Question

我试图传递一个变量列表, 名为检查功能安装 Func 的支票, 出于某种原因, 它似乎不起作用, 以下是我(认为)相关的代码:

def installFunc(checks):
    subprocess.call("md c:MGInstall", shell=True)
    subprocess.call (u"net use w: \it01files")
    if checks[0] == 1:
        subprocess.call(u"w:\software\snagitup.exe")
    if checks[1] == 1:
        subprocess.call(u"w:\software\camtasia.exe")
    if checks[2] == 1:
        urllib.urlretrieve(u"LONGURL", u"c:\MGinstall\gotomeeting.exe")
        subprocess.call (u"c:\MGinstall\gotomeeting.exe")
    if checks[3] == 1:
        sixtyfourcheck()
        if is64bit == True:
            urllib.urlretrieve(u"LONGURL", u"c:\MGinstall\tortoiseSVN.exe")
        elif is64bit == False:
            urllib.urlretrieve(u"LONGURL", u"c:\MGinstall\tortoiseSVN.exe")
    #urllib.urlretrieve(u"LONGURL", u"c:\MGinstall\MGinstall.exe")
    #subprocess.call (u"c:\MGinstall\MGinstall.exe")
    #subprocess.call (u"w:\printers\installer\printer.exe")

app = Tk()

w = Label(app, text="IT Automatic Installer")
w.pack()

text = ["Snagit", "Camtasia", "GotoMeeting", "TortoiseSVN"]
variables = []
for name in text:
    variables.append(IntVar())
    Checkbutton(text=name, variable=variables[-1]).pack()

checks = [variable.get() for variable in variables]
b = Button(text="Install", command= lambda : installFunc(checks))
b.pack()

app.mainloop()

现在,我尝试了几个不同的东西-- 我实际上被堆积堆溢出所给的羊羔部分-- 我有点不明白它是如何运作的。

但我最大的问题是为什么没有通过支票来安装 Func ()? 我想把完整的支票清单( 像我输入的一样多) 传递给安装 Func () 。

Answer 1

variable.get () 返回在应用程序启动前的该程序被称作时 < intVar 实例的值。所以, 它会满是零。

def installCommand(variables):
    checks = [variable.get() for variable in variables]
    return installFunc(checks)

b = Button(text="Install", command= lambda v=variables: installCommand(v))
b.pack()

另外,您需要将 可变 作为设置参数传递给 ambda, 这样您就不会与全球和本地变量发生冲突。

Answer 2

根据我先前的评论,一个重构的版本:

import urllib
import subprocess
import os
import Tkinter as tk

class ProgramInstaller(object):
    def __init__(self, name, descr, do_install):
        self.name    = name
        self.descr   = descr
        self.do_install = do_install    # can be function or list of strings

    def install(self):
        if callable(self.do_install):
            self.do_install()
        else:
            for s in self.do_install:
                subprocess.call(s)

TEMP_DIR = r"c:MGInstall"

def makeTempDir(dir=TEMP_DIR):
    # need to expand on this - what if dir already exists, etc
    os.mkdir(dir)

def removeTempDir(dir=TEMP_DIR):
    # need to expand on this - del files in dir before rmdir, etc
    os.rmdir(dir)

def installGoToMeeting():
    makeTempDir()
    url = "http://www.gotomeeting.com/download/something"
    fname = os.path.join(TEMP_DIR, "gotomeeting.exe")
    urllib.urlretrieve(url, fname)
    subprocess.call(fname)
    removeTempDir()

def installTortoiseSVN():
    makeTempDir()
    if is64bit(): url = "http://www.tortoisesvn.net/download/something/64bit"
    else:         url = "http://www.tortoisesvn.net/download/something/32bit"
    fname = os.join(TEMP_DIR, "tortoisesvn.exe")
    urllib.urlretrieve(url, fname)
    subprocess.call(fname)
    removeTempDir()

installers = (
    ProgramInstaller("SnagIt",      "Take screen-shots",           [r"net use w: \it01files", r"w:softwaresnagitup.exe"]),
    ProgramInstaller("Camtasia",    "Record your desktop",         [r"net use w: \it01files", r"w:softwarecamtasia.exe"]),
    ProgramInstaller("GoToMeeting", "Web conferencing",            installGoToMeeting),
    ProgramInstaller("TortoiseSVN", "(Sub)Version control client", installTortoiseSVN),
    ProgramInstaller("Printer",     "HP4020 Printer drivers",      [r"net use w: \it01files", r"w:printersinstallerprinter.exe"])
)

def doInstall():        # install-button callback
    for inst in installers:
        if inst.cbvar.get():
            inst.install()

def main():
    app = tk.Tk()
    tk.Label(app, text="IT Automatic Installer").pack()

    # need to fiddle with a grid layout to make this look right
    for inst in installers:
        inst.cbvar = tk.IntVar()
        tk.Checkbutton(text=inst.name, variable=inst.cbvar).pack()
        tk.Label(text=inst.descr).pack()

    tk.Button(text="Install", command=doInstall()).pack()
    app.mainloop()

if __name__=="__main__":
    main()

Answer 3

您至少可以用几种方式做到这一点。个人而言, 我将把安装器抽象成一个对象, 正如Hugh Bothwells 评论中所提到的那样。这具有最大的灵活性和简洁的状态封套。但是, 如果您重新设置仅使用一个函数, 您可以使用滑轮来“ 调转” 函数 : 动态地创建一个包含给定参数的新函数。这里您需要做的修改是...

def installFunc(checks):
    subprocess.call("md c:MGInstall", shell=True)
    subprocess.call (u"net use w: \it01files")
    if checks[0].get( ) == 1:
        subprocess.call(u"w:\software\snagitup.exe")
    if checks[1].get( ) == 1:
        subprocess.call(u"w:\software\camtasia.exe")
    if checks[2].get( ) == 1:
        urllib.urlretrieve(u"LONGURL", u"c:\MGinstall\gotomeeting.exe")
        subprocess.call (u"c:\MGinstall\gotomeeting.exe")
    if checks[3].get( ) == 1:
        sixtyfourcheck()
        if is64bit == True:
            urllib.urlretrieve(u"LONGURL", u"c:\MGinstall\tortoiseSVN.exe")
        elif is64bit == False:
            urllib.urlretrieve(u"LONGURL", u"c:\MGinstall\tortoiseSVN.exe")


import functools

app = Tk()

w = Label(app, text="IT Automatic Installer")
w.pack()

text = ["Snagit", "Camtasia", "GotoMeeting", "TortoiseSVN"]
variables = []
for name in text:
    variables.append(IntVar())
    Checkbutton(text=name, variable=variables[-1]).pack()

checks = [variable.get() for variable in variables]

#-- Here s where we "curry" the installFunc, producing the new doInstall function.
doInstall = functools.partial(installFunc, checks)

b = Button(text="Install", command = doInstall)
b.pack()

app.mainloop()

这里的问题是变量. get () 创建了一个不可变的元素, 您的列表“ checks” 永远不会改变。您可能真正想要的是...

import functools

app = Tk()

w = Label(app, text="IT Automatic Installer")
w.pack()

text = ["Snagit", "Camtasia", "GotoMeeting", "TortoiseSVN"]
variables = []
for name in text:
    variables.append(IntVar())
    Checkbutton(text=name, variable=variables[-1]).pack()

checks = [variable for variable in variables]

#-- Here s where we "curry" the installFunc, producing the new doInstall function.
doInstall = functools.partial(installFunc, checks)

b = Button(text="Install", command = doInstall)
b.pack()

app.mainloop()

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