python使用多线程时怎么查看每个线程的存在时间和执行了多少次目标函数以及线程的基本参数
时间: 2024-02-13 08:05:41 浏览: 122
在 Python 中,我们可以通过 threading 模块中的 Thread 类来创建和管理线程。要查看每个线程的存在时间和执行了多少次目标函数以及线程的基本参数,可以通过以下步骤实现:
1. 导入 threading 模块:
```python
import threading
```
2. 创建一个自定义的线程类,继承自 Thread 类,重写 run() 方法,并在其中添加需要执行的目标函数:
```python
class MyThread(threading.Thread):
def __init__(self, name, target):
threading.Thread.__init__(self)
self.name = name
self.target = target
self.count = 0
def run(self):
print("Starting " + self.name)
while True:
self.count += 1
self.target()
print("Exiting " + self.name)
```
3. 创建线程对象并启动线程:
```python
def target_function():
# 目标函数的具体实现
pass
thread1 = MyThread("Thread 1", target_function)
thread2 = MyThread("Thread 2", target_function)
thread1.start()
thread2.start()
```
4. 在主线程中使用 join() 方法等待所有子线程执行完毕:
```python
thread1.join()
thread2.join()
```
5. 在目标函数中添加相应的打印语句,以便查看每个线程的执行情况:
```python
def target_function():
print("Executing target function in " + threading.current_thread().name)
# 目标函数的具体实现
```
6. 在自定义的线程类中添加相应的打印语句,以便查看线程的基本参数和存在时间:
```python
class MyThread(threading.Thread):
def __init__(self, name, target):
threading.Thread.__init__(self)
self.name = name
self.target = target
self.count = 0
def run(self):
print("Starting " + self.name)
while True:
self.count += 1
print("Thread " + self.name + " has executed target function " + str(self.count) + " times")
self.target()
print("Exiting " + self.name)
def __str__(self):
return "Thread " + self.name
```
这样,我们就可以通过打印语句来查看每个线程的存在时间、执行次数以及线程的基本参数。
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