Python，在内存中写入zip到文件

Question

如何将内存zipfile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返回的内容StringIO ：

>>> 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'

试试以下：

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

修改了pytru3的falsetru的答案

1）使用io.StringIO而不是StringIO.StringIO

python3中的StringIO

2）使用b"abc"而不是"abc" ，或

python 3.5：TypeError：需要一个类似字节的对象，而不是写入文件时的'str'

3）编码为二进制字符串str.encode(s, "utf-8")

在Python 3中将字符串转换为字节的最佳方法？

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())

这也应该适用于gzip： 我如何在Python中压缩字符串？

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。