問(wèn)題描述

我對(duì) Python 還很陌生.目前我正在制作一個(gè)原型，它可以拍攝一張圖片，從中創(chuàng)建一個(gè)縮略圖并將其上傳到 ftp 服務(wù)器.

I'm fairly new to Python. Currently I'm making a prototype that takes an image, creates a thumbnail out of it and and uploads it to the ftp server.

到目前為止，我已經(jīng)準(zhǔn)備好獲取圖像、轉(zhuǎn)換和調(diào)整大小.

So far I got the get image, convert and resize part ready.

我遇到的問(wèn)題是使用 PIL(枕頭)圖像庫(kù)轉(zhuǎn)換圖像的類(lèi)型與使用 storebinary() 上傳時(shí)可以使用的類(lèi)型不同

The problem I run into is that using the PIL (pillow) Image library converts the image is a different type than that can be used when uploading using storebinary()

我已經(jīng)嘗試了一些方法，例如使用 StringIO 或 BufferIO 將圖像保存在內(nèi)存中.但是我一直在出錯(cuò).有時(shí)圖像確實(shí)已上傳，但文件似乎為空(0 字節(jié)).

I already tried some approaches like using StringIO or BufferIO to save the image in-memory. But I'm getting errors all the time. Sometimes the image does get uploaded but the file appears to be empty (0 bytes).

這是我正在使用的代碼:

Here is the code I'm working with:

import os
import io
import StringIO
import rawpy
import imageio
import Image
import ftplib

# connection part is working
ftp = ftplib.FTP('bananas.com')
ftp.login(user="banana", passwd="bananas")
ftp.cwd("/public_html/upload")

def convert_raw():
    files = os.listdir("/home/pi/Desktop/photos")

    for file in files:
        if file.endswith(".NEF") or file.endswith(".CR2"):
            raw = rawpy.imread(file)
            rgb = raw.postprocess()
            im = Image.fromarray(rgb)
            size = 1000, 1000
            im.thumbnail(size)

            ftp.storbinary('STOR Obama.jpg', img)
            temp.close()
    ftp.quit()

convert_raw()

我嘗試了什么:

temp = StringIO.StringIO
im.save(temp, format="png")
img = im.tostring()
temp.seek(0)
imgObj = temp.getvalue()

我得到的錯(cuò)誤在于 ftp.storbinary('STOR Obama.jpg', img).

消息:

buf = fp.read(blocksize)
attributeError: 'str' object has no attribute read

推薦答案

不要將字符串傳遞給 storbinary.您應(yīng)該將文件或文件對(duì)象(內(nèi)存映射文件)傳遞給它.此外，這一行應(yīng)該是 temp = StringIO.StringIO().所以:

Do not pass a string to storbinary. You should pass a file or file object (memory-mapped file) to it instead. Also, this line should be temp = StringIO.StringIO(). So:

temp = StringIO.StringIO() # this is a file object
im.save(temp, format="png") # save the content to temp
ftp.storbinary('STOR Obama.jpg', temp) # upload temp

這篇關(guān)于如何將圖像保存在內(nèi)存中并使用 PIL 上傳?的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，也希望大家多多支持html5模板網(wǎng)！