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import subprocess, TIMe
subproc = subprocess.Popen(['c:Python31python.exe', 'c:/b.py'], stdin=subprocess.PIPE, shell=True)
time.sleep(0.5)
print('start')
subproc.stdin.write('datan')
subproc.communicate('datan')
print('end')
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b.py：
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import sys
print('receive...')
s = sys.stdin.readline()
print('get:', len(s), s)
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