生成函数，以便使用exec在pyqt中放置小部件不识别self
生成函数，以便使用exec在pyqt中放置小部件不识别self
提问于 2016-03-15 08:32:03
refers this question, to-convert-string-to-variable-name-in-python
我希望收集用户输入，但是由于“方法”的更改，输入字段不同，因此我希望生成基于以下内容的内容：
search_method = { 'id' : ['id'],
'detail' : ['catagory', 'price', 'enroll date'],
'drawer' : ['name', 'sex', 'state']
'internal' : ['transaction date', 'msg id']
}用作动态输入字段
预期的结果是键作为单选按钮生成，并将生成“标签”、“行编辑”对到特定的无线电选择。
下面是pyqt内部的exec测试(clearLayout借用了user3369214 )
步骤：
- 创建小部件
- 创建将它们添加到布局中的函数
- 将信号连接到更改布局的功能
与一个接一个地添加它们相比，它的优点是扩展灵活，并且便于返回数据收集(最重要的是，短)，但是程序碰巧说。
NameError: global name 'self' is not defined
or SyntaxError: can't assign to function call可能有一些范围或内部问题，希望有人能帮忙，或一些高级功能的东西可能有帮助？
from PyQt4 import QtCore, QtGui
import sys
class TestDialog(QtGui.QDialog):
def __init__(self, parent = None):
super(TestDialog, self).__init__()
self.initUI()
def clearLayout(self, layout)
if layout != None:
while layout.count():
child = layout.takeAt(0)
if child.widget() is not None:
child.widget().deleteLater()
elif child.layout() is not None:
self.clearLayout(child.layout())
layout.setParent(None)
def initUI(self):
search_method = { 'id' : ['id'],
'detail' : ['catagory', 'price', 'enroll date'],
'drawer' : ['name', 'sex', 'state']
'internal' : ['transaction date', 'msg id']
}
self.layTop = QtGui.QHBoxLayout()
self.lblBy = QtGui.QLabel("By")
self.layTop.addWidget(self.lblBy)
for option in search_method.keys():
exec('self.rad_' + option + ' = QtGui.QRadioButton("' + option + '")')
exec('self.layTop.addWidget(self.rad_' + option + ')')
self.vlay = QtGui.QHBoxLayout()
self.vlay.addLayout(self.layTop)
self.layInput = QtGui.QVBoxLayout()
for option in search_method.keys():
code = 'def by_' + option + '():'
code += 'self.clearLayout(self.layInput)'
for input_field in search_method[option]:
code += 'self.lay_' + input_field + ' = QtGui.QHBoxLayout()'
code += ';self.lbl_' + input_field + ' = QtGui.QLabel("' + input_field + '")'
code += ';self.edit_' + input_field + ' = QtGui.QLineEdit()'
code += ';self.lay_' + input_field + '.addWidget(self.lbl_' + input_field + ')'
code += ';self.lay_' + input_field + '.addWidget(self.edit_' + input_field + ')'
code += ';self.layInput.addLayout(self.lay_' + input_field + ')'
exec code
for option in options.keys():
exec('self.rad_' + option + '.toggled.connect(by_' + option + ')')
self.setLayout(self.vlay)
app = QtGui.QApplication(sys.argv)
testDialog = TestDialog()
testDialog.show()
sys.exit(testDialog.exec_())我也在普通课上做过测试，但效果很好(可以识别“自我”)
class A:
def __init__(self, parm1, parm2):
self.parm1 = parm1
self.parm2 = parm2
def display(self):
to_exec = ''
to_exec += 'def jack():'
to_exec += 'print "hey hey hey"'
exec(to_exec)
exec('print self.parm' + '1')
exec('print self.parm' + '2')
exec('jack()')
def aha(self):
exec(self.display()')
a = A('hello', 'world')
exec 'a.aha()'回答 1
Stack Overflow用户
回答已采纳
发布于 2016-03-15 09:36:58
exec是不必要的。这样代码就更难读了。使用字典来保存小部件怎么样？
import sys
from PyQt4 import QtGui
class TestDialog(QtGui.QDialog):
def __init__(self, parent=None):
super(TestDialog, self).__init__(parent)
self.initUI()
def clearLayout(self, layout):
if layout is None:
return
while layout.count():
child = layout.takeAt(0)
if child.widget() is not None:
child.widget().deleteLater()
elif child.layout() is not None:
self.clearLayout(child.layout())
layout.setParent(None)
def initUI(self):
search_method = {
'id': ['id'],
'detail': ['catagory', 'price', 'enroll_date'],
'drawer': ['name', 'sex', 'state'],
'internal': ['transaction_date', 'msg_id'],
}
self.layTop = QtGui.QHBoxLayout()
self.lblBy = QtGui.QLabel("By")
self.layTop.addWidget(self.lblBy)
self.radios = {}
self.layouts = {}
self.labels = {}
self.edits = {}
for option in search_method:
r = self.radios[option] = QtGui.QRadioButton(option)
self.layTop.addWidget(r)
self.vlay = QtGui.QHBoxLayout()
self.vlay.addLayout(self.layTop)
self.layInput = QtGui.QVBoxLayout()
def by_option(option):
self.clearLayout(self.layInput)
for input_field in search_method[option]:
lbl = self.labels[input_field] = QtGui.QLabel(input_field)
edit = self.edits[input_field] = QtGui.QLineEdit()
layout = self.layouts[input_field] = QtGui.QHBoxLayout()
layout.addWidget(lbl)
layout.addWidget(edit)
self.layInput.addLayout(layout)
self.vlay.addLayout(self.layInput)
for option in search_method:
self.radios[option].toggled.connect(
lambda yesno, option=option: by_option(option)
)
self.setLayout(self.vlay)
app = QtGui.QApplication(sys.argv)
testDialog = TestDialog()
testDialog.show()
sys.exit(testDialog.exec_())页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/36006049
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