Question

我一直在玩一个试图更好地学习如何用Python编码的数据集。

我创建的代码完美无缺，但仅适用于CSV文件的一行（我有571行数据）。这将获取行，然后将第一个数字与第二个数字进行比较，具体取决于第一个数字是大于还是小，它会将该数字放入相应的列表中。然后代码移动到下一个值并执行相同的操作。

bigger = []
smaller = []
mL_ind = 1
add = 0
add_s = 0

gross = []
largest_val = []
net_total = []


initial = open('output.csv')
reader = csv.reader(initial)
mathLine = [line.split(',')[1] for line in initial]
del mathLine[0]
mathLine = list(map(float, mathLine))

for value in mathLine:
    if value > mathLine[mL_ind]:
        bigger.append(value)
        mL_ind = mL_ind + 1
    elif value < mathLine[mL_ind]:
        smaller.append(value)
        mL_ind = mL_ind + 1

for value in bigger:
    add = value + add

for value in smaller:
    add_s = value + add_s

total = add - add_s
gross.append(total)

largest = max(mathLine)
largest_val.append(largest)

net = total / largest
net_total.append(net)

我试图做的是使用索引（在line.split之后）：mathLine = [line.split（＆＃39;，＆＃39;）[1] for line in initial] 作为迭代来移动CSV文件，以及作为我的while循环的计数器。但是，当我设置此项时，我会收到此行的错误：if value＆gt; mathLine [mL_ind]

非常感谢任何帮助

Answer 1

这对我有用......

导入csv

bigger = []
smaller = []
mL_ind = 1

add = 0
add_s = 0

gross = []
largest_val = []
net_total = []

initial = open('dummy.csv')
reader = csv.reader(initial)


mathLine = [line.split(',')[1] for line in initial]

print (mathLine)


del mathLine[0]
mathLine = list(map(float, mathLine))

for value in mathLine[:-1]:
    if value > mathLine[mL_ind]:
        bigger.append(value)
        mL_ind += 1
    elif value < mathLine[mL_ind]:
        smaller.append(value)
        mL_ind += 1


for value in bigger:
    add = value + add

for value in smaller:
    add_s = value + add_s

total = add - add_s
gross.append(total)

largest = max(mathLine)
largest_val.append(largest)

net = total / largest
net_total.append(net)

print (net_total)

尝试实现while循环会破坏代码

1 个答案: