python - Python Error Typerror in first script (NEW request at bottom)

Question

The point of the script is to tell you what day of the week it will be after 'X' amount of days from a given day.

I've been learning how to code for a few hours so bear with me.

    # Prompt the user for input
print("This scipt is useful in finding out what day of the week it \
will be after 'X' ammount of days in relation to the current date.")
sunday = Sunday = 0
monday = Monday = 1
tuesday = Tuesday = 2
wednesday = Wednesday = 3
thursday = Thursday = 4
friday = Friday = 5
saturday = Saturday = 6
print(" ")
todaysDate = input("Enter todays date: ")
daysFromToday = int(input("Enter a integer for days from today: "))


# Compute equasion

daysFromDate = ((todaysDate + daysFromToday) % 7)


# Display results
print(" ")
print("Today is", todaysDate, "and in", daysFromToday, "days it will be", daysFromDate)
print("  ")
print("Sunday = 0, \
Monday = 1, \
Tuesday = 2, \
Wednesday = 3, \
Thursday = 4, \
Friday = 5,   \
Saturday = 6")
input("Press enter to close: ")

My error is

Traceback (most recent call last):
  File "C:\Desktop\daysfromdate.py", line 18, in <module>
    daysFromDate = ((todaysDate + daysFromToday) % 7)
TypeError: Can't convert 'int' object to str implicitly

I fixed by using

todaysDate = eval(input("Enter todays date: "))

now my script runs fine, but last question is how do I make it answer with the word version of the variables?

Current output is

Today is 0 and in 100 days it will be 2

I would like it to be

Today is Sunday in 100 days it will be Tuesday

Answer 1

我认为您使用的是 Python 3.x？如果是这样，那么

todaysDate = input("Enter todays date: ")

将返回一个字符串 ( str) 对象，您应该像对daysFromToday. IE，

todaysDate = int(input("Enter todays date: "))

（在较旧的 Python 版本中，input会为您执行此转换。）

编辑：好的，我明白你在做什么。请考虑不要为此使用eval，因为这eval是一个非常不安全的结构，允许用户执行任意代码。更清洁的解决方案是：

weekdays = {"sunday": 0,
            "monday": 1,
            ...
            "saturday": 6}
dayoftheweek = weekdays[input("Enter the day of the week: ")]

Answer 2

您的代码实际上在我的 python 版本上运行，但是您的问题可能与您的变量“todaysDate”有关，您尚未将其转换为 int。尝试改变：

todaysDate = input("Enter todays date: ")

至：

todaysDate = int(input("Enter todays date: "))

看看是否有帮助。