Question

如何将内存zip文件写入文件？

# Create in memory zip and add files
zf = zipfile.ZipFile(StringIO.StringIO(), mode='w',compression=zipfile.ZIP_DEFLATED)
zf.writestr('file1.txt', "hi")
zf.writestr('file2.txt', "hi")

# Need to write it out
f = file("C:/path/my_zip.zip", "w")
f.write(zf)  # what to do here? Also tried f.write(zf.read())

f.close()
zf.close()

Answer 1

StringIO.getvalue返回StringIO的内容：

>>> import StringIO
>>> f = StringIO.StringIO()
>>> f.write('asdf')
>>> f.getvalue()
'asdf'

或者，您可以使用seek更改文件的位置：

>>> f.read()
''
>>> f.seek(0)
>>> f.read()
'asdf'

请尝试以下操作：

mf = StringIO.StringIO()
with zipfile.ZipFile(mf, mode='w', compression=zipfile.ZIP_DEFLATED) as zf:
    zf.writestr('file1.txt', "hi")
    zf.writestr('file2.txt', "hi")

with open("C:/path/my_zip.zip", "wb") as f: # use `wb` mode
    f.write(mf.getvalue())

Answer 2

修改python3的falsetru的答案

1）使用io.StringIO代替StringIO.StringIO

StringIO in python3

2）使用b"abc"代替"abc"或

python 3.5: TypeError: a bytes-like object is required, not 'str' when writing to a file

3）编码为二进制字符串str.encode(s, "utf-8")

Best way to convert string to bytes in Python 3?

import zipfile
import io
mf = io.BytesIO()

with zipfile.ZipFile(mf, mode="w",compression=zipfile.ZIP_DEFLATED) as zf:

    zf.writestr('file1.txt', b"hi")

    zf.writestr('file2.txt', str.encode("hi"))
    zf.writestr('file3.txt', str.encode("hi",'utf-8'))


with open("a.txt.zip", "wb") as f: # use `wb` mode
    f.write(mf.getvalue())

这也适用于gzip：How do I gzip compress a string in Python?

Answer 3

  with ZipFile(read_file, 'r') as zipread:
        with ZipFile(file_write_buffer, 'w', ZIP_DEFLATED) as zipwrite:
            for item in zipread.infolist():
                # Copy all ZipInfo attributes for each file since defaults are not preseved
                dest.CRC = item.CRC
                dest.date_time = item.date_time
                dest.create_system = item.create_system
                dest.compress_type = item.compress_type
                dest.external_attr = item.external_attr
                dest.compress_size = item.compress_size
                dest.file_size = item.file_size
                dest.header_offset = item.header_offset

如果zip文件读取损坏并且您注意到丢失的符号链接或带有错误时间戳的损坏文件，则可能是文件属性未被复制。

上面的代码片段是我解决问题的方法。

Python，在内存中写入zip到文件

3 个答案: