Question

我有一个简单的PyQt GUI，它提供了我希望变成日期时间格式的值。

目前正在打印

我想要打印

2010,1,1

这是PyQt代码，

*timer.py
from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class Ui_Dialog(object):
    def setupUi(self, Dialog):

        Dialog.setObjectName(_fromUtf8("Dialog"))
        Dialog.resize(510, 129)
        self.gridLayout = QtGui.QGridLayout(Dialog)
        self.gridLayout.setObjectName(_fromUtf8("gridLayout"))
        self.frame = QtGui.QFrame(Dialog)
        self.frame.setFrameShape(QtGui.QFrame.StyledPanel)
        self.frame.setFrameShadow(QtGui.QFrame.Raised)
        self.frame.setObjectName(_fromUtf8("frame"))
        self.gridLayout_2 = QtGui.QGridLayout(self.frame)
        self.gridLayout_2.setObjectName(_fromUtf8("gridLayout_2"))
        self.yearlabel = QtGui.QLabel(self.frame)
        self.yearlabel.setObjectName(_fromUtf8("yearlabel"))
        self.gridLayout_2.addWidget(self.yearlabel, 0, 0, 1, 1)
        self.monthfromcomboBox = QtGui.QComboBox(self.frame)
        self.monthfromcomboBox.setObjectName(_fromUtf8("monthfromcomboBox"))
        self.gridLayout_2.addWidget(self.monthfromcomboBox, 1, 2, 1, 2)
        self.label_2 = QtGui.QLabel(self.frame)
        self.label_2.setObjectName(_fromUtf8("label_2"))
        self.gridLayout_2.addWidget(self.label_2, 0, 4, 1, 1)
        self.SearchButton = QtGui.QPushButton(self.frame)
        self.SearchButton.setObjectName(_fromUtf8("SearchButton"))
        self.gridLayout_2.addWidget(self.SearchButton, 2, 4, 1, 2)
        self.yearfromcomboBox = QtGui.QComboBox(self.frame)
        self.yearfromcomboBox.setObjectName(_fromUtf8("yearfromcomboBox"))
        self.gridLayout_2.addWidget(self.yearfromcomboBox, 1, 0, 1, 2)
        self.dayfromcomboBox = QtGui.QComboBox(self.frame)
        self.dayfromcomboBox.setObjectName(_fromUtf8("dayfromcomboBox"))
        self.gridLayout_2.addWidget(self.dayfromcomboBox, 1, 4, 1, 2)
        self.label = QtGui.QLabel(self.frame)
        self.label.setObjectName(_fromUtf8("label"))
        self.gridLayout_2.addWidget(self.label, 0, 2, 1, 1)
        self.gridLayout.addWidget(self.frame, 0, 0, 1, 1)

        self.retranslateUi(Dialog)
        QtCore.QMetaObject.connectSlotsByName(Dialog)
        Dialog.setTabOrder(self.yearfromcomboBox, self.monthfromcomboBox)
        Dialog.setTabOrder(self.monthfromcomboBox, self.dayfromcomboBox)

    def retranslateUi(self, Dialog):
        Dialog.setWindowTitle(_translate("Dialog", "Dialog", None))
        self.yearlabel.setText(_translate("Dialog", "Year", None))
        self.label_2.setText(_translate("Dialog", "Day", None))
        self.SearchButton.setText(_translate("Dialog", "Go", None))
        self.label.setText(_translate("Dialog", "Month", None))

相应的python代码是，

import sys
import datetime
from PyQt4 import QtCore, QtGui
from timer import *
from PyQt4.QtGui import (QApplication, QTabWidget, QWidget,
                     QStyle, QStyleFactory)
class Window(QtGui.QDialog):


    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.ui = Ui_Dialog()
        self.ui.setupUi(self)

        style = QStyleFactory.create('Cleanlooks')
        app.setStyle(style)

        QtCore.QObject.connect(self.ui.SearchButton, QtCore.SIGNAL('clicked()'), self.search)

        months = range(1,13)
        for iitem in months:
            Months = str(iitem)
            self.ui.monthfromcomboBox.addItem(Months)

        days = range(1,32)
        for iitem in days:
            Days = str(iitem)
            self.ui.dayfromcomboBox.addItem(Days)



        years = range(2010, 2017)
        for iitem in years:
            Years = str(iitem)
            self.ui.yearfromcomboBox.addItem(Years)


     def search(self):
             nowyear = int(self.ui.yearfromcomboBox.currentText())
             nowmonth = int(self.ui.monthfromcomboBox.currentText())
             nowday = int(self.ui.dayfromcomboBox.currentText())

             nowdate = int('%d%d%d' %(nowyear,nowmonth,nowday))
             print nowdate

if __name__ == "__main__":

    app = QtGui.QApplication(sys.argv)
    viewer = Window()
    viewer.show()
    sys.exit(app.exec_())

Answer 1

这是我的解决方案：

dateNum = 201011

dateNum = str(dateNum)

year = dateNum[:4]
monthDay = dateNum[4:]

if len(monthDay) == 2:
    day = monthDay[1:]
    month = monthDay[:1]

print(year + "," + month + "," + day)

这将输出：

2010,1,1

此代码的唯一问题是您无法确定日期，例如：

2014111应该是11月1日，但也可能是1月11日

有什么方法可以更改格式以包含前导零？（例如2014年11月1日的20141101）

也许其他人有办法确定这一点。但是我认为逻辑上的格式使得无法确定其中一种。

重新定义此代码以处理前导零：

dateNum = 20100101

dateNum = str(dateNum)

year = dateNum[:4]
monthDay = dateNum[4:]

day = monthDay[2:]
month = monthDay[:2]

print(year + "," + month + "," + day)

2010,01,01

Answer 2

我建议使用datetime.datetime.strptime：

from datetime import datetime

date_int = 201011
date = datetime.strptime(str(date_int), '%Y%m%d')
print '{},{},{}'.format(date.year, date.month, date.day)

2010,1,1

Answer 3

没有理由将日期部分转换为字符串，然后转换为单个整数，如果实际上并不需要该整数。摆脱这一行：

nowdate = int('%d%d%d' %(nowyear,nowmonth,nowday))

而是使用您想要的个性化日期组件。它可以像print nowyear, nowmonth, nowday一样简单（它将用空格分隔它们），或者你可以做一些更复杂的事情，比如使用它们来创建datetime模块中你可以使用的东西（或打印）各种各样的格式。）

要获得您特别请求的输出（'2010,1,1'），您可以将其保持在与现有代码非常接近的位置。只需使用print '%d,%d,%d' % (nowyear, nowmonth, nowday)，或者如果您想使用较新的str.format语法print '{:d},{:d},{:d}'.format(nowyear, nowmonth, nowday)。如果您希望单个数字的月份或天数使用两个字符（因此它们的宽度始终相同），您可以在格式字符串中使用%02d或{:02d}来请求填充零宽度为2。

如何将Python整数转换为datetime

3 个答案: