我做错的地方，任何人都可以检查我收到了keyerror：1

达山

import csv
year = []
col1 = []
col2 = []
col3 = []
col4 = []
filename = open('data.csv', 'r')
file = csv.DictReader(filename)
for col in file:
    year.append(col['Year (Upto 31st March) (Col.1)'])
    col1.append(col['Central - Motor Vehicle & Accessories - Import Duty (Col.2)'])
    col2.append(col['Central - Tyres and Tubes - Import Duty (Col.4)'])
    col3.append(col['Central - High Speed Diesel Oil - Import Duty (Col.6)'])
    col4.append(col['Central - Motor Spirit - Import Duty (Col.8)'])
    
def column_selection():
    for i in range(1, 5):
        col[i] = [float(j) for j in col[i]]
        for k in range(1, 5):
            a[k] = max(col[i])
def index_printing():
    for i in range(1,5):
        a[i] = col[i].index(a[k])    
        print(year[a[i]])

column_selection()
index_printing()

蒂姆·罗伯茨

尝试这个。您的代码在如何使用 array 方面令人困惑a，但我认为这是要点。真的，你应该告诉我们你在这里想做什么。

import csv
year = []
col = [[],[],[],[]]
filename = open('data.csv', 'r')
file = csv.DictReader(filename)
for column in file:
    year.append(column['Year (Upto 31st March) (Col.1)'])
    col[0].append(column['Central - Motor Vehicle & Accessories - Import Duty (Col.2)'])
    col[1].append(column['Central - Tyres and Tubes - Import Duty (Col.4)'])
    col[2].append(column['Central - High Speed Diesel Oil - Import Duty (Col.6)'])
    col[3].append(column['Central - Motor Spirit - Import Duty (Col.8)'])
    
def column_selection():
    maxes = []
    for i in range(4):
        col[i] = [float(j) for j in col[i]]
        maxes.append( max(col[i]) )
    return maxes

def index_printing(maxes):
    for c,m in zip(col,maxes):
        z = c.index(m)    
        print(year[z])

m = column_selection()
index_printing(m)

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