根据zip文件标准：http://www.pkware.com/documents/casestudies/APPNOTE.TXT http://www.pkware.com/documents/casestudies/APPNOTE.TXT它还支持将 zip 文件拆分为多个文件：
Spanned/Split archives created using PKZIP for Windows
(V2.50 or greater), PKZIP Command Line (V2.50 or greater),
or PKZIP Explorer will include a special spanning
signature as the first 4 bytes of the first segment of
the archive. This signature (0x08074b50) will be
followed immediately by the local header signature for
the first file in the archive.
A special spanning marker may also appear in spanned/split
archives if the spanning or splitting process starts but
only requires one segment. In this case the 0x08074b50
signature will be replaced with the temporary spanning
marker signature of 0x30304b50. Split archives can
only be uncompressed by other versions of PKZIP that
know how to create a split archive.
The signature value 0x08074b50 is also used by some
ZIP implementations as a marker for the Data Descriptor
record. Conflict in this alternate assignment can be
avoided by ensuring the position of the signature
within the ZIP file to determine the use for which it
is intended.
知道如何检查该签名或其他方式来检查 zip 是否拆分为多个文件吗？
他们在标准中谈论的特定签名，即PK\007\008根本不由 zipfile 处理，通过 grep 库源代码可以看出（我使用 Python 3.2 得到了相同的结果）：
# grep PK /usr/lib/python2.7/zipfile.py
stringEndArchive = "PK\005\006"
stringCentralDir = "PK\001\002"
stringFileHeader = "PK\003\004"
stringEndArchive64Locator = "PK\x06\x07"
stringEndArchive64 = "PK\x06\x06"
所以我怀疑你是否可以使用该库来实现此目的。不妨尝试通过扩展库自己找到该签名。
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