问题描述
我正在python中创建一个工作日志,用户可以在其中输入任务或可以按日期查找任务.我的初始提示要求用户按日期输入任务或查找.如果用户从按日期查找开始,则该程序可以正常工作并显示所有日期.如果用户首先添加任务,然后按日期查找任务,则程序将显示对象不支持索引错误".我认为出于某种原因,该列表已被清空,但是我一生无法理解这种情况可能在何时何地发生.这是主要的工作日志文件:
I'm creating a work log in python where a user can enter a task or can lookup a task by date. My initial prompt asks user to either enter a task or lookup by date. If the user starts by looking up by date--the program works correctly and displays all dates. If a user starts by adding a task, and then looking up tasks by date, the program displays an 'object does not support indexing error'. I think for some reason, the list is getting emptied, but i can't for the life of me understand where or when this might be happening. Here is main worklog file:
import csv
import re
import datetime
from task import Task
from task_list import TaskList
class Worklog():
def __init__(self):
self.filename = "work_log.csv"
self.tasklist = TaskList()
self.tasklist.read_task_from_file(self.filename)
def search_by_date(self):
for d, i in enumerate(self.tasklist.dates()):
print(d+1, ':', i)
# while True:
# datereq = input("Select Number To See Tasks For A Date").strip().lower()
# try:
# datereq = int(datereq)
# return datereq
# except ValueError:
# print("Invalid Entry. Please try again")
# continue
def search_by_time(self):
pass
def exact_search(self):
pass
def pattern_search(self):
pass
def add_task(self):
task = Task()
task.input_task()
task.input_minutes()
task.input_notes()
task.date = datetime.date.today()
self.tasklist.app_task(task)
self.tasklist.save_task_to_file(self.filename,task)
def lookup_task(self):
if len(self.tasklist.task_list) == 0:
print("Your task log is empty.\n")
input("Hit Enter to add a new task.")
else:
while True:
lookup = input("Lookup by Date(D), Time(T), Exact Search(E) or Pattern(P): ")
lookup.lower()
if lookup == 'd':
self.search_by_date()
break
elif lookup == 't':
self.search_by_time()
break
elif lookup == 'e':
self.exact_search()
break
elif lookup == 'p':
self.pattern_search()
break
else:
print("Sorry invalid option. Please try again")
def start_message(self):
while True:
q = input("Add New Task(1) or Lookup Task(2) or Quit(3): ".strip().lower())
if q == "1":
self.add_task()
elif q == "2":
self.lookup_task()
elif q == "3":
exit()
else:
print("Sorry that's an invalid entry. Please try again.")
continue
if __name__ == '__main__':
log = Worklog()
log.start_message()
错误指向 dates 函数,下面显示了该函数以及任务列表"类的其他一些方法.我索引此列表的方式是否有问题?还是我的意思是,当用户进入循环的第二步时,task_list列表正在以某种方式重置.谢谢:
The error is pointing to the dates function which is shown below along with a few of the other methods for my 'task-list' class. Is there an issue with the way that I am indexing this list? Or am i right in that the task_list list is getting reset somehow when the user enters the second step of the loop. Thanks:
def app_task(self, task):
self.task_list.append(task)
def save_task_to_file(self,filename,task):
with open(filename, 'a', newline="\n", encoding="utf-8") as csvfile:
# creating a csv writer object
csvwriter = csv.writer(csvfile, delimiter=",")
# writing the data rows
csvwriter.writerow([task.date, task.task, task.minutes, task.notes])
def read_task_from_file(self,filename):
with open(filename, 'r') as csvfile:
task_reader = csv.reader(csvfile, delimiter=',')
for row in task_reader:
task = Task()
self.task_list.append(row)
return self.task_list
def dates(self):
self.read_task_from_file("work_log.csv")
dates = []
for row in self.task_list:
date = row[0]
if row[0] not in dates:
dates.append(date)
return sorted(dates)
注意-以下是work_log.csv文件的示例:
Note--here is an example of what the work_log.csv file looks like:
2017-03-23,gardening,30,not really
2017-03-23,bowling,30,none
2017-03-23,bowling,90,none
2017-03-23,bowling,93,none
2017-03-23,baseball,2,none
2017-03-23,bowling,20,none
2017-03-23,base,0,jj
2017-03-23,bowling,33,none
根据Jake的推荐添加:
Added per Jake's recommendation:
def get_date(self):
for row in self.task_list:
d = row[0]
return d
def dates(self):
dates = []
for row in dates:
date = row.get_date()
if date not in dates:
dates.append(date)
return sorted(dates)
推荐答案
问题似乎出在您呼叫date = row[0]
的地方;这是因为在循环遍历self.task_list
时,循环row
将是Task
对象.在这种情况下,您尝试索引到未设置为建立索引的Task
对象.
The issue appears to be where you call date = row[0]
; this is because in the loop row
will be a Task
object as you are iterating over self.task_list
. In this case you are trying to index into a Task
object, which is not set up for indexing.
一个简单的解决方案是将row[0]
替换为row.date
;它将直接访问row
对象的date
字段,而无需费心处理所有索引.
The simple solution for this would be to replace row[0]
with row.date
; which will directly access the date
field of the row
object, without needing to bother about indexing at all.
这篇关于对象不支持索引的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!