Python:需要超过 1 个值才能解包

Question

出现此错误我做错了什么？

    replacements = {}
    replacements["**"] = ("<strong>", "</strong>")
    replacements["__"] = ("<em>", "</em>")
    replacements["--"] = ("<blink>", "</blink>")
    replacements["=="] = ("<marquee>", "</marquee>")
    replacements["@@"] = ("<code>", "</code>")

    for delimiter, (open_tag, close_tag) in replacements: # error here
        message = self.replaceFormatting(delimiter, message, open_tag, close_tag); 

错误:

Traceback (most recent call last):
File "", line 1, in for doot, (a, b) in replacements: ValueError: need more than 1 value to unpack

所有值元组都有两个值。对吧？

Answer 1

应该是:

for delimiter, (open_tag, close_tag) in replacements.iteritems(): # or .items() in py3k