Оператор with, похоже, неправильно закрывает файл (подпроцесс также использует файл) ⇐ Python
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Anonymous
Оператор with, похоже, неправильно закрывает файл (подпроцесс также использует файл)
A step that I am trying to achieve in my program (which is another auto grader, but in python) is to write a temporary txt file containing the output of an outside program (students' homework). I am able to successfully write the txt file using a with statement, but I am unable to then remove the file. To remove the txt file, I am using os.remove(file.txt) but I keep getting the following error:
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'file.txt'
I am assuming that this is because the with statement is not closing the txt file correctly. In an attempt to forcibly close the file, I have tried to add .close() but I know that that is a bit redundant. I am also considering that it could be the subprocess.Popen() line but I have used this in other programs and I haven't had issues with it when I have tried to manipulate the same file (i.e. writing a txt file, then later reading it). But in order to test this, I tried to use kill() but I'm having trouble getting that to work correctly.
If anyone can give me insight as to what is going wrong and hint at what I need to do, I'd appreciate it!
hw_file = f"{submissions_folder}\\TaylorDavisOnTime.java" # example of naming style for student assignments student_txt_file = hw_file.replace(f"{submissions_folder}\\", f"{submissions_folder}\\output\\").replace(".java", "Output.txt") with open(student_txt_file, "w") as file: output = subprocess.Popen(["java", hw_file], stdin=subprocess.PIPE, stdout=file, text=True) for input in input_values: output.stdin.write(input[0]) output.stdin.write(str(input[1])) output.stdin.write(str(input[2])) output.stdin.flush() output.stdin.close() # output.kill() # still playing with this remove = True file.close() # redundant, but does nothing if remove: os.remove(student_txt_file)
Источник: https://stackoverflow.com/questions/781 ... es-the-fil
A step that I am trying to achieve in my program (which is another auto grader, but in python) is to write a temporary txt file containing the output of an outside program (students' homework). I am able to successfully write the txt file using a with statement, but I am unable to then remove the file. To remove the txt file, I am using os.remove(file.txt) but I keep getting the following error:
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'file.txt'
I am assuming that this is because the with statement is not closing the txt file correctly. In an attempt to forcibly close the file, I have tried to add .close() but I know that that is a bit redundant. I am also considering that it could be the subprocess.Popen() line but I have used this in other programs and I haven't had issues with it when I have tried to manipulate the same file (i.e. writing a txt file, then later reading it). But in order to test this, I tried to use kill() but I'm having trouble getting that to work correctly.
If anyone can give me insight as to what is going wrong and hint at what I need to do, I'd appreciate it!
hw_file = f"{submissions_folder}\\TaylorDavisOnTime.java" # example of naming style for student assignments student_txt_file = hw_file.replace(f"{submissions_folder}\\", f"{submissions_folder}\\output\\").replace(".java", "Output.txt") with open(student_txt_file, "w") as file: output = subprocess.Popen(["java", hw_file], stdin=subprocess.PIPE, stdout=file, text=True) for input in input_values: output.stdin.write(input[0]) output.stdin.write(str(input[1])) output.stdin.write(str(input[2])) output.stdin.flush() output.stdin.close() # output.kill() # still playing with this remove = True file.close() # redundant, but does nothing if remove: os.remove(student_txt_file)
Источник: https://stackoverflow.com/questions/781 ... es-the-fil
