Question

我有1500行数据的列表，看起来像

USGS \ t 14211720 \ t 2017-02-12 22:00 \ t PST \ t 117000 \ t P 11.96 P

在我添加datetime行之前，dischargelist和gagheightList工作并给我一个1400行的计数但是当我添加日期时间时我得到了

TypeError: strptime() argument 1 must be str, not list" 
I am trying to pull the date, discharge and height to make two graphs

我的代码：

import csv

import datetime

dateList = []
dischargeList = []
gageheightList = []

readCSV = csv.reader(dataLines, delimiter = '\t')

for row in readCSV:
    date_str = [2]
    dateTIME = datetime.datetime.strptime(date_str,"%Y,%m,%d T%H:%M")
    dateList.append(dateTIME)

    discharge = row[4]
    dischargeList.append(discharge)
    gageheight = row[6]
    gageheightList.append(gageheight)

#print(dateList)
#this line was just to test if the dates were making it to a list    


print("we have {} items in the date list".format(len(dateList)))

print("we have {} items in thegage height list".format(len(gageheightList)))

print ("we have {} items in the discharge list".format(len(dischargeList)))

Answer 1

正如AJPennster所说，你应该知道如何使用datetime模块。以下代码是方法datetime.datetime.strptime(string, format)

的用法

import datetime

_str1 = "2017,02,12 22:00"
_str2 = "2017-02-12 22:00"

format_str1 = datetime.datetime.strptime(_str1, "%Y,%m,%d %H:%M")
format_str2 = datetime.datetime.strptime(_str1, "%Y-%m-%d %H:%M")

使用datetime.datetime.strptime(string, format)方法时，您应该严格按照您提供的srting格式填写格式参数。

Answer 2

date_str = [2]将date_str设置为包含2的列表。

这是你尝试做的原因

dateTIME = datetime.datetime.strptime(date_str,"%Y,%m,%d T%H:%M")

你得到了

TypeError: strptime() argument 1 must be str, not list"

将date_str = [2]更改为date_str = row[2]可以解决您的问题。

解析datetime.datetime.strptime时出现问题

2 个答案: