迭代对应于Python中列表的字典键值

迭代对应于Python中列表的字典键值

您有几种选择可以遍历字典。

如果迭代字典本身（

for team inleague

），则将迭代字典的键。当使用for循环进行循环时，无论您是在dict（

league

）本身上循环还是在以下情况下，行为都是相同的

league.keys()

：

for team in league.keys():    runs_scored, runs_allowed = map(float, league[team])

您还可以通过迭代遍历键和值一次

league.items()

：

for team, runs in league.items():    runs_scored, runs_allowed = map(float, runs)

您甚至可以在迭代时执行元组拆包：

for team, (runs_scored, runs_allowed) in league.items():    runs_scored = float(runs_scored)    runs_allowed = float(runs_allowed)