>>> subprocess.check_output(['echo', 'hello world'], universal_newlines=True, shell=True) '"hello world"\n' >>> subprocess.check_output('exit 1', shell=True) Traceback (most recent call last): …… subprocess.CalledProcessError: Command 'exit 1' returned non-zero exit status 1 >>>...
import subprocess # 创建第一个命令的进程 process1 = subprocess.Popen(["ls", "/path/to/directo...
stdout and stderr are not captured, and those attributeswill be None. Pass stdout=PIPE and/or stderr=PIPE in order to capture them.check等于True的时候,当执行状态不是0时,会抛出CalledProcessError异常提示传入命令参数时,需要以多个命令拆分按照列表形式传入:subprocess.run(['df', '-h'], stdout...
>>> p1=subprocess.Popen('cat /etc/passwd',shell=True,stdout=subprocess.PIPE) >>> p2=subprocess.Popen('grep 0:0',shell=True,stdin=p1.stdout,stdout=subprocess.PIPE) >>> p3=subprocess.Popen("cut -d ':' -f 7",shell=True,stdin=p2.stdout,stdout=subprocess.PIPE) >>> print p3.stdout...
subprocess.PIPE是-1,为什么Popen这个类的stdout变成了什么对象,可以用readline方法呢 打印type可以知道Popen对象的stdout的类型是file,我们看看subprocess里做了什么操作。 我们看看Popen的init方法(python 2.7.8) stdout传入_get_handles函数准换出(p2cread, p2cwrite,c2pread, c2pwrite,errread, errwrite) ...
import subprocess obj = subprocess.Popen(["python"], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE) a = 1 obj.stdin.write(b"print(%s);"%str(a).encode('utf-8'))#注意输入的是字节类型 obj.stdin.write(b"print(2);") obj.stdin.write(b"print(3);") obj.stdin....
还想用subprocess的话，可以试试调用write()的时候，再write()一个'\n'，input()获取的输入貌似是不...
from argparse import ArgumentParser from pathlib import Path import subprocess def create_new_project(name): project_folder = Path.cwd().absolute() / name project_folder.mkdir() (project_folder / "README.md").touch() with open(project_folder / ".gitignore", mode="w") as f: f.write(...
问强制subprocess.Popen使用write()函数而不是fileno()将stdout/stderr写入python中类似文件的对象EN子进程...
(self)->None:print(f'子进程的名称:{self.name},PID:{os.getpid()},PPID:{os.getppid()}')if__name__=='__main__':print('主进程开始执行')lst=[]foriinrange(5):p=SubProcess(f'进程--{i}')p.start()# 这里会执行自定义类中的run()方法lst.append(p)foriinlst:i.join()print('主...