Question

我是python的新手，并试图以递归方式将目录中所有tar文件的gz内容及其内部目录上传到s3。这总共约有1,350,000个tar文件。

我没有空间同时解压所有文件所以我一次只做其中一个。

最初我的脚本工作但是一旦遇到错误（tar文件已损坏），我的脚本就会结束。我添加了一堆try除了子句尝试记录并继续这些错误，现在我的脚本似乎没有上传文件，即使我得到如下输出::

('iter: ', '/srv/nfs/storage/bucket/2015/11/20/KFWS/NWS_NEXRAD_NXL2DP_KFWS_20151120130000_20151120135959.tar')
KFWS20151120_130030_V06.gz
('singlepart', <Bucket: bucket>, '/srv/nfs/storage/bucket/2015/11/20/KFWS/KFWS20151120_130030_V06.gz', '2015/11/20/KFWS/KFWS20151120_130030_V06.gz')
('single_part: ', '2015/11/20/KFWS/KFWS20151120_130030_V06.gz', '/srv/nfs/storage/bucket/2015/11/20/KFWS/KFWS20151120_130030_V06.gz')
KFWS20151120_131000_V06.gz
('iter: ', '/srv/nfs/storage/bucket/2015/11/20/KFWS/NWS_NEXRAD_NXL2DP_KFWS_20151120110000_20151120115959.tar')
KFWS20151120_110630_V06.gz
('singlepart', <Bucket: bucket>, '/srv/nfs/storage/bucket/2015/11/20/KFWS/KFWS20151120_110630_V06.gz', '2015/11/20/KFWS/KFWS20151120_110630_V06.gz')
('single_part: ', '2015/11/20/KFWS/KFWS20151120_110630_V06.gz', '/srv/nfs/storage/bucket/2015/11/20/KFWS/KFWS20151120_110630_V06.gz')
KFWS20151120_111601_V06.gz

它显示它正在进入single_part，对我来说，这意味着它至少是运行singlept函数并尝试上传一个对象但是没有创建Zimport_errors.list或Znoaa_nexrad_files.list而且我没有看到任何桶中的新对象。

下面的代码:(提前抱歉这是多么糟糕。我正在尝试自学python而且只有几个星期。）

http://pastebin.com/X56FHDaa

这是主要的块

def singlept(bucket, keyname, local_file):
    retries = 0
    key_size = 0
    local_size = os.path.getsize(local_file)
    while retries <= 4 and local_size != key_size:
        local_md5 = md5file(local_file=local_file)
        print('single_part: ', keyname, local_file)
        try:
            key = bucket.new_key(keyname)
        except Exception:
            print('couldn\'t create key: ', keyname)
            pass
        try:
            key.set_contents_from_filename(local_file)
            key_size = key.size
            with open(successfile, 'ab') as f:
                f.write('\n')
                f.write(str(local_file + ',' + keyname + ',' + str(key_size) + ',' + str(local_size)))
        except Exception:
            print('couldn\'t upload file: ', local_file, ' as key: ', keyname)
            with open(errorfile, 'ab') as f:
                f.write('\n')
                f.write(str(local_file + ',' + keyname + ',' + str(key_size) + ',' + str(local_size)))
            pass


for dir, subdir, files in os.walk(local_bucket):
    s3path = "/".join(str(dir).split('/')[5:])
    local_path = str(local_bucket + '/' + s3path)
    for fname in files:
        if fname.endswith("tar"):
            fullpath = local_path + '/' + fname
            if (debug):
                print('iter: ',fullpath)
            with tarfile.open(fullpath, 'r') as tarball:
                zips = tarball.getmembers()
                try:
                    tarball.extractall(path=local_path)
                except Exception:
                    with open(errorfile, 'ab') as f:
                        f.write('\n')
                        f.write(str(fullpath + ',' + str(os.path.getsize(fullpath))))
                    continue
            for zip in zips:
                if (debug):
                    print(zip.name)
                local_file = local_path + '/' + zip.name
                keyname = s3path + '/' + zip.name
                try:
                    if zip.size >= 1073741824:
                        if (debug):
                            print('multipart',bucket, local_file, keyname)
                        multipt(bucket, local_file, keyname)
                    else:
                        if (debug):
                            print('singlepart',bucket, local_file, keyname)
                        singlept(bucket, keyname, local_file)
                except Exception:
                    with open(errorfile, 'ab') as f:
                        f.write('\n')
                        f.write(str(local_file + "," + keyname))
                    continue
                if local_file.endswith("gz"):
                    try:
                        os.remove(local_file)
                    except Exception:
                        print('couldn\'t remove file: ', local_file)
                        continue

非常感谢你提前帮忙！我把头发拉出来！

编辑 - 直接添加代码并希望修复缩进！它看起来在Atom中没有正确粘贴。： - /

Answer 1

except Exception仅捕获类型为Exception的异常-请参见https://stackoverflow.com/a/18982726/264822。您应该尝试：

   try:
        key = bucket.new_key(keyname)
    except:
        print('couldn\'t create key: ', keyname)
        pass

python新手。为什么我的脚本不上传文件？

1 个答案: