9

我正在使用 Python 3.4 通过 FTP 上传一个大文件。

我希望能够在上传文件时显示进度百分比。这是我的代码：

from ftplib import FTP
import os.path

# Init
sizeWritten = 0
totalSize = os.path.getsize('test.zip')
print('Total file size : ' + str(round(totalSize / 1024 / 1024 ,1)) + ' Mb')

# Define a handle to print the percentage uploaded
def handle(block):
    sizeWritten += 1024 # this line fail because sizeWritten is not initialized.
    percentComplete = sizeWritten / totalSize
    print(str(percentComplete) + " percent complete")

# Open FTP connection
ftp = FTP('website.com')
ftp.login('user','password')

# Open the file and upload it
file = open('test.zip', 'rb')
ftp.storbinary('STOR test.zip', file, 1024, handle)

# Close the connection and the file
ftp.quit()
file.close()

如何在句柄函数中读取已经读取的块数？

更新

阅读 cmd 的答案后，我将其添加到我的代码中：

class FtpUploadTracker:
    sizeWritten = 0
    totalSize = 0
    lastShownPercent = 0
    
    def __init__(self, totalSize):
        self.totalSize = totalSize
    
    def handle(self, block):
        self.sizeWritten += 1024
        percentComplete = round((self.sizeWritten / self.totalSize) * 100)
        
        if (self.lastShownPercent != percentComplete):
            self.lastShownPercent = percentComplete
            print(str(percentComplete) + " percent complete")

我这样称呼 FTP 上传：

uploadTracker = FtpUploadTracker(int(totalSize))
ftp.storbinary('STOR test.zip', file, 1024, uploadTracker.handle)
4

1 回答 1

5

我能想到三种非 hacky 的方式。然后全部转移变量的“所有权”：

  1. 将值传入并返回结果（基本上意味着它存储在调用者中）
  2. 将值设为全局，并将其初始化为 0 和文件顶部。（阅读global关键字）
  3. 将此函数作为类的成员函数来处理上传跟踪。然后创建sizeWritten该类的实例变量。
于 2014-02-24T20:23:53.057 回答