Python 关闭writechannel后的QProcess输出

如何运行两个命令并查看输出。大概是这样的：

process.write('myVar = 2')
process.write('print myVar')

并查看我的每个命令的输出。如果我关闭writechannel查看输出，我将无法再与进程通信。这是我的密码：

from PyQt4.QtCore import *
process = QProcess()
process.start('python -i')

process.waitForFinished(100)
process.readAllStandardOutput()

process.write('2+2')
process.closeWriteChannel()
process.waitForFinished(100)
print process.readAllStandardOutput()

---

您应该使用

QProcess

的

readyReadStandardOutput

和

readyReadStandardError

信号，在有一些数据可读取时获得通知

如果你想发送两行，你只需要用换行符把它们分开

例如：

from PyQt4.QtCore import *

app = QCoreApplication([])
process = QProcess()

def read_out():
    print 'stdout:', str(process.readAllStandardOutput()).strip()


def read_err():
    print 'stderr:', str(process.readAllStandardError()).strip()


process.readyReadStandardOutput.connect(read_out)
process.readyReadStandardError.connect(read_err)

process.start('python -i')
process.write('2+2\n')
process.write('1+1\n')

process.closeWriteChannel()
process.waitForFinished()

app.processEvents()

输出：

stderr: Python 2.7.4 (default, Apr 19 2013, 18:28:01) [GCC 4.7.3] on linux2 stderr: Type "help", "copyright", "credits" or "license" for more information. stderr: >>> stdout: 4 stderr: >>> stdout: 2 stderr: >>>

---

非常感谢，它很有效。我忘记了命令末尾的“\n”。 stderr: Python 2.7.4 (default, Apr 19 2013, 18:28:01) [GCC 4.7.3] on linux2 stderr: Type "help", "copyright", "credits" or "license" for more information. stdout: 4 2 stderr: >>> >>> >>>