[英]python: list index of out of range
for row in c:
c1.append(row[0:13])
for row in c1:
row.append(float(row[13])/100)
row.append(float(row[12])/float(row[13])/100)
row.append(math.log10(float(row[12])))
c
contains a csv file with many rows and columns c1
is a subset of c
containing only the first 14 elements c
包含具有许多行和列的csv文件c1
是c
的子集,仅包含前14个元素
i am getting IndexError: list index out of range
on row.append(float(row[13])/100)
我收到
IndexError: list index out of range
row.append(float(row[13])/100)
上的IndexError: list index out of range
does anyone know what i am doing wrong? 有人知道我在做什么错吗?
The rows in c1 don't actually contain 14 elements, they contain 13. c1中的行实际上并不包含14个元素,而是包含13个元素。
The second index in a slice is non-inclusive. 切片中的第二个索引是非包含性的。 When you append
row[0:13]
to c1
you are appending from element 0 to the element before 13. Hence, there are only 13 elements. 当您将
row[0:13]
附加到c1
您是将元素0附加到13 之前的元素。因此,只有13个元素。
This is why you get IndexError: list index out of range
on row.append(float(row[13])/100)
. 这就是为什么出现
IndexError: list index out of range
row.append(float(row[13])/100)
上的IndexError: list index out of range
。 row[13]
is an attempt to access a non-existent 14th element. row[13]
试图访问不存在的第14个元素。
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