python 进程，,import osi

python 进程，,import osi

import osimport timeret = os.fork() # 创建子线程if ret ==0: # 子进程中返回值为0，父进程>0    while True:        print(‘......1......‘)        time.sleep(1)else:    while True:        print(‘......2......‘)        time.sleep(1)

多fork问题，以下代码会出现4个进程

import osimport timeret = os.fork()if ret ==0:    print(‘......1......‘)else:    print(‘......2......‘)ret = os.fork()if ret ==0:    print(‘......11......‘)else:    print(‘......22.....‘)

import osimport timeret = os.fork()if ret ==0:    print(‘......1......‘)else:    print(‘......2......‘)    ret = os.fork()    if ret ==0:        print(‘......11......‘)    else:        print(‘......22.....‘)

python 进程