Python：如何创建文件.txt并在其中记录信息

Question

I'm trying to create a file .txt and save the information that the user gives and also open the file in python i'm having trouble in create the file

here is my code

from Tkinter import *

raiz = Tk()
frame = Frame(raiz)

def cadastro():
    form = Toplevel(raiz)

    Label(form, text='Nome: ').grid(column=0, row=0, sticky=E)
    Label(form, text='Celular: ').grid(column=0, row=1, sticky=E)

    nome = StringVar()
    celular = StringVar()

    a=Entry(form, textvariable=nome, width=15)
    a.grid(column=1, row=0, sticky=W)
    Entry(form, textvariable=celular, width=15).grid(column=1, row=1, sticky=W)

    def onCancel():
        form.destroy()

    def onOk():
        ******.insert('','end',text=nome.get(), values=celular.get())
        onCancel()

    Button(form, text='OK', command=onOk).grid(column=0, row=2, sticky=E)
    Button(form, text='Cancel', command=onCancel).grid(column=1, row=2, sticky=W)

def listar():





w = Button(raiz, text='Cadastrar',command=cadastro).grid()
x = Button(raiz, text='Listar').grid()


raiz.mainloop()

the * * it's where i put the file name Thank you very much in advance

Answer 1

You can use the open built-in to get a file object with writing permissions, and then fill the content using the write function :

file = open('<FILENAME>.txt', 'w')
file.write('first line\n')
file.write('second line\n')
file.close()

Check out the linked docs for more info about the open arguments and other useful functions like writelines .

Answer 2

Here's the code, I redesigned it to meet your requirements. Feedback would be much appreciated

from Tkinter import *

raiz = Tk()
frame = Frame(raiz)
out = []

def cadastro():
    form = Toplevel(raiz)

    Label(form, text='Nome: ').grid(column=0, row=0, sticky=E)
    Label(form, text='Celular: ').grid(column=0, row=1, sticky=E)

    nome = StringVar()
    celular = StringVar()

    a=Entry(form, textvariable=nome, width=15)
    a.grid(column=1, row=0, sticky=W)
    Entry(form, textvariable=celular, width=15).grid(column=1, row=1, sticky=W)

    def onCancel():
        form.destroy()

    def onOk():
        with open('outt.txt','w') as txt:
            txt.write('Name : ' + str(nome.get()) + '  ' + 'Telephone No. : ' + str(celular.get()))
        onCancel()

    Button(form, text='OK', command=onOk).grid(column=0, row=2, sticky=E)
    Button(form, text='Cancel', command=onCancel).grid(column=1, row=2, sticky=W)

def listar():
    with open('outt.txt','r') as txt_read:
        print txt_read.read()




w = Button(raiz, text='Cadastrar',command=cadastro).grid()
x = Button(raiz, text='Listar' , command=listar).grid()


raiz.mainloop()

after entering data, if you clicked on listar you can see the output on the screen (though you can manually view the data which is saved in .txt file)

here's a sample:

Name : K-DawG Telephone No. : 911

The key here is using the with as statement, for more info check out Codeacademy's course on python

using a list and the insert() method was surely not the best option for this problem but rather if you use my method and write to a .csv file with delimiters the program could finally be worthwhile

Answer 3

I found a pretty easy way to abstract the concept of files with python's builtin IO functions. I blogged about it here

If you want to write to a file, just do

import sys
sys.stdout = open ("Output.txt", "w")
print "Name :", str(nome.get()), "Telephone No :", str(celular.get())

and if you want to read from a file, just do

import sys
sys.stdin = open ("Input.txt", "r")
print raw_input()