Clear all widgets in a layout in pyqt

Is there a way to clear (delete) all the widgets in a layout? self.plot_layout = QtGui.QGridLayout() self.plot_layout.setGeometry(QtCore.QRect(200,200,200,200)) self.root_layout.addLayout(self.plot_layout) self.plot_layout.addWidget(MyWidget()) Now I want to replace the widget in plot_layout with a new widget. Is there an easy way to clear all the widgets in plot_layout ? I don't see any

在pyqt中清除布局中的所有小部件

有没有办法清除(删除)布局中的所有小部件? self.plot_layout = QtGui.QGridLayout() self.plot_layout.setGeometry(QtCore.QRect(200,200,200,200)) self.root_layout.addLayout(self.plot_layout) self.plot_layout.addWidget(MyWidget()) 现在我想用一个新的小部件替换plot_layout中的小部件。 有没有简单的方法来清除plot_layout所有小部件? 我没有看到任何方法。 经过大量研究(并且这个花了相当多的时间,所以我

PyQt, widget do not shown

I've this hort program in Python ad Qt4 #!/usr/bin/python # -*- coding: utf-8 -*- import sys from PyQt4 import QtGui from PyQt4 import QtCore color = QtGui.QColor(99, 0, 0) class colorButton(QtGui.QWidget): def __init__(self, args): QtGui.QWidget.__init__(self,args) self.setGeometry(150, 22, 50, 50) self.setStyleSheet("QWidget { background-color: %s }" % color

PyQt,小部件没有显示

我在Python Qt4中使用了这个hort程序 #!/usr/bin/python # -*- coding: utf-8 -*- import sys from PyQt4 import QtGui from PyQt4 import QtCore color = QtGui.QColor(99, 0, 0) class colorButton(QtGui.QWidget): def __init__(self, args): QtGui.QWidget.__init__(self,args) self.setGeometry(150, 22, 50, 50) self.setStyleSheet("QWidget { background-color: %s }" % color.name())

Are unittest base classes good practice? (python/webapp2)

I'm rather new to unit-testing and am trying to feel out the best practices for the thing. I've seen several questions on here relating to unit-test inheriting a base class that itself contains several tests, for example: class TestBase(unittest.TestCase): # some standard tests class AnotherTest(TestBase): # run some more tests in addition to the standard tests I think what I&

单元测试基础班是否良好的做法? (蟒/ webapp2的)

我对单元测试相当陌生,并且试图感受这个东西的最佳实践。 我在这里看到了几个有关单元测试的问题,这些单元测试继承了一个本身包含多个测试的基类,例如: class TestBase(unittest.TestCase): # some standard tests class AnotherTest(TestBase): # run some more tests in addition to the standard tests 我认为从社区收集的是,为每个实现编写单独的测试并使用多重继承是一个更好的主意。 但是如果该基类实际

Google Protobuf empty fields and messages criteria (Python)

Suppose I have the following protobuf file definitions: syntax = "proto2"; message request { optional string a = 1; optional bytes b = 2; } message dummy { optional string u = 1; optional request v = 2; } The following are my doubts/requirements: Check if any of the fields is set or not in "request" object? Check if the field "u" is set in "dummy" objec

Google Protobuf空字段和消息标准(Python)

假设我有以下protobuf文件定义: syntax = "proto2"; message request { optional string a = 1; optional bytes b = 2; } message dummy { optional string u = 1; optional request v = 2; } 以下是我的疑惑/要求: 检查是否有任何字段已设置或不在“请求”对象中? 检查字段“u”是否设置在“虚拟”对象中? 检查“虚拟”对象中的字段“v”是否已设置(表示任何内部字段设置为某个值)? 如何处理涉及具有默认值的字

Python: print protobuf spec (fields, types)

If you have a module object corresponding to a module_name_pb2.py file, or access to the .proto file itself, is there a way to print the spec itself in a pretty way? JSON? I want to show the fields and the types. I am not looking to print an instance eg, Print human friendly Protobuf message Given some protobuf message format (Defined in a .proto file) like: message XYData { float x =

Python:打印protobuf规范(字段,类型)

如果你有一个与module_name_pb2.py文件相对应的模块对象,或者访问.proto文件本身,有没有一种方法可以以一种非常好的方式打印规范本身? JSON? 我想显示字段和类型。 我不打算打印一个实例,例如,打印人性化的Protobuf消息 给定一些protobuf消息格式(定义在.proto文件中),如: message XYData { float x = 1; float y = 2; } 我正在寻找像这样的东西: { "name" : "XYData", "fields" : [

Protobuf, Python: assign to a field

I am trying to modify values in a protobuf binary file with Python. I iterate over the fields in the message and set them to new values, however, when I check the values in the message object, I see that the values are still the same, which leads me to the conclusion that the fields are copied during the iteration. Is there a way to modify fields in a protobuf message without creating a new ob

Protobuf,Python:分配给一个字段

我试图用Python修改protobuf二进制文件中的值。 我遍历消息中的字段,并将它们设置为新值,但是,当我检查消息对象中的值时,我发现值仍然相同,这导致我得出结论,字段在迭代。 有没有办法修改protobuf消息中的字段而不创建新对象并将其从修改后的值中进行组装? UPD :我正在处理一个已解析的二进制文件,也就是我导入生成的python文件(从.proto文件生成), ParseFromString它,然后我使用反序列化表示。

How to access unknown fields

I am working with a large number of message types with similar but not identical structure. All the stuff that's common among these is in another message. When a message comes in, I parse it using the common message type. However, I can't seem to find a way to access the fields outside of this type (ie the non-common fields). Is there a way to access the unknown field set in python?

如何访问未知字段

我正在处理大量类似但结构不相同的消息类型。 所有这些常见的东西都在另一个消息中。 当消息进入时,我使用常用​​消息类型对其进行解析。 但是,我似乎无法找到访问此类型以外的字段(即非公共字段)的方法。 有没有办法访问Python中设置的未知字段? 编辑:我刚刚在文档中看到了这一点: “如果消息有未知字段,那么当前的Java和C ++实现在按顺序排列的已知字段之后以任意顺序写它们。当前的Python实现不会跟踪未知字段

How do I remove a substring from the end of a string in Python?

I have the following code: url = 'abcdc.com' print(url.strip('.com')) I expected: abcdc I got: abcd Now I do url.rsplit('.com', 1) Is there a better way? You could do this: url = 'abcdc.com' if url.endswith('.com'): url = url[:-4] Or using regular expressions: import re url = 'abcdc.com' url = re.sub('.com$', '', url) 如果你确定字符串只出现在最后,那么最简单的方法就是使用'替

如何从Python中的字符串末尾删除子字符串?

我有以下代码: url = 'abcdc.com' print(url.strip('.com')) 我期望: abcdc 我得到了: abcd 现在我知道了 url.rsplit('.com', 1) 有没有更好的办法? 你可以这样做: url = 'abcdc.com' if url.endswith('.com'): url = url[:-4] 或者使用正则表达式: import re url = 'abcdc.com' url = re.sub('.com$', '', url) 如果你确定字符串只出现在最后,那么最简单的方法就是使用'替换': url = 'abcdc.co

print all loops once/together in python

This question already has an answer here: How to print without newline or space? 26 answers for i in range(10): total = 0 total = total + i print(total,end=" ") print功能的能力,每一行的结束从n改变为" "

在python中一次/一次打印所有循环

这个问题在这里已经有了答案: 如何在没有换行符或空格的情况下打印? 26个答案 for i in range(10): total = 0 total = total + i print(total,end=" ") print功能的能力,每一行的结束从n改变为" "

How to stop an extra trailing newline character?

This question already has an answer here: How to print without newline or space? 26 answers basically the newline is a result of your print printing an empty line . Take this code for example: >>> a = input() # user presses enter (blank line) >>> a '' >>> print(a) # a newline introduced by `print` function >>> we can however overri

如何停止一个额外的尾随换行符?

这个问题在这里已经有了答案: 如何在没有换行符或空格的情况下打印? 26个答案 基本上newline是由于您的print打印空line 。 以此代码为例: >>> a = input() # user presses enter (blank line) >>> a '' >>> print(a) # a newline introduced by `print` function >>> 我们可以重写这个默认的打印行为 打印为表单打印([object,...] [,sep =''