Python 错误:“ValueError:需要超过 1 个值才能解压"

Python Error: quot;ValueError: need more than 1 value to unpackquot;(Python 错误:“ValueError:需要超过 1 个值才能解压)

问题描述

在 Python 中，当我运行这段代码时:

In Python, when I run this code:

from sys import argv

script, user_name =argv
prompt = '>'

print "Hi %s, I'm the %s script." % (user_name, script)

我收到此错误:

Traceback (most recent call last):  
script, user_name =argv  
ValueError: need more than 1 value to unpack

这个错误是什么意思?

推荐答案

可能你没有在命令行上提供参数.在这种情况下，sys.argv 只包含一个值，但它必须有两个才能为 user_name 和 script 提供值.

Probably you didn't provide an argument on the command line. In that case, sys.argv only contains one value, but it would have to have two in order to provide values for both user_name and script.

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