si = subprocess.STARTUPINFO()
si.dwFlags |= subprocess.STARTF_USESHOWWINDOW
#si.wShowWindow = subprocess.SW_HIDE # default
subprocess.call('taskkill /F /IM exename.exe', startupinfo=si)
CREATE_NO_WINDOW = 0x08000000
subprocess.call('taskkill /F /IM exename.exe', creationflags=CREATE_NO_WINDOW)
DETACHED_PROCESS = 0x00000008
subprocess.call('taskkill /F /IM exename.exe', creationflags=DETACHED_PROCESS)
...
output = bytearray(self.process.readAllStandardOutput())
output = output.decode(self.GetCMD_Encoding())
print (output)
def GetCMD_Encoding(self):
CMD = QProcess(self)
CMD.setProcessChannelMode(QProcess.MergedChannels)
CMD.start("C:\Windows\System32\chcp.com")
CMD.waitForReadyRead()
output = bytearray(CMD.readAllStandardOutput())
output = output.decode("ascii")
output = output[18:]
return "cp" + output
References
https://stackoverflow.com/questions/41761132/pyqt-qprocess-readallstandardoutput-encoding
https://stackoverflow.com/questions/57663191/how-to-convert-a-qbytearray-to-a-python-string-in-pyside2
import sys
from PyQt4 import QtGui, QtCore
from PyQt4.QtCore import QProcess
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
command = "./testCommand.py"
args = [""]
#"regular" startDetached : give two arguments, get a boolean
process=QProcess()
re=process.startDetached("ls",["."])
print(re)
print(type(re))
#"overload" startDetached : give three arguments, get a tuple(boolean,PID)
process2=QProcess()
re,pid=process2.startDetached("ls",["."],".")
print(re,pid)
print(type(re),type(pid))
if self.mosquitto_process is None:
self.mosquitto_process = QProcess()
self.mosquitto_process.start("mosquitto.cmd")
self.port = utils.pick_free_port()
_logger().debug('starting server process: %s',
' '.join([self._interpreter, server.__file__,
str(self.port)]))
self._process = QtCore.QProcess()
self._process.readyRead.connect(self._on_ready_read)
self._process.setProcessChannelMode(self._process.MergedChannels)
self._process.finished.connect(self._on_finished)
self._process.stateChanged.connect(self._on_state_changed)
self._process.start(
self._interpreter, (server.__file__, str(self.port)))
proc = QProcess()
proc.start(*py_proc('print("Hello World")'))
dev = qtutils.PyQIODevice(proc)
assert not dev.closed
with pytest.raises(OSError) as excinfo:
dev.seek(0)
assert str(excinfo.value) == 'Random access not allowed!'
with pytest.raises(OSError) as excinfo:
dev.tell()
assert str(excinfo.value) == 'Random access not allowed!'
proc.waitForFinished(1000)
proc.kill()
assert bytes(dev.read()).rstrip() == b'Hello World'
References
https://programtalk.com/python-examples/PyQt5.QtCore.QProcess/
start_datetime.setSecsSinceEpoch(1234567890) start_datetime.toSecsSinceEpoch()
References
https://stackoverflow.com/questions/2935041/how-to-convert-from-timestamp-to-date-in-qt
Python timestamp to datetime
from datetime import datetime
timestamp = 1545730073
dt_object = datetime.fromtimestamp(timestamp)
print("dt_object =", dt_object)
print("type(dt_object) =", type(dt_object))
Python datetime to timestamp
from datetime import datetime
# current date and time
now = datetime.now()
timestamp = datetime.timestamp(now)
print("timestamp =", timestamp)
References
https://www.programiz.com/python-programming/datetime/timestamp-datetime
# from PySide import QtGui
from PyQt4 import QtGui
class CustomTextBrowser(QtGui.QTextBrowser):
'''Reimplment show event to append text'''
def showEvent(self, event):
# do stuff here
#self.append('This random text string ')
event.accept()
import PyQt5.QtWidgets print(PyQt5.QtWidgets.QStyleFactory.keys()) ['Breeze', 'Oxygen', 'QtCurve', 'Windows', 'Fusion']
app = QApplication([])
app.setStyle('Windows')
References
https://pythonbasics.org/pyqt-style/
Check if a process is running
import psutil
def checkIfProcessRunning(processName):
'''
Check if there is any running process that contains the given name processName.
'''
#Iterate over the all the running process
for proc in psutil.process_iter():
try:
# Check if process name contains the given name string.
if processName.lower() in proc.name().lower():
return True
except (psutil.NoSuchProcess, psutil.AccessDenied, psutil.ZombieProcess):
pass
return False;
# Check if any chrome process was running or not.
if checkIfProcessRunning('chrome'):
print('Yes a chrome process was running')
else:
print('No chrome process was running')
Find PID (Process ID) of a running process by Name
import psutil
def findProcessIdByName(processName):
'''
Get a list of all the PIDs of a all the running process whose name contains
the given string processName
'''
listOfProcessObjects = []
#Iterate over the all the running process
for proc in psutil.process_iter():
try:
pinfo = proc.as_dict(attrs=['pid', 'name', 'create_time'])
# Check if process name contains the given name string.
if processName.lower() in pinfo['name'].lower() :
listOfProcessObjects.append(pinfo)
except (psutil.NoSuchProcess, psutil.AccessDenied , psutil.ZombieProcess) :
pass
return listOfProcessObjects;
# Find PIDs od all the running instances of process that contains 'chrome' in it's name
listOfProcessIds = findProcessIdByName('chrome')
if len(listOfProcessIds) > 0:
print('Process Exists | PID and other details are')
for elem in listOfProcessIds:
processID = elem['pid']
processName = elem['name']
processCreationTime = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(elem['create_time']))
print((processID ,processName,processCreationTime ))
else :
print('No Running Process found with given text')
References
https://thispointer.com/python-check-if-a-process-is-running-by-name-and-find-its-process-id-pid/
*args
# Python program to illustrate
# *args for variable number of arguments
def myFun(*argv):
for arg in argv:
print (arg)
myFun('Hello', 'Welcome', 'to', 'GeeksforGeeks')
# Python program to illustrate
# *args with first extra argument
def myFun(arg1, *argv):
print ("First argument :", arg1)
for arg in argv:
print("Next argument through *argv :", arg)
myFun('Hello', 'Welcome', 'to', 'GeeksforGeeks')
**kwargs
# Python program to illustrate
# *kargs for variable number of keyword arguments
def myFun(**kwargs):
for key, value in kwargs.items():
print ("%s == %s" %(key, value))
# Driver code
myFun(first ='Geeks', mid ='for', last='Geeks')
# Python program to illustrate **kargs for
# variable number of keyword arguments with
# one extra argument.
def myFun(arg1, **kwargs):
for key, value in kwargs.items():
print ("%s == %s" %(key, value))
# Driver code
myFun("Hi", first ='Geeks', mid ='for', last='Geeks')
References
https://www.geeksforgeeks.org/args-kwargs-python/