另一個問題：電話字典問題'while-loop' using Error

Question

簡單的問題制作電話詞典

我想做的是把人的名字和號碼放在字典里！

示例我想做什么

Enter command (a, f, d, or q).: a

Enter new name................: Perry

Enter new phone number........: 229-449-9683


Enter command (a, f, d, or q).: f

Enter name to look up...: 

我想在輸入時找到全名和號碼

到目前為止我寫的電話字典代碼：

phone_dict = {}
command = input('Enter command (a, f, d, or q).: ')
newname = input('Enter new name................: ')
newphone = input('Enter new phone number........: ')
while True:
    if command == 'a':
        newname
        newphone
        phone_dict[newname] = newphone
        print(phone_dict)
# In here, 'while-loop' does not work. 

在那里，如果我輸入“a”命令，然后輸入名稱

字典應該是 { Perry: 229-449-9683}

謝謝，這個問題可能有點混亂，但如果你能幫助解決這個問題，我很高興！

Answer 1

要使用該人的名字或姓氏查找號碼，您可以：

a = 'Add a new phone number'
d = 'Delete a phone number'
f = 'Find a phone number'
q = 'Quit'
phone_dict = {}

while True:
    # Gets the user command every loop
    command = input('Enter command (a, f, d, or q).: ')

    # Add a new registry to the directory
    if command == 'a':
        newname = input('Enter new name................: ')
        newphone = input('Enter new phone number........: ')
        phone_dict[newname] = newphone
        print(phone_dict)

    # Find a registry on the directory
    elif command == "f"
        query = input("Enter name to look up...: ")
        match = None
        for key in phone_dict.keys():
            if query.strip() in key:
                match = phone_dict[key]
                break
        if match is None:
            print(f"The name {query} could not be found on the directory")
        else:
            print(f"The phone number of {query} is {match}")
    elif command == "d":
        # Delete registry
    elif command == "q":
        # Quits program
    else:
        print(f"The command {command} was not found, please try again!")

在這種情況下，我使用query.strip()刪除任何可能導致找不到此人的額外開始/結束空格。

請讓我知道這是否有幫助。 謝謝！

Answer 2

要從字典中查找結果，您可以遍歷項目並檢查鍵是否包含您要查找的字符串。 如果要獲取滿足查詢的所有值，可以創建另一個列表或字典並存儲找到的項目：

phone_dict = {
    "Han Perry": "1234",
    "Harry Gildong": "2345",
    "Hanny Test": "123",
}


find_str = "Han"

result = {}

for key, value in phone_dict.items():
    # Converting it to lower makes it case insensitive
    if find_str.lower().strip() in key.lower():
        result[key] = value

print(result)
# {'Han Perry': '1234', 'Hanny Test': '123'}

請注意，這將遍歷字典的所有值： O(n)