(例)
~/.config/ibus/bus/49ba92f181ac4a7caf727f7c56429585-unix-wayland-0 

$ time python excel2tsv_e.py KEN_ALL.xlsx > ken_all2.txt 

real    0m38.720s
user    0m38.614s
sys     0m0.105s

$ time python excel2tsv_p.py KEN_ALL.xlsx

real    0m47.467s
user    0m47.094s
sys     0m1.139s

            for event, elem in parser.read_events():
                if event == "end":
                    yield event, elem, stack
                    stack.pop()
                    if 1 <= len(stack) <= 2:
                        stack[-1].remove(elem)
                    level -= 1
                else:
                    level += 1
                    stack.append(elem)
                    yield event, elem, stack

$ ./a.out
$ $PIPEIN | bash | tee /dev/stderr | python ./test.py | tee /dev/stderr | $PIPEOUT

import re
def send(s):
    RET = "@@RETURN VALUE@@"
    print(s+";echo {} $?".format(RET))
    outputs = []
    while True:
        output = input()
        if re.search("^{} ".format(RET), output):
            m = re.match("^{} (.*)".format(RET), output)
            return (int(m.groups()[0]), outputs)
        outputs.append(output)

import sys
print(send("ping www.google.co.jp -c 4"), file=sys.stderr)
print(send("ls ----"), file=sys.stderr)

$ mkfifo net
$ bash < net 2>&1 | tee /dev/stderr | python ls.py | tee net
ping www.google.co.jp -c 4;echo @@RETURN VALUE@@ $?
PING www.google.co.jp (142.250.206.195) 56(84) bytes of data.
64 bytes from kix07s07-in-f3.1e100.net (142.250.206.195): icmp_seq=1 ttl=56 time=14.8 ms
64 bytes from kix07s07-in-f3.1e100.net (142.250.206.195): icmp_seq=2 ttl=56 time=16.6 ms
64 bytes from kix07s07-in-f3.1e100.net (142.250.206.195): icmp_seq=3 ttl=56 time=15.8 ms
64 bytes from kix07s07-in-f3.1e100.net (142.250.206.195): icmp_seq=4 ttl=56 time=15.4 ms

--- www.google.co.jp ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3005ms
rtt min/avg/max/mdev = 14.760/15.666/16.645/0.681 ms
@@RETURN VALUE@@ 0
(0, ['PING www.google.co.jp (142.250.206.195) 56(84) bytes of data.', '64 bytes from kix07s07-in-f3.1e100.net (142.250.206.195): icmp_seq=1 ttl=56 time=14.8 ms', '64 bytes from kix07s07-in-f3.1e100.net (142.250.206.195): icmp_seq=2 ttl=56 time=16.6 ms', '64 bytes from kix07s07-in-f3.1e100.net (142.250.206.195): icmp_seq=3 ttl=56 time=15.8 ms', '64 bytes from kix07s07-in-f3.1e100.net (142.250.206.195): icmp_seq=4 ttl=56 time=15.4 ms', '', '--- www.google.co.jp ping statistics ---', '4 packets transmitted, 4 received, 0% packet loss, time 3005ms', 'rtt min/avg/max/mdev = 14.760/15.666/16.645/0.681 ms'])
ls ----;echo @@RETURN VALUE@@ $?
ls: unrecognized option '----'
Try 'ls --help' for more information.
@@RETURN VALUE@@ 2
(2, ["ls: unrecognized option '----'", "Try 'ls --help' for more information."])

	Node := delNode
	for {
		parent := Node.parent
		if parent == nil {
			//case 1
			break
		}

		dir := Node.dir()
		dirOther := dir ^ 1
		sibling := parent.children[dirOther]

		if sibling.isRed {
			//case 2
			parent.flip(dirOther)
			sibling.isRed = false
			parent.isRed = true
			sibling = parent.children[dirOther]
		}
		//sibling is Black

		nephew := sibling.children[dirOther]
		if nephew == nil || !nephew.isRed {
			//far nephew is Black
			nephew = sibling.children[dir]
			if nephew == nil || !nephew.isRed {
				//near nephew is Black
				sibling.isRed = true
				if parent.isRed {
					//case 4
					parent.isRed = false
					break
				} else {
					//case 3
					Node = parent
					continue
				}
			}
			//case 5
			//near nephew is Red and far nephew is Black
			sibling.flip(dir)
			sibling, nephew = nephew, sibling
			sibling.isRed = false
			nephew.isRed = true
		}
		//case 6
		//sibling is Black && far nephew is Red

		saveColor := parent.isRed
		parent.flip(dirOther)
		sibling.isRed = saveColor
		parent.isRed = false
		nephew.isRed = false
		break

	}