我在设置应用程序时遇到了麻烦。我需要帮助来开发数据库中的update命令。我已经尝试了几种方法，但是由于我使用TextBox小部件的简单原因，该过程要复杂得多。如您所见，我完成了插入和删除值的所有艰苦工作，但是我只需要知道如何更新它们即可。
from tkinter import ttk
from tkinter import *
import tkinter
import sqlite3
class cadastro:
# connection dir property----------------------------------------------------
# propriedade do dir de conexão------------------------------------------------
db_name = 'database.db'
def __init__(self, window):
# Initializations ----------------------------------------------
#Inicializações --------------------------------------------------
self.wind = window
self.wind.title('cadastro DataSet')
# Creating a Frame Container ------------------------------------------------
#Criando um Contêiner de Quadro-------------------------------------------
frame = LabelFrame(self.wind, text = 'Registrar novo cadastro')
frame.grid(row = 0, column = 0, columnspan = 3, pady = 20)
# Name Input------------------------------------------------------
Label(frame, text = 'Name: ').grid(row = 1, column = 0)
self.name = Text(frame, width=20,height=3)
self.name.config(font=("consolas", 12), undo=True, wrap='word')
self.name.focus()
self.name.grid(row = 1, column = 1)
self.scrollb = Scrollbar(frame, command=self.name.yview)
self.scrollb.grid(row=1, column=1, sticky='ns', columnspan=3)
self.name['yscrollcommand'] = self.scrollb.set
Label(frame, text = 'Description: ').grid(row = 2, column = 0)
self.description = Text(frame, width=20,height=3)
self.description.config(font=("consolas", 12), undo=True, wrap='word')
self.description.focus()
self.description.grid(row = 2, column = 1)
self.scrollb = Scrollbar(frame, command=self.description.yview)
self.scrollb.grid(row=2, column=1, sticky='ns', columnspan=3)
self.description['yscrollcommand'] = self.scrollb.set
Label(frame, text = 'Local: ').grid(row = 3, column = 0)
self.local = Text(frame,width=20,height=3)
self.local.config(font=("consolas", 12), undo=True, wrap='word')
self.local.focus()
self.local.grid(row = 3, column = 1)
self.scrollb = Scrollbar(frame, command=self.local.yview)
self.scrollb.grid(row=3, column=1, sticky='ns', columnspan=3)
self.local['yscrollcommand'] = self.scrollb.set
self.tree = ttk.Treeview(frame,columns=("Name", "Description"))
self.tree.heading("#0", text="Name", anchor= CENTER)
self.tree.heading("#1", text="Description", anchor= CENTER)
self.tree.heading("#2", text="Local", anchor= CENTER)
self.tree.grid(row = 4, column = 0, columnspan = 5, ipady=10)
self.scrollb = Scrollbar(frame, command=self.tree.yview)
self.scrollb.grid(row=4, column=5, sticky='ns', rowspan=1)
self.tree['yscrollcommand'] = self.scrollb.set
# Button Add cadastro --------------------------------------------------
ttk.Button(frame, text = 'Inserir', command = self.add_cadastro).grid(row = 5, column = 1, sticky = W + E)
#Botão para excluir cadastro--------------------------------------------
ttk.Button(frame, text = 'DELETE', command = self.delete_cadastro).grid(row = 5, column = 2, sticky = W + E)
#Botão para atualizar cadastro------------------------------------------
ttk.Button(frame, text = 'EDIT', command = self.edit_cadastro).grid(row = 5, column = 3, sticky = W + E)
# Output Messages ------------------------------------------------------
# Mensagens de Saída ---------------------------------------------------
self.message = Label(text = '', fg = 'red')
self.message.grid(row = 7, column = 0, columnspan = 3, sticky = W + E)
# Filling the Rows-------------------------------------------------------
# Preenchendo as filas----------------------------------------------------
self.get_cadastro()
# Function to Execute Database Querys----------------------------------------------
# Função para executar bancos de dados --------------------------------------------
def run_query(self, query, parameters = ()):
with sqlite3.connect(self.db_name) as conn:
cursor = conn.cursor()
cursor.execute("CREATE TABLE IF NOT EXISTS cadastro (id INTEGER PRIMARY KEY , name TEXT, description TEXT, local TEXT)")
result = cursor.execute(query, parameters)
conn.commit()
return result
def get_cadastro(self):
# cleaning Table ----------------------------------------------------------------
# mesa de limpeza------------------------------------------------------------------
records = self.tree.get_children()
for element in records:
self.tree.delete(element)
query = 'SELECT * FROM cadastro ORDER BY name DESC'
db_rows = self.run_query(query)
for row in db_rows:
self.tree.insert('', 0, text = row[1], values = (row[2],row[3]))
# Validação De Entrada De Usuário -----------------------------------------------------
def validation(self):
return (self.name.get(1.0, END)),(self.description.get(1.0, END), (self.local.get(1.0, END)))
def add_cadastro(self):
if self.validation():
query = 'INSERT INTO cadastro VALUES(NULL, ?, ?, ?)'
parameters = (self.name.get(1.0, END), self.description.get(1.0, END), self.local.get(1.0, END))
self.run_query(query, parameters)
self.message['text'] = 'cadastro {} added Successfully'.format(self.name.get(1.0, END))
self.name.delete(1.0, END)
self.description.delete(1.0, END)
self.local.delete(1.0, END)
else:
self.message['text'] = 'Name and Data is Required'
self.get_cadastro()
def delete_cadastro(self):
self.message['text'] = ''
try:
self.tree.item(self.tree.selection())['text'][0]
except IndexError as e:
self.message['text'] = 'Please select a Record'
return
self.message['text'] = ''
name = self.tree.item(self.tree.selection())['text']
query = 'DELETE FROM cadastro WHERE name = ?'
self.run_query(query, (name, ))
self.message['text'] = 'Record {} deleted Successfully'.format(name)
self.get_cadastro()
def edit_cadastro(self):
self.message['text'] = ''
try:
self.tree.item(self.tree.selection())['values'][0]
except IndexError as e:
self.message['text'] = 'Please, select Record'
return
name = self.tree.item(self.tree.selection())['text']
description = self.tree.item(self.tree.selection())['values'][0]
local = self.tree.item(self.tree.selection())['values'][1]
self.edit_wind = Toplevel()
self.edit_wind.title = 'Edit Civilization'
frame2 = LabelFrame(self.edit_wind, text = 'Registros atuais,janela de visualização avançada.')
frame2.grid(row = 0, column = 0, columnspan = 3, pady = 20)
self.nomelab = Label(frame2, text = 'Name: ').grid(row = 1, column = 0)
message2 = Text(frame2, height=5, width=50)
message2.config(font=("consolas", 12), undo=True, wrap='word')
message2.insert(END, name)
message2.grid(row = 2, column = 0, columnspan = 2, sticky = W + E)
self.descriptlab = Label(frame2, text = 'Description: ').grid(row = 3, column = 0)
message3 = Text(frame2, height=5, width=34)
message3.config(font=("consolas", 12), undo=True, wrap='word')
message3.insert(END, description)
message3.grid(row = 4, column = 0, columnspan = 2, sticky = W + E)
self.locallab = Label(frame2, text = 'Local: ').grid(row = 5, column = 0)
message4 = Text(frame2, height=5, width=34)
message4.config(font=("consolas", 12), undo=True, wrap='word')
message4.insert(END, local)
message4.grid(row = 6, column = 0, columnspan = 2, sticky = W + E)
if __name__ == '__main__':
window = Tk()
application = cadastro(window)
window.mainloop()
答案 0 :(得分：0)
添加如下功能：
import pandas as pd
import matplotlib.pyplot as plt
plt.figure(0)
for i in range(5):
k=2014+i
crimesyear=crimes.loc[crimes['Year'].isin([k])]
crimesyear.groupby('Month')['INCIDENT_ID'].c**strong text**ount().plot(marker='o')
plt.figure(i+1)
plt.xticks(numpy.arange(12),months)
plt.ylabel('Number of Crimes')
plt.show
print(k)
并在def update_castro(self, old_name, message2, message3, message4):
message2 = message2.get(1.0, END)
message3 = message3.get(1.0, END)
message4 = message4.get(1.0, END)
query = 'UPDATE cadastro set name = ?, description = ?, local = ? WHERE name = ?'
self.run_query(query, (message2, message3, message4, old_name ))
self.get_cadastro()
self.edit_wind.destroy()
中添加一个名为更新的按钮：
edit_wind或直接使用下面的代码：）
ttk.Button(
frame2, text = 'Update',
command = lambda: self.update_castro(name, message2, message3, message4)
).grid(row = 7, column = 3, sticky = W + E)