我正在尝试在python3中为pdb创建调试器包装，该包装将接收pdb定制命令作为输入并提供从pdb接收的输出。在代码中，pdb打开一个文件作为输入，然后开始接收命令。由于阻塞输出流的问题，我将输出写入文件，我已经将两个文件流创建到文件“ tmp_out_file.txt”，一个用于写入，另一个用于读取文件。代码的写入部分正常工作，并且输出已写入文件。但是，当我从文件中读取文件时，stdout上没有显示输出
我已经通过vscode调试器运行了该程序。当我逐行运行程序时，代码工作正常，并将输出打印到stdout。但是，当我连续运行代码或跳过debugger.py中的o = c.reciever('s')行时（调试时），它不会输出任何输出。
Communicator.py
import os
import sys
from subprocess import PIPE, Popen
from threading import Thread
from watcher import Watcher
class Communicator:
def __init__(self, filename):
self.cur_dir = os.getcwd()
self.cmd = " ".join(['python', '-m', 'pdb', filename])
self.tmp_write_stream = open('tmp_out_file.txt', 'wb')
self.tmp_read_stream = open('tmp_out_file.txt', 'rb')
self.p = Popen(self.cmd, stdin=PIPE, stdout=self.tmp_write_stream, stderr=self.tmp_write_stream)
def parse(self, res):
u = res.split('(Pdb)')
r = []
for v in u:
tmp = v.strip()
if len(tmp) > 0:
r.append(tmp)
return r
def read_output(self):
print(self.tmp_read_stream.tell())
try:
p = self.tmp_read_stream.read()
# self.tmp_read_stream.flush()
p = self.parse(p.decode('utf-8'))
print(self.tmp_read_stream.tell())
return p
except Exception as e:
print(f"[!!Error]: {e}", flush=True)
def write_input(self, value):
print(self.tmp_write_stream.tell())
value = value.strip('\r')
value = value.strip('\n')
value = value + "\r\n"
print(f"[In]: {value}", flush=True)
self.p.stdin.write(value.encode('utf-8'))
self.p.stdin.flush()
print(self.tmp_write_stream.tell())
def reciever(self, cmd):
self.write_input(cmd)
d = self.read_output()
try:
with open('tmp.txt', 'wb') as t:
t.write(d)
except Exception as e:
pass
return d
def clear(self):
return self.read_output()
def close(self):
if self.tmp_read_stream != None:
self.tmp_read_stream.close()
if self.tmp_write_stream != None:
self.tmp_write_stream.close()
debugger.py
import communicator as comm
import os
c = comm.Communicator('./test/cmp.py')
# w = wtc.Watcher(c)
# w.push('l')
# w.push('r')
# w.push('arr')
c.clear()
for i in range(100):
o = c.reciever('s')
print(f"[Out]: {o}", flush=True)
# w.probe()
c.close()
Watcher.py（调试器监视，以跟踪调试时要监视的变量值）
class Watcher:
def __init__(self, communicator):
self.watchVariables = {}
self.index = 0
self.keylist = []
self.communicator = communicator
self._freeze = False
def push(self, key):
if self._freeze == False:
if key not in self.watchVariables:
self.watchVariables[key] = None
def pop(self, key):
if self._freeze == False:
if key in self.watchVariables:
del self.watchVariables[key]
def probe(self):
self._freeze = True
for key in self.watchVariables.keys():
res = self.communicator.reciever('p ' + key)
self.watchVariables[key] = res
self._freeze = False
def update(self, key, value):
if key in self.watchVariables:
self.watchVariables[key] = value
cmp.py（运行调试器的文件）
def partition(arr, l, r):
i = l - 1
p = arr[r]
for j in range(l, r):
if arr[j] < p:
i = i + 1
arr[i], arr[j] = arr[j], arr[i]
i = i + 1
arr[i], arr[r] = arr[r], arr[i]
return (i, arr)
def quicksort(arr, l, r):
if l < r:
p, arr = partition(arr, l, r)
arr = quicksort(arr, l, p - 1)
arr = quicksort(arr, p + 1, r)
return arr
ats = [2, 1, 4, 5, 10, 8, 6]
print(quicksort(ats, 0, len(ats) - 1))
这是我从vscode调试器运行时收到的正确输出的示例：
0 80 80 161 80 161 出：['> d：\ learning \ deb \ test \ cmp.py（13）（）\ r \ n-> def quicksort（arr，l，r）：']
这是我从Powershell或终端运行时收到的输出
0 0 0 0 0 0 0 在：p l
0 0 0 0 在：p r
0 0 0 0 在：p arr
0 0 0 0 它甚至没有显示任何一致的输出