string to be sent to the child process, or None, if no data should be sent to the child. communicate() returns a tuple (stdout, stderr). 与子进程进行交互,像stdin发送数据,并从stdout和stderr读出数据存在一个tuple中并返回。 参数input应该是一个发送给子进程的字符串,如果未指定数据,将传入None。
>>> res = subprocess.Popen("lm -l",shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE) >>> res.stderr.read() #标准输出错误 '/bin/sh: lm: command not found\n' >>> obj.stderr.close() #关闭启动程序的标准错误 1. 2. 3. 4. 5. 注意:上面的提到的标准输出都为啥都需要等于subpr...
Return output (stdout or stderr) of executing cmd in a shell.Like getstatusoutput(), except the exit status is ignored and the returnvalue is a string containing the command's outputcmd可以直接执行shell命令,而不需要cmd命令以列表输入---subprocess.getoutput("cat /proc/meminfo")返回值包含cmd的...
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=subprocess.PIPE, stderr=subprocess.PIPE, check=True) 如果传入参数同时传入shell=True,则传入一个字符串args,shell命令而不是待执行的shell命令序列 实例: >>> subprocess.run(["ls","-l"])#doesn't capture out...
然后,我们创建一个新的脚本 ‘main.py’,使用 subprocess.Popen 将字符串传递给 ‘count_letters.py’ 并获取结果: # main.pyimportsubprocessdefcount_letters(string):p=subprocess.Popen(['python','count_letters.py'],stdin=subprocess.PIPE,stdout=subprocess.PIPE,stderr=subprocess....
process1 = subprocess.Popen(["ls", "/path/to/directory"], stdout=subprocess.PIPE, text=True)...
subprocess模块的异常基类 subprocess.TimeoutExpired 子进程执行超时。 属性 cmd:指令 timeout:秒为单位的时间 output:run()或check_output()函数捕获到的子进程的输出,否则为None stdout:output属性别名 stderr:run()函数捕获到的子进程的错误输出,否则为None ...
CompletedProcess(args=['ls', 'file.txt'], returncode=2, stdout='', stderr="ls: cannot access 'file.txt': No such file or directory\n") 上面的例子是通过run()方法执行了“ls file.txt”指令,由于当前目录下没有file.txt文件,因此ls会输出错误信息。run(...
2.subprocess模块实现比对，SAM转BAM，排序，索引全部流程 2.1.创建python的test环境 先激活base环境，...
If you’re on a UNIX-based system where almost all typical shell commands are separate executables, then you can just set the input of the second process to the .stdout attribute of the first CompletedProcess: Python >>> import subprocess >>> ls_process = subprocess.run(["ls", "/usr/...