Question

我正在处理我的第一个python脚本。我想在回调函数中使用变量：

def run(self, edit):
    gitFolder = os.path.basename(gitRoot)
    #Get branch
    self.run_command(['git', 'rev-parse','--abbrev-ref','HEAD'], self.branchDone)


def branchDone(self, result):
    build =  "./Build-Release.ps1 " + gitFolder + " " + result +" -Deploy;"
    print build

如何为方法branchDone提供gitFolder？

Answer 1

只需从gitFolder返回run，然后在run中致电branchcode 试试这个： -

def run(self, edit):
    gitFolder = os.path.basename(gitRoot)
    #Get branch
    self.run_command(['git', 'rev-parse','--abbrev-ref','HEAD'], self.branchDone)
    return gitFolder

def branchDone(self, result):
    build =  "./Build-Release.ps1 " + run() + " " + result +" -Deploy;" #run() returns gitfolders
    print build

还有另一种方式

   def run(self, edit):
        self.gitFolder = os.path.basename(gitRoot)
        #Get branch
        self.run_command(['git', 'rev-parse','--abbrev-ref','HEAD'], self.branchDone)


    def branchDone(self, result):
        build =  "./Build-Release.ps1 " + self.gitFolder + " " + result +" -Deploy;"

但它带来了一个问题，您需要在执行run之前执行branchcode函数，否则self.gitfolder将被取消定义并引发Attribute error。

Answer 2

正如我所观察到的，这些是类方法，您可以定义一个类属性来跨它们共享gitFolder。

def run(self, edit):
    self.gitFolder = os.path.basename(gitRoot)
    #Get branch
    self.run_command(['git', 'rev-parse','--abbrev-ref','HEAD'], self.branchDone)


def branchDone(self, result):
    build =  "./Build-Release.ps1 " + self.gitFolder + " " + result +" -Deploy;"
    print build

Answer 3

一种方法是使用functools.partial：

def run(self, edit):
    gitFolder = os.path.basename(gitRoot)
    #Get branch
    callback = functools.partial(self.branchDone, gitFolder)
    self.run_command(['git', 'rev-parse','--abbrev-ref','HEAD'], callback)

def branchDone(self, gitFolder, result):
    build =  "./Build-Release.ps1 " + gitFolder + " " + result +" -Deploy;"
    print build

Answer 4

如果您不需要branchDone作为回调，请考虑将其定义为run内的闭包：

from subprocess import check_output

def run_command(command, callback):
    callback(check_output(command).strip())

class Foo(object):
    def run(self, edit):
        gitFolder = "some_magic"
        def branch_done(result):
            print "./Build-Release.ps1 " + gitFolder + " " + result + " -Deploy;"
        run_command(['git', 'rev-parse','--abbrev-ref','HEAD'], branch_done)

Foo().run("edit")

将参数传递给回调？

4 个答案: