Python子流程采用不同的方法

我有以下结构

- folder1
-- script1.py
- folder2
-- script2_1.py
-- script2_2.py
- folder2
-- script3.py

script2_1.py中有以下行

os.system("python3 script2_2.py "+str(id))

如果我使用SSH连接到实例中，请将cd连接到folder2，然后运行script2_1.py

python3 script2_1.py

它工作正常，按预期调用script2_2.py

---

现在在script1.py中，我想同时调用script2_2.py和script3.py。我已经测试了不同的方法，但还没有成功

方法1：

id = str(id)
subprocess.check_call(["/folder2", "script2_2.py "+id])
subprocess.check_call(["/folder3", "script3.py "+id])

给

PermissionError:[Errno 13]权限被拒绝：'/folder2'

方法2:

id = str(id)
commands = '''
cd /folder2/ 
python3 script2_2.py {} 
cd /folder3/ 
python3 script3.py {} 
'''.format(id, id)
p = subprocess.Popen("/bin/sh", stdin=subprocess.PIPE, stdout=subprocess.PIPE)
out, err = p.communicate(commands.encode('utf-8'))

id = str(id)
subprocess.call(['cd /folder2/','python3 script2_2.py {}'.format(id)])
subprocess.call(['cd /folder3/','python3 script3.py {}'.format(id)])

给

/bin/sh:python3:未找到

方法3:

id = str(id)
commands = '''
cd /folder2/ 
python3 script2_2.py {} 
cd /folder3/ 
python3 script3.py {} 
'''.format(id, id)
p = subprocess.Popen("/bin/sh", stdin=subprocess.PIPE, stdout=subprocess.PIPE)
out, err = p.communicate(commands.encode('utf-8'))

id = str(id)
subprocess.call(['cd /folder2/','python3 script2_2.py {}'.format(id)])
subprocess.call(['cd /folder3/','python3 script3.py {}'.format(id)])

给

FileNotFoundError:[Errno 2]没有这样的文件或目录：'cd/folder2/'：'cd/folder2/'

方法4：

id = str(id)
subprocess.check_call(["/folder2", "script2_2.py "+id])
subprocess.check_call(["/folder3", "script3.py "+id])

在本例中，我使用字符串和列表测试了args，指定了.py文件的完整路径，带和不带shell=True，不带sys.path，在subprocess.call中带完整路径

id = str(id)
#import sys
#sys.path.insert(1, '/folder2/')
subprocess.call(['/usr/local/bin/python3','/folder2/script2_2.py {}'.format(id)])
#sys.path.insert(1, '/folder3/')
subprocess.call(['/usr/local/bin/python3','/folder3/script3.py {}'.format(id)])

给

/usr/local/bin/python3:无法打开文件“/folder2/script2_2.py 80”：[Errno 2]没有这样的文件或目录

/usr/local/bin/python3:无法打开文件“/folder3/script3.py 80”：[Errno 2]没有这样的文件或目录

---

最终，我通过使用和修改方法2，以及python3的完整路径，成功地解决了这个问题

id = str(id)
commands = '''
cd /folder2/ 
/usr/local/bin/python3 script2_2.py {} 
cd /folder3/ 
/usr/local/bin/python3 script3.py {} 
'''.format(id, id)
p = subprocess.Popen("/bin/sh", stdin=subprocess.PIPE, stdout=subprocess.PIPE)
out, err = p.communicate(commands.encode('utf-8'))

为了知道哪一个是我SSH到实例中并运行

which python3

返回的

/usr/local/bin/python3