問題描述
我對 Python 還很陌生.目前我正在制作一個原型，它可以拍攝一張圖片，從中創建一個縮略圖并將其上傳到 ftp 服務器.
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，我已經準備好獲取圖像、轉換和調整大小.
So far I got the get image, convert and resize part ready.
我遇到的問題是使用 PIL(枕頭)圖像庫轉換圖像的類型與使用 storebinary() 上傳時可以使用的類型不同
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()
我已經嘗試了一些方法，例如使用 StringIO 或 BufferIO 將圖像保存在內存中.但是我一直在出錯.有時圖像確實已上傳，但文件似乎為空(0 字節).
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.您應該將文件或文件對象(內存映射文件)傳遞給它.此外，這一行應該是 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
這篇關于如何將圖像保存在內存中并使用 PIL 上傳?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！