Question

我想学习的是如何允许用户创建名称列表，然后在每个名称上附加一个数字，以便用户以后查找。我什至不确定数据库是否是正确的术语。

我能够允许用户创建一个数字列表，但是我不知道该如何做，让用户列出一个名称列表，然后附加两个名称，以便用户可以查找名称并找到他们的姓名在创建列表后得分。

list_of_nums = []
loop = True
while loop == True:
    try: num = int(input("Enter Integer, 0 to end: "))
    except ValueError: num = "invalid"
    if num == "invalid": print("\nPlease Print A Valid Integer!\n");
    elif num != 0: list_of_nums.append(num)
    else: loop = False
print(list_of_nums)

Answer 1

您应该先学习泡菜：https://docs.python.org/3/library/pickle.html

一旦您有了大致的了解，请掌握sqlite的用法。 The raw sqlite please，以使自己了解SQL语言。这不是ansi sql，但很流行并且足够接近。

Then use some query builder帮助您掌握your next data ba se。

最后，关于数字，姓名和分数的问题，请尝试使用同一循环询问所有所需信息，或者尝试使用更多循环。

我觉得您正在学习python，因此您可以参加codecademy.com的python课程。这样可以避免麻烦。

Answer 2

如果您只想将这些输入临时保存在列表中，则应执行以下操作：

list_of_nums = []

num = 1

while num:
    try:
        num = int(input("Enter a integer, 0 to end: "))
    except:
        print("Enter a integer number")
    list_of_nums.append(num)

print(list_of_nums)

编辑：

但是，如果要配对值，最好使用字典：

grades = {}

num = 1

while True:
    try:
        name = input("Name: ")
        num = int(input("Grade, -1 to end: ")) # the person can also take 0!
    except:
        print("ENTER A INTEGER NUMBER!")
        continue

    if num == -1:
        break # break the loop

    # if <num> isn't between 0 and 10:
    if num < 0 or num > 10: # or the minimum and max values you want
        print("ENTER A GRADE BETWEEN 0 AND 10!")
        continue

    grades[name] = num # You can acess <num> with grades[name]


#SHOW THE GRADES IN ALPHABETIC ORDER
grades_in_order = []
#thats how you iterate a dictionary
#you get the keys with a for, and access that key like a list index
for name in grades:
    grades_in_order.append(name)

grades_in_order.sort()

print("\n\nGrades:")

for name in grades_in_order:
    print(name, grades[name], sep='\t') # the sep is optional

这里是运行示例：

Name: Iago
Grade, -1 to end: Invalid
ENTER A INTEGER NUMBER!
Name: Hano
Grade, -1 to end: 11
ENTER A GRADE BETWEEN 0 AND 10!
Name: Iago
Grade, -1 to end: -2
ENTER A GRADE BETWEEN 0 AND 10!
Name: Hano
Grade, -1 to end: 10
Name: Iago
Grade, -1 to end: 10
Name: Nick
Grade, -1 to end: 0
Name: Mary
Grade, -1 to end: 9
Name: Jane
Grade, -1 to end: 7
Name: DOESNT MATTER
Grade, -1 to end: -1


Grades:
Hano    10
Iago    10
Jane    7
Mary    9
Nick    0

创建一个“数据库”

2 个答案: