[英]Python subprocess and running script on directory
我试图运行子进程。 我在目录上运行一个python文件(以转换目录中的每个文件。)转换器工作,并且已将其实现为gui(PYQT4)。 这是到目前为止我得到的:
def selectFile(self):
self.listWidget.clear() # In case there are any existing elements in the list
directory = QtGui.QFileDialog.getExistingDirectory(self,
"Pick a folder")
if directory:
for file_name in os.listdir(directory):
if file_name.endswith(".csv"):
self.listWidget.addItem(file_name)
print (file_name)
def convertfile(self, directory):
subprocess.call(['python', 'Createxmlfromcsv.py', directory], shell=True)
我得到的错误是..
Traceback (most recent call last):
File "/Users/eeamesX/PycharmProjects/Workmain/windows.py", line 162, in convertfile
subprocess.call(['python', 'Createxmlfromcsv.py', directory], shell=True)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 522, in call
return Popen(*popenargs, **kwargs).wait()
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 710, in __init__
errread, errwrite)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py", line 1335, in _execute_child
raise child_exception
TypeError: execv() arg 2 must contain only strings
任何初学者的帮助,表示赞赏:)
从评论到问题,该行:
self.convertButton.clicked.connect(self.convertfile)
单击按钮时,会将False
发送到convertfile
方法,这就是您看到该错误的原因。
您需要向convertfile
添加一些代码,该代码将从list-widget中的所选项目获取目录路径。 就像是:
item = self.listWidget.currentItem()
if item is not None:
directory = unicode(item.text())
subprocess.call(['python', 'Createxmlfromcsv.py', directory])
但是请注意,您没有将完整目录路径存储在list-widget中,因此子流程调用可能会失败。 您确实应该像这样将项目添加到列表小部件:
self.listWidget.addItem(os.path.join(directory, file_name))
在“ subprocess.call(['python','Createxmlfromcsv.py',directory],shell = True)”中,“ directory”变量不是字符串。
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