恢复已删除的文件 PyCharm
Recover deleted file PyCharm
我正在使用 PyCharm IDE 中的 python 开发密码管理器。我正在使用数据库来存储密码，这会在项目文件夹中创建一个 .db 文件。然后我想清除该文件，因为我想要一个清晰的数据库来使用。所以我从我的文件夹中删除了 .db 文件，认为它会创建一个新文件并且工作正常。然而，它没有。
我收到以下错误消息：
Traceback (most recent call last):
File "C:/Users/Gebruiker/PycharmProjects/evault/main.py", line 246, in <module>
open_vault()
File "C:/Users/Gebruiker/PycharmProjects/evault/main.py", line 235, in open_vault
Label(vault, text=(array[i][1]), font=("Helvetica", 12)).place(x=400, y=400)
IndexError: list index out of range
我尝试用本地历史恢复更改，但这对我也不起作用（或者我只是不明白）
[编辑] 这是否可能与正在创建的新的、如此空的数据库有关，然后尝试显示该数据库的内容但由于存在 none 而失败？我删除的数据库文件有内容，确实显示了。也可能是完全错误的，idk。
如果有帮助，这是我的整个项目代码：
from tkinter import *
from tkinter import messagebox
from random import choice
import array
import sqlite3
import hashlib
import pyperclip as pc
from functools import partial
# Database
with sqlite3.connect("vault.db") as db:
cursor = db.cursor()
service = None
username = None
password = None
cursor.execute("""
CREATE TABLE IF NOT EXISTS vault (
id INTEGER PRIMARY KEY,
service TEXT NOT NULL,
username TEXT NOT NULL,
password TEXT NOT NULL);
""")
def hash_password(pw):
hash = hashlib.md5(pw)
hash = hash.hexdigest()
return hash
def validate_login():
# getting form data
uname = username_log.get()
pwd = master_key.get()
# applying empty validation
if uname == '' or pwd == '':
message.set("Please fill in all the fields")
else:
if uname == "Laurens" and pwd == "password":
login_screen.destroy()
open_vault()
else:
message.set("Wrong username or password")
def generate_password():
len = 12
digits = '0123456789'
chars = 'abcdefghijklmn' \
'opqrstuvwxyz'
up = chars.upper()
special = '_!$%&?'
all = digits + chars + up + special
password = ''.join(
choice(all) for i in range(len)
)
# print out password
print(password)
save = messagebox.askyesnocancel("Generated password", f"Your generated safe password is: \n \n {password} "
f"\n \n Click yes to copy to clipboard"
f"\n and click no to generate a new password.")
if save:
# 'Yes' > copy to clipboard
pc.copy(password)
elif not save and save is not None:
# 'No' > generate new password
generate_password()
else:
# 'Cancel'
pass
def save_credentials():
service_input = service.get()
username_input = username.get()
password_input = password.get()
insert_fields = ("""INSERT INTO vault(service, username, password)
VALUES(?, ?, ?)
""")
cursor.execute(insert_fields, (service_input, username_input, password_input))
db.commit()
print(db)
open_vault()
def remove_credentials(input):
cursor.execute("DELETE FROM vault WHERE id = ?", (input,))
db.commit()
open_vault()
def register_credentials():
global service
global username
global password
vault.destroy()
register_screen = Tk()
register_screen.resizable(False, False)
register_screen.title("Login")
register_screen.geometry("350x500")
register_screen.configure(bg='#212121')
service = StringVar()
username = StringVar()
password = StringVar()
# Service Label
Label(register_screen, text="Name of service: ", bg='#212121', fg='#ABABAB').place(relx=0.5, y=100, anchor=CENTER)
# Service textbox
Entry(register_screen, textvariable=service).place(width=180, height=30, relx=0.5, y=140, anchor=CENTER)
# Username Label
Label(register_screen, text="Username: ", bg='#212121', fg='#ABABAB').place(relx=0.5, y=200, anchor=CENTER)
# Username textbox
Entry(register_screen, textvariable=username).place(width=180, height=30, relx=0.5, y=240, anchor=CENTER)
# Password Label
Label(register_screen, text="Password: ", bg='#212121', fg='#ABABAB').place(relx=0.5, y=300, anchor=CENTER)
# Password textbox
Entry(register_screen, textvariable=password).place(width=180, height=30, relx=0.5, y=340, anchor=CENTER)
# Generate password button
Button(register_screen, text="Generate safe password", bg='#ABABAB', fg='#000000', command=generate_password).place(
width=140, height=30, relx=0.5, y=400, anchor=CENTER)
# Save credentials button
Button(register_screen, text="Save credentials", bg='#673AB7', fg='#FFFFFF', command=save_credentials).place(
width=150, height=40, relx=0.5, y=460, anchor=CENTER)
register_screen.mainloop()
def login_screen():
global login_screen
global message
global username_log
global master_key
login_screen = Tk()
login_screen.resizable(False, False)
login_screen.title("Login")
login_screen.geometry("300x210")
login_screen.configure(bg='#212121')
# declaring variable
username_log = StringVar()
master_key = StringVar()
message = StringVar()
# Creating layout of login form
Label(login_screen, width="300", text="Please enter username and master key", bg="#673AB7", fg="#FFFFFF").pack()
# Username Label
Label(login_screen, text="Username: ", bg='#212121', fg='#ABABAB').place(x=20, y=40)
# Username textbox
Entry(login_screen, textvariable=username_log).place(x=90, y=42)
# Password Label
Label(login_screen, text="Master key: ", bg='#212121', fg='#ABABAB').place(x=20, y=80)
# Password textbox
Entry(login_screen, textvariable=master_key, show="*").place(x=90, y=82)
# Label for displaying login status[success/failed]
Label(login_screen, text="", textvariable=message, bg='#212121', fg='#ff0000').place(relx=0.5, y=125, anchor=CENTER)
# Login button
Button(login_screen, text="Login", width=10, height=1, bg='#673AB7', fg='#FFFFFF', command=validate_login).place(
x=110, y=150)
login_screen.mainloop()
def open_vault():
global vault
vault = Tk()
vault.resizable(False, False)
vault.title("Evault")
vault.geometry("750x500")
vault.configure(bg='#212121')
Label(vault, text="Service", bg='#212121', fg='#ABABAB').place(relx=0.2, y=75)
Label(vault, text="Username", bg='#212121', fg='#ABABAB').place(relx=0.45, y=75)
Label(vault, text="Password", bg='#212121', fg='#ABABAB').place(relx=0.7, y=75)
Button(vault, text="Register new credentials", bg='#673AB7', fg='#FFFFFF', command=register_credentials).place(
width=150, height=40, relx=0.5, y=450, anchor=CENTER)
cursor.execute('SELECT * FROM vault')
if cursor.fetchall() != None:
i = 0
while True:
cursor.execute('SELECT * FROM vault')
array = cursor.fetchall()
Label(vault, text=(array[i][1]), font=("Helvetica", 12)).place(x=400, y=400)
i += 1
cursor.execute('SELECT * FROM vault')
if len(cursor.fetchall()) <= i:
break
vault.mainloop()
open_vault()
由此抛出错误：
cursor.execute('SELECT * FROM vault')
if cursor.fetchall() != None:
i = 0
while True:
cursor.execute('SELECT * FROM vault')
array = cursor.fetchall()
Label(vault, text=(array[i][1]), font=("Helvetica", 12)).place(x=400, y=400)
i += 1
cursor.execute('SELECT * FROM vault')
if len(cursor.fetchall()) <= i:
break
我承认我不明白这段代码应该做什么。为什么它会重复执行相同的查询？您可能想要这样的东西：
cursor.execute("SELECT * FROM vault")
START_HEIGHT=400
LINE_HEIGHT=50
for i, row in enumerate(cursor.fetchall()):
line_pos = START_HEIGHT + i * LINE_HEIGHT
Label(vault, text=row[1]).place(x=400,y=line_pos)
即直接遍历游标返回的行。
如果仍然出现错误，您需要进行一些调试：打印 cursor.fetchall() 实际上 returns。 （具体来说，打印 list(cursor.fetchall()) 以防它是一个迭代器。）
我正在使用 PyCharm IDE 中的 python 开发密码管理器。我正在使用数据库来存储密码，这会在项目文件夹中创建一个 .db 文件。然后我想清除该文件，因为我想要一个清晰的数据库来使用。所以我从我的文件夹中删除了 .db 文件，认为它会创建一个新文件并且工作正常。然而，它没有。
我收到以下错误消息：
Traceback (most recent call last):
File "C:/Users/Gebruiker/PycharmProjects/evault/main.py", line 246, in <module>
open_vault()
File "C:/Users/Gebruiker/PycharmProjects/evault/main.py", line 235, in open_vault
Label(vault, text=(array[i][1]), font=("Helvetica", 12)).place(x=400, y=400)
IndexError: list index out of range
我尝试用本地历史恢复更改，但这对我也不起作用（或者我只是不明白）
[编辑] 这是否可能与正在创建的新的、如此空的数据库有关，然后尝试显示该数据库的内容但由于存在 none 而失败？我删除的数据库文件有内容，确实显示了。也可能是完全错误的，idk。
如果有帮助，这是我的整个项目代码：
from tkinter import *
from tkinter import messagebox
from random import choice
import array
import sqlite3
import hashlib
import pyperclip as pc
from functools import partial
# Database
with sqlite3.connect("vault.db") as db:
cursor = db.cursor()
service = None
username = None
password = None
cursor.execute("""
CREATE TABLE IF NOT EXISTS vault (
id INTEGER PRIMARY KEY,
service TEXT NOT NULL,
username TEXT NOT NULL,
password TEXT NOT NULL);
""")
def hash_password(pw):
hash = hashlib.md5(pw)
hash = hash.hexdigest()
return hash
def validate_login():
# getting form data
uname = username_log.get()
pwd = master_key.get()
# applying empty validation
if uname == '' or pwd == '':
message.set("Please fill in all the fields")
else:
if uname == "Laurens" and pwd == "password":
login_screen.destroy()
open_vault()
else:
message.set("Wrong username or password")
def generate_password():
len = 12
digits = '0123456789'
chars = 'abcdefghijklmn' \
'opqrstuvwxyz'
up = chars.upper()
special = '_!$%&?'
all = digits + chars + up + special
password = ''.join(
choice(all) for i in range(len)
)
# print out password
print(password)
save = messagebox.askyesnocancel("Generated password", f"Your generated safe password is: \n \n {password} "
f"\n \n Click yes to copy to clipboard"
f"\n and click no to generate a new password.")
if save:
# 'Yes' > copy to clipboard
pc.copy(password)
elif not save and save is not None:
# 'No' > generate new password
generate_password()
else:
# 'Cancel'
pass
def save_credentials():
service_input = service.get()
username_input = username.get()
password_input = password.get()
insert_fields = ("""INSERT INTO vault(service, username, password)
VALUES(?, ?, ?)
""")
cursor.execute(insert_fields, (service_input, username_input, password_input))
db.commit()
print(db)
open_vault()
def remove_credentials(input):
cursor.execute("DELETE FROM vault WHERE id = ?", (input,))
db.commit()
open_vault()
def register_credentials():
global service
global username
global password
vault.destroy()
register_screen = Tk()
register_screen.resizable(False, False)
register_screen.title("Login")
register_screen.geometry("350x500")
register_screen.configure(bg='#212121')
service = StringVar()
username = StringVar()
password = StringVar()
# Service Label
Label(register_screen, text="Name of service: ", bg='#212121', fg='#ABABAB').place(relx=0.5, y=100, anchor=CENTER)
# Service textbox
Entry(register_screen, textvariable=service).place(width=180, height=30, relx=0.5, y=140, anchor=CENTER)
# Username Label
Label(register_screen, text="Username: ", bg='#212121', fg='#ABABAB').place(relx=0.5, y=200, anchor=CENTER)
# Username textbox
Entry(register_screen, textvariable=username).place(width=180, height=30, relx=0.5, y=240, anchor=CENTER)
# Password Label
Label(register_screen, text="Password: ", bg='#212121', fg='#ABABAB').place(relx=0.5, y=300, anchor=CENTER)
# Password textbox
Entry(register_screen, textvariable=password).place(width=180, height=30, relx=0.5, y=340, anchor=CENTER)
# Generate password button
Button(register_screen, text="Generate safe password", bg='#ABABAB', fg='#000000', command=generate_password).place(
width=140, height=30, relx=0.5, y=400, anchor=CENTER)
# Save credentials button
Button(register_screen, text="Save credentials", bg='#673AB7', fg='#FFFFFF', command=save_credentials).place(
width=150, height=40, relx=0.5, y=460, anchor=CENTER)
register_screen.mainloop()
def login_screen():
global login_screen
global message
global username_log
global master_key
login_screen = Tk()
login_screen.resizable(False, False)
login_screen.title("Login")
login_screen.geometry("300x210")
login_screen.configure(bg='#212121')
# declaring variable
username_log = StringVar()
master_key = StringVar()
message = StringVar()
# Creating layout of login form
Label(login_screen, width="300", text="Please enter username and master key", bg="#673AB7", fg="#FFFFFF").pack()
# Username Label
Label(login_screen, text="Username: ", bg='#212121', fg='#ABABAB').place(x=20, y=40)
# Username textbox
Entry(login_screen, textvariable=username_log).place(x=90, y=42)
# Password Label
Label(login_screen, text="Master key: ", bg='#212121', fg='#ABABAB').place(x=20, y=80)
# Password textbox
Entry(login_screen, textvariable=master_key, show="*").place(x=90, y=82)
# Label for displaying login status[success/failed]
Label(login_screen, text="", textvariable=message, bg='#212121', fg='#ff0000').place(relx=0.5, y=125, anchor=CENTER)
# Login button
Button(login_screen, text="Login", width=10, height=1, bg='#673AB7', fg='#FFFFFF', command=validate_login).place(
x=110, y=150)
login_screen.mainloop()
def open_vault():
global vault
vault = Tk()
vault.resizable(False, False)
vault.title("Evault")
vault.geometry("750x500")
vault.configure(bg='#212121')
Label(vault, text="Service", bg='#212121', fg='#ABABAB').place(relx=0.2, y=75)
Label(vault, text="Username", bg='#212121', fg='#ABABAB').place(relx=0.45, y=75)
Label(vault, text="Password", bg='#212121', fg='#ABABAB').place(relx=0.7, y=75)
Button(vault, text="Register new credentials", bg='#673AB7', fg='#FFFFFF', command=register_credentials).place(
width=150, height=40, relx=0.5, y=450, anchor=CENTER)
cursor.execute('SELECT * FROM vault')
if cursor.fetchall() != None:
i = 0
while True:
cursor.execute('SELECT * FROM vault')
array = cursor.fetchall()
Label(vault, text=(array[i][1]), font=("Helvetica", 12)).place(x=400, y=400)
i += 1
cursor.execute('SELECT * FROM vault')
if len(cursor.fetchall()) <= i:
break
vault.mainloop()
open_vault()
由此抛出错误：
cursor.execute('SELECT * FROM vault')
if cursor.fetchall() != None:
i = 0
while True:
cursor.execute('SELECT * FROM vault')
array = cursor.fetchall()
Label(vault, text=(array[i][1]), font=("Helvetica", 12)).place(x=400, y=400)
i += 1
cursor.execute('SELECT * FROM vault')
if len(cursor.fetchall()) <= i:
break
我承认我不明白这段代码应该做什么。为什么它会重复执行相同的查询？您可能想要这样的东西：
cursor.execute("SELECT * FROM vault")
START_HEIGHT=400
LINE_HEIGHT=50
for i, row in enumerate(cursor.fetchall()):
line_pos = START_HEIGHT + i * LINE_HEIGHT
Label(vault, text=row[1]).place(x=400,y=line_pos)
即直接遍历游标返回的行。
如果仍然出现错误，您需要进行一些调试：打印 cursor.fetchall() 实际上 returns。 （具体来说，打印 list(cursor.fetchall()) 以防它是一个迭代器。）