(Python) IndexError: list index out of range

Question

这个函数：

def assisted_by(self, players):
    text = self.event_text.split('Assisted')
    if len(text) > 1:
       print ([i for i in players if i in text[1]])
       return [i for i in players if i in text[1]][0]
    else:
       return 'N/A'

打印数百个项目并以一个空列表结束：

(...)

['Kelechi Iheanacho']
['James Maddison']
['Wilfried Zaha']
['Emiliano Buendia']
[]

返回以下错误：

  File "data_gathering.py", line 1057, in assisted_by
    return [i for i in players if i in text[1]][0]
IndexError: list index out of range

如何在不删除 [0] 索引的情况下修复此错误？

Answer 1

您无法从空列表中获取项目 0。您可以在尝试之前检查长度：

def assisted_by(self, players):
    text = self.event_text.split('Assisted')
    if len(text) > 1:
        data = [i for i in players if i in text[1]]
        print(data)
        if data:
            return data[0]
    return 'N/A'

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(Python) IndexError: list index out of range

(Python) IndexError: list index out of range

python

list

index-error