python申明变量

```python

import socket

# 声明个布尔变量来表示设备是否在线

device_online = False

try:

# 尝试连接到设备

s = socket.create_connection(('your_device_ip', ))

device_online = True

except OSError:

pass

if device_online:

print("Device is online")

else:

print("Device is offline")

```

```python

# 声明些与太空旅行相关的变量

departure_date = "--"

arrival_date = "--"

departure_speed = # m/s^

```

```python

# 声明些与零售业相关的变量

product_name = "iPhone "

product_price =

current_stock =

```

```python

# 声明些与社会责任管理相关的变量

donation_amount =

volunteer_hours =

```