连接到 ftp 并下载文件

Question

我正在尝试从 ftp 下载特定文件，但在尝试连接

时出现错误

import ftplib
url = 'ftp://ftp.ensemblgenomes.org/pub/release-41/bacteria//fasta/bacteria_176_collection/_bacillus_aminovorans/cdna/'
ftp = ftplib.FTP(url)

我得到的错误：UnicodeError: encoding with 'idna' codec failed (UnicodeError: label too long)

Answer 1

url = 'ftp://ftp.ensemblgenomes.org/pub/release-41/bacteria//fasta/bacteria_176_collection/_bacillus_aminovorans/cdna/'
ftp = ftplib.FTP(url)

来自the documentation of ftplib：

class ftplib.FTP(host='', user='', passwd='', acct='', timeout=None, source_address=None)
Return a new instance of the FTP class. When host is given, the method call connect(host) is made.

换句话说：第一个参数应该只是主机名，而不是 URL 和 protocol://host/path。如果您想连接到服务器并使服务器更改为特定路径，则需要分步执行：

ftp = ftplib.FTP('ftp.ensemblgenomes.org','ftp','user@example.com')
ftp.cwd('/pub/release-41/bacteria//fasta/bacteria_176_collection/_bacillus_aminovorans/cdna/')

连接到 ftp 并下载文件

connect to ftp and download file

python

ftp

ftplib

python-3.x