python valueerror：使用numpy解包的值太多

Question

我正在尝试将 excel 文件中的信息提取到 python 中，但出现此错误：

Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    main()
  File "C:\Users\viral\Desktop\python\test.py", line 5, in main
    date, time, temp = np.loadtxt('temperatures.csv', delimiter = ',', unpack = True, dtype = 'str')
ValueError: too many values to unpack

代码：

import numpy as np

def main():

    date, time, temp = np.loadtxt('temperature.csv', delimiter = ',', unpack = True, dtype = 'str')

    import itertools
    groups = itertools.groupby(zip(date, temp), lambda dv:dv[0])
    list_of_lists = [[d] + [v[1] for v in values] for d, values in groups]
    list_of_lists = list_of_lists[:len(list_of_lists)-1]
    x = 0 
    while (x < len(list_of_lists)):
        list_of_lists[x] = [float(i) for i in list_of_lists[x]]
        print list_of_lists[x]
        x += 1
    print len(list_of_lists)

excel 文件看起来像这样。它是csv格式：

请帮忙调试

来自 csv 文件的原始数据：

20130102        9:30:00 AM      34.75
20130102        9:31:00 AM      34.66
20130102        9:32:00 AM      34.6
20130102        9:33:00 AM      34.6
20130102        9:34:00 AM      34.61
20130102        9:35:00 AM      34.65
20130102        9:36:00 AM      34.65

持续 65,208 行

Answer 1

没关系。我想到了。有太多行需要解包。当我将 csv 文件分成 2 个文件，每个文件有约 30k 行时，它起作用了