[英]what is the use of pexpect.EOF and pexpect.TIMEOUT in python?
pexpect.EOF 和 pexpect.TIMEOUT 在 python 中的用途是什么。在哪个场景中它会很有用?
EOF 和 TIMEOUT 的解释在这里,但是,简而言之:
expect
或expect_exact
找不到搜索项之一,它将超时。下面是一个例子:
#!/usr/bin/python3
import pexpect
print("Pexpect TIMEOUT and EOF Test:")
child = pexpect.spawn("/usr/bin/env python")
child.expect(">>>")
# Works: You will find the search string (>>>)
child.sendline("print('This is a test.')")
index = child.expect_exact([">>>", pexpect.TIMEOUT, pexpect.EOF, ])
if index == 0:
print("'>>>' was found, as expected.")
# TIMEOUT: You will not find the search string (Waldo)
child.sendline("print('This is another test.')")
index = child.expect_exact(["Waldo", pexpect.TIMEOUT, pexpect.EOF, ], timeout=5)
if index == 1:
print("- 'Waldo' could not be found, " +
"and the search timed out after 5 seconds, as expected.")
child.sendline("exit()")
# EOF: The 'exit()' statement closed the child implicitly (no need for child.close())
# You cannot interact with a closed child, so Pexpect will return an EOF
index = child.expect_exact(["]$", pexpect.TIMEOUT, pexpect.EOF, ])
if index == 2:
print("Pexpect returned an EOF error on a closed child, as expected.")
# However, you can still get information from the closed child
print("Left in the child: " + str(child.before))
输出:
Pexpect TIMEOUT and EOF Test:
- '>>>' was found, as expected.
- 'Waldo' could not be found, and the search timed out after 5 seconds, as expected.
- Pexpect returned an EOF error on a closed child, as expected.
- Left in the child: b" print('This is another test.')\r\nThis is another test.\r\n>>> exit()\r\n"
Script complete. Have a nice day.
Process finished with exit code 0
祝你的代码好运!
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