tkinter gui

import paramiko
import datetime
from Tkinter import *
import ttk


today = datetime.date.today().strftime('%Y%m%d')
hosts = {'applog': ['10.0.0.63', '/var/log/testlog.log', 'username', 'password'],
         'serverlog': ['10.0.0.64', '/var/log/error.{}'.format(today)],
         'applog2': ['10.0.0.65', '/home/username/testlog.log']}

needs_pass = ['10.0.0.63']


def credentials():
    def submit_cred():
        if len(hosts[log.get()]) < 3:
            hosts[log.get()].append(username_prompt.get())
            hosts[log.get()].append(password_prompt.get())
        prompt.destroy()
        log_check()

    prompt = Toplevel()
    prompt.title('Username and Password')

    ttkframe = ttk.Frame(prompt, padding='9')
    ttkframe.grid(column=0, row=0, sticky=(N, W, E, S))
    ttkframe.columnconfigure(0, weight=1)
    ttkframe.rowconfigure(0, weight=1)

    ttk.Label(ttkframe, text='Enter your {} username'.format(hosts[log.get()][0])).grid(column=1, row=1, sticky=W)
    user_prompt = ttk.Entry(ttkframe, width=30, textvariable=username_prompt)
    user_prompt.grid(column=1, row=2, sticky=(W, E))

    ttk.Label(ttkframe, text='Enter your password.').grid(column=1, row=3, sticky=W)
    pass_prompt = ttk.Entry(ttkframe, width=30, textvariable=password_prompt, show='*')
    pass_prompt.grid(column=1, row=4, sticky=(W, E))

    ttk.Button(ttkframe, text='Submit', command=submit_cred).grid(column=1, row=5, sticky=W)

    for child in ttkframe.winfo_children(): child.grid_configure(padx=5, pady=2)


def log_check(*args):
    # Clear out any text in the box.
    output.delete("1.0", END)

    # Get the info
    host = hosts[log.get()][0]
    log_loc = hosts[log.get()][1]
    user = hosts[log.get()][2]
    passwd = hosts[log.get()][3]

    # Create the object.
    ssh = paramiko.SSHClient()
    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

    # Verify connectivity/authenticate.
    try:
        ssh.connect(host, username=user, password=passwd)
    except Exception as e:
        error = str(e)
        if error.find('connection attempt failed') != -1:
            output.insert(INSERT, 'Connection Failed')
        elif 'Authentication failed' in error:
            output.insert(INSERT, error)

    # Pass the command and get results.
    stdin, stdout, stderr = ssh.exec_command("grep -i '{0}' {1} | tail -n {2}".format(query.get(), log_loc, tail.get()))
    output.insert(INSERT, stdout.read())


# Add select all support.
def select_all(event):
    output.tag_add(SEL, "1.0", END)
    output.mark_set(INSERT, "1.0")
    output.see(INSERT)
    return 'break'


# Parent Window Setup
root = Tk()
root.title('Log Check')
root.bind("<Control-Key-a>", select_all)
root.bind("<Control-Key-A>", select_all)

mainframe = ttk.Frame(root, padding='3') #L T R B or LR TB
mainframe.grid(column=0, row=0, sticky=(N, W, E, S))
mainframe.columnconfigure(0, weight=1)
mainframe.rowconfigure(0, weight=1)

# GUI Variables
username_prompt = StringVar()
password_prompt = StringVar()
query = StringVar()
tail = StringVar()
log_chosen = StringVar()


# Entry Options
log = ttk.Combobox(mainframe, state='readonly',  textvariable=log_chosen)
log['values'] = ('TimTest', 'DIRECTV', 'AMEX')
log.current(0)
log.grid(column=1, row=2, sticky=W)

search_box = ttk.Entry(mainframe, width=25, textvariable=query)
search_box.grid(column=2, row=2, stick=W)

tail_box = ttk.Entry(mainframe, width=5, textvariable=tail)
tail_box.grid(column=3, row=2, sticky=W)

submit = ttk.Button(mainframe, text='Submit',
                    command=lambda: credentials() if hosts[log.get()][0] in needs_pass else log_check())
submit.grid(column=4, row=2, stick=W)


# Text Output
output = Text(mainframe, relief=SUNKEN)
output.grid(column=1, row=3, columnspan=4)

# Labels
ttk.Label(mainframe, text='Choose Log').grid(column=1, row=1, sticky=W)
ttk.Label(mainframe, text='Search For:').grid(column=2, row=1, sticky=W)
ttk.Label(mainframe, text='How many lines?').grid(column=3, row=1, sticky=W)

# Mainloop
for child in mainframe.winfo_children(): child.grid_configure(padx=3, pady=3)
root.mainloop()