指令在应用程序中不起作用

# 错误示例
if x = 1  # 应该是 == 而不是 =
print("x is 1")

# 正确示例
if x == 1:
    print("x is 1")

# 错误示例
def calculate_average(numbers):
    total = sum(numbers)
    average = total / len(numbers)  # 如果numbers为空，会导致除以零错误
    return average

# 正确示例
def calculate_average(numbers):
    if not numbers:
        return 0
    total = sum(numbers)
    average = total / len(numbers)
    return average

# 错误示例
try:
    with open('nonexistent_file.txt', 'r') as file:
        content = file.read()
except FileNotFoundError:
    print("文件不存在")

# 安装缺失的库
pip install missing_library

# 检查库版本
pip show missing_library

import threading

lock = threading.Lock()

def safe_increment(counter):
    with lock:
        counter += 1