它只打印 1 个字母

Question

我正在尝试用 tkinter 做我的第一个项目：它是一个 gui 密码生成器（我已经用 python 完成了一个非 gui 密码生成器，所以我确信生成它的代码是可以的）但我遇到了麻烦返回最终密码。 它只给了我一封信。 这是我的代码：

import tkinter as tk
import random

root = tk.Tk()

canvas = tk.Canvas(root, width=600, height=350)
canvas.grid()

#Labels
label1 = tk.Label(root, text = "How many characters?")
label1.place(x = 30, y = 50)
label2 = tk.Label(root, text = "How many passwords?")
label2.place(x = 30, y = 100)

#Entry box
box1 = tk.Entry(width = 20)
box1.place(x = 200, y = 50)


def password_generator():
    characters = "abcdefghilmopqrstuvzxwjkyèàòìùABCDEFGHILMNOPQRSTUVZWJKYX1234567890!£$%&/()=?^*§ç°:_;€"
    pass_lenght = int(box1.get())
    num_pass = int(box2.get())
    for x in range(0, pass_lenght):
        empty_password = ""
        real_password = random.choice(characters)
        empty_password = empty_password + real_password
        final = empty_password
        box3 = tk.Entry(width = 50, text='')
        box3.place(x = 50, y = 250)
        box3.insert(0, final)
#Button
button = tk.Button(root, text = "Commit", command = password_generator)
button.place(x = 260, y = 150)


root.mainloop()

Answer 1

问题是您在每个循环中都重新定义了 empty_password，您需要将其移出：

def password_generator():
    characters = "abcdefghilmopqrstuvzxwjkyèàòìùABCDEFGHILMNOPQRSTUVZWJKYX1234567890!£$%&/()=?^*§ç°:_;€"
    pass_lenght = int(box1.get())
    num_pass = int(box2.get())
    empty_password = ""
    for x in range(0, pass_lenght):
        real_password = random.choice(characters)
        empty_password = empty_password + real_password
        final = empty_password
        box3 = tk.Entry(width = 50, text='')
        box3.place(x = 50, y = 250)
        box3.insert(0, final)

Answer 2

似乎这个问题是由您的 for 循环中包含或不包含的内容引起的。 请参阅我在下面测试的解决方案：

import tkinter as tk
import random

root = tk.Tk()

canvas = tk.Canvas(root, width=600, height=350)
canvas.grid()

#Labels
label1 = tk.Label(root, text = "How many characters?")
label1.place(x = 30, y = 50)
label2 = tk.Label(root, text = "How many passwords?")
label2.place(x = 30, y = 100)

#Entry box
box1 = tk.Entry(width = 20)
box1.place(x = 200, y = 50)

def password_generator():
    characters = "abcdefghilmopqrstuvzxwjkyèàòìùABCDEFGHILMNOPQRSTUVZWJKYX1234567890!£$%&/()=?^*§ç°:_;€"
    pass_lenght = int(box1.get())

    empty_password = ""  # Needs to be initialized BEFORE the loop, otherwise the value resets each time
    for x in range(0, pass_lenght):
        real_password = random.choice(characters)
        empty_password = empty_password + real_password
        final = empty_password

    # Add the final password to the box after the loop to generate the password has been completed
    box3 = tk.Entry(width = 50, text='')
    box3.place(x = 50, y = 250)
    box3.insert(0, final)

#Button
button = tk.Button(root, text = "Commit", command = password_generator)
button.place(x = 260, y = 150)


root.mainloop()

简单来说，你初始化的变量需要在for循环之前，所以不是每次都重置，你需要在for循环下面的输入框中添加字符串，这样整个字符串就被添加进去了。

但是，这并不是生成随机字母串的最有效方法。 受此线程的启发，您还可以尝试：

final = ''.join(random.choice(string.ascii_letters + string.punctuation) for i in range(pass_lenght))

请务必添加：

import string

查看有关 string 的更多信息。 您的测试用例不包括密码数量的输入框。 这个答案没有解决需要生成多个密码的问题。