Python程序员的就业前景及发展路径

# 示例代码：计算斐波那契数列
def fibonacci(n):
    if n <= 0:
        return None
    elif n == 1:
        return 0
    elif n == 2:
        return 1
    else:
        a, b = 0, 1
        for _ in range(n - 2):
            a, b = b, a + b
        return b

print(fibonacci(10))  # 输出55

# 示例代码：使用冒泡排序对列表进行排序
def bubble_sort(lst):
    n = len(lst)
    for i in range(n - 1):
        for j in range(n - 1 - i):
            if lst[j] > lst[j + 1]:
                lst[j], lst[j + 1] = lst[j + 1], lst[j]

lst = [5, 2, 9, 1, 7]
bubble_sort(lst)
print(lst)  # 输出[1, 2, 5, 7, 9]

# 示例代码：使用MySQL数据库
import pymysql

# 连接数据库
conn = pymysql.connect(host='localhost', user='root', password='123456', db='test')

# 创建游标
cursor = conn.cursor()

# 执行SQL语句
cursor.execute('SELECT * FROM students')

# 获取查询结果
results = cursor.fetchall()

# 打印查询结果
for row in results:
    print(row)

# 关闭游标和数据库连接
cursor.close()
conn.close()

# 示例代码：使用Flask框架搭建一个简单的Web应用
from flask import Flask

app = Flask(__name__)

@app.route('/')
def index():
    return 'Hello, World!'

if __name__ == '__main__':
    app.run()