我尝试运行下面的代码，我希望在我选择日期和时间时显示每日特价但我似乎得到错误（字符串索引必须是整数，而不是str）当我运行代码。任何帮助表示赞赏。
def get_specials():
monday = {"B": "Horseradish omelet. Note: better than it sounds",
"L": "Momma's Curry. Note: Can be made spicy.",
"D": "Beef brisket. Note: COmes with au jus. That's pronounced 'Oh jhoo', not 'Ow Juice'"}
tuesday = {"B": "Sausage gravy over biscuits. Note: Toast can be subbed",
"L": "Grilled cheese and tomato soup. Note: We have vegan cheese",
"D": "Meatloaf. Note: Comes woth catsup on the top. Not optional"}
wednesday = {"B": "Horseradish omelet. Note: better than it sounds",
"L": "Momma's Curry. Note: Can be made spicy.",
"D": "Beef brisket. Note: COmes with au jus. That's pronounced 'Oh jhoo', not 'Ow Juice'"}
thursday = {"B": "Sausage gravy over biscuits. Note: Toast can be subbed",
"L": "Grilled cheese and tomato soup. Note: We have vegan cheese",
"D": "Meatloaf. Note: Comes woth catsup on the top. Not optional"}
friday = {"B": "Horseradish omelet. Note: better than it sounds",
"L": "Momma's Curry. Note: Can be made spicy.",
"D": "Beef brisket. Note: COmes with au jus. That's pronounced 'Oh jhoo', not 'Ow Juice'"}
saturday = {"B": "Sausage gravy over biscuits. Note: Toast can be subbed",
"L": "Grilled cheese and tomato soup. Note: We have vegan cheese",
"D": "Meatloaf. Note: Comes woth catsup on the top. Not optional"}
specials = {"M": "monday",
"T": "tuesday",
"W": "wednesday",
"R": "thursday",
"F": "friday",
"St": "saturday"}
return specials
def print_special(special):
print "The special is:"
print special
print "*"*15
def get_day():
while True:
day = raw_input ("Day (M/T/W/R/F/St): ")
if day.upper() in ["M", "T", "W", "R", "F", "ST"]:
return day.upper()
else:
print "I'm sorry, but {} isn't valid".format(day)
def get_time():
while True:
time = raw_input ("Time (B/L/D): ")
if time.upper() in ["B", "L", "D"]:
return time.upper()
else:
print "I'm sorry, but {} isn't valid".format(time)
def main():
specials = get_specials()
print "This script will tell you the specials for any day and time of the week"
while True:
day = get_day()
special = specials[day]
time = get_time()
print_special(special[time])
# ********************^^^^ HERE ^^^*
another = raw_input("Do you want to check another day and time?(Y/N): ")
if another.lower == "n":
break
main()
星号行是问题所在。 （星号不是代码的一部分，它只是突出显示特定行的错误）显示的错误如下。
Traceback (most recent call last):
line 62, in <module>
main()
line 57, in main
print_special(special[time])
TypeError: string indices must be integers, not str
答案 0 :(得分：1)
错误是因为strings会返回一个字典，其中的键和值均为string而不是键dict和值specials = {"M": monday,
"T": tuesday,
"W": wednesday,
"R": thursday,
"F": friday,
"St": saturday}
。所以将specials字典更改为
#include "device.h"
答案 1 :(得分：0)
问题在于：
print_special(special[time])
例如：
假设您的词典是：
monday = {"B": "Horseradish omelet. Note: better than it sounds",
"L": "Momma's Curry. Note: Can be made spicy.",
"D": "Beef brisket. Note: COmes with au jus. That's pronounced 'Oh jhoo', not 'Ow Juice'"}
我们想要＆＃39; B＆＃39;的价值所以你会这样做：
print(monday['B'])
但是你在做：
print('monday'['B'])
您可以查看：
day = get_day()
special = specials[day]
time = get_time()
print(type(special))
print(time)
输出中：
monday
<class 'str'>
B
建议你的代码： 您不需要额外的功能只是打印结果我已经修改了您的代码一点结帐：
def get_specials(day,time):
special_dish = {"monday": {"B": "Horseradish omelet. Note: better than it sounds",
"L": "Momma's Curry. Note: Can be made spicy.",
"D": "Beef brisket. Note: COmes with au jus. That's pronounced 'Oh jhoo', not 'Ow Juice'"},
"tuesday": {"B": "Sausage gravy over biscuits. Note: Toast can be subbed",
"L": "Grilled cheese and tomato soup. Note: We have vegan cheese",
"D": "Meatloaf. Note: Comes woth catsup on the top. Not optional"},
"wednesday": {"B": "Horseradish omelet. Note: better than it sounds",
"L": "Momma's Curry. Note: Can be made spicy.",
"D": "Beef brisket. Note: COmes with au jus. That's pronounced 'Oh jhoo', not 'Ow Juice'"},
"thursday": {"B": "Sausage gravy over biscuits. Note: Toast can be subbed",
"L": "Grilled cheese and tomato soup. Note: We have vegan cheese",
"D": "Meatloaf. Note: Comes woth catsup on the top. Not optional"},
"friday": {"B": "Horseradish omelet. Note: better than it sounds",
"L": "Momma's Curry. Note: Can be made spicy.",
"D": "Beef brisket. Note: COmes with au jus. That's pronounced 'Oh jhoo', not 'Ow Juice'"},
"saturday": {"B": "Sausage gravy over biscuits. Note: Toast can be subbed",
"L": "Grilled cheese and tomato soup. Note: We have vegan cheese",
"D": "Meatloaf. Note: Comes woth catsup on the top. Not optional"}}
specials = {"M": "monday",
"T": "tuesday",
"W": "wednesday",
"R": "thursday",
"F": "friday",
"St": "saturday"}
get_day=specials.get(day)
get_special=special_dish.get(get_day).get(time)
return "The special is: {}".format(get_special)
def get_day():
while True:
day = input ("Day (M/T/W/R/F/St): ")
if day.upper() in ["M", "T", "W", "R", "F", "ST"]:
return day.upper()
else:
print ("I'm sorry, but {} isn't valid".format(day))
def get_time():
while True:
time = input ("Time (B/L/D): ")
if time.upper() in ["B", "L", "D"]:
return time.upper()
else:
print ("I'm sorry, but {} isn't valid".format(time))
def main():
print ("This script will tell you the specials for any day and time of the week")
while True:
day = get_day()
time = get_time()
print(get_specials(day,time))
# ********************^^^^ HERE ^^^*
another = input("Do you want to check another day and time?(Y/N): ")
if another.lower == "n":
break
main()
输出：
This script will tell you the specials for any day and time of the week
Day (M/T/W/R/F/St): M
Time (B/L/D): B
The special is:Horseradish omelet. Note: better than it sounds
Do you want to check another day and time?(Y/N):