我要读取csv文件中的第一列时间信息，格式是M/D/Y，但是程序报错，之前也在网上搜过，仍无法解决

Question

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.dates as mdates
date,Open = np.loadtxt('E:/000001.csv', delimiter=',',
                       skiprows=1,converters={0:mdates.strpdate2num('%m/%d/%Y')}, usecols= (0,1), unpack=True)

程序报错
TypeError: strptime() argument 0 must be str, not <class 'bytes'>

Answer 1

must be str, not <class 'bytes'>

Answer 2

并没有错。

a,b,c
12/12/2017,0,0

# -*- coding: utf-8 -*-

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.dates as mdates
date,Open = np.loadtxt('/home/zys/temp/a.csv', delimiter=',',
                       skiprows=1,converters={0:mdates.strpdate2num('%m/%d/%Y')}, usecols= (0,1), unpack=True)

Answer 3

你在python2.x中，{0:mdates.strpdate2num('%m/%d/%Y')}这么写是没问题的，但你可能版本是python3.x,应该改为{0:mdates.bytespdate2num('%m/%d/%Y')}这样就没问题了