrcFile, TgtFile):
Altered = 0
TagSource = FLAC(SrcFile)
TagTarget = FLAC(TgtFile)
# For every different Tag in source song copy it to target and save.
for Tag in TagSource:
if TagSource[Tag] != TagTarget[Tag]:
Altered += 1
TagTarget[Tag] = TagSource[Tag]
TagTarget.save(TgtFile)
return(Altered)
# Simply does directory formatting to make things easier.
def format_dir(Main, Second, Third=""):
# Replaces \ with /
Main = Main.replace('\\', '/')
# Adds a / to the end of Main and concatenates Main and Second.
if(Main[len(Main) - 1] != '/'):
Main += '/'
Main += Second + '/'
# Concatenates Main and Third if necessary.
if (Third):
Main += Third + '/'
return (Main)
# Sync main folders in lib with dev.
sync(lib, dev)
# For every Artist in lib sync it's Albums
for Artist in listdir(lib):
sync(format_dir(lib, Artist), format_dir(dev, Artist))
# For every Album in Artist match songs
for Album in listdir(format_dir(lib, Artist)):
# Declares lib Album and dev Album to make function calls shorter.
CurrentAlbum = format_dir(lib, Artist, Album)
CoAlbum = format_dir(dev, Artist, Album)
for Song in listdir(CurrentAlbum):
if (".flac" or ".FLAC" in Song):
try:
# Tries to match lib and dev song's metadata.
match_metadata(CurrentAlbum + Song, CoAlbum + Song)
except:
# If that fails will try to fix both Filename and Tag
# fields.
check_song(CurrentAlbum + Song, CoAlbum)
fix_metadata(CurrentAlbum + Song, CoAlbum + Song)
try:
# Try again after fix.
match_metadata(CurrentAlbum + Song, CoAlbum + Song)
except Exception as e:
# If it still doesn't work there's black magic in place
# go sleep, drink a beer and try again later.
print("""Ehm, something happened and your sync failed.\n
Error:{}""".format(e))
raise SystemExit(0)