本资料为完整的Python实验报告，涵盖了多个经典编程任务和算法实现，详细记录了实验过程、结果分析及源代码，适合学习与参考。
实验一：Python程序设计之初窥门径
实验二：Python程序设计之结构与复用
实验三：Python程序设计之组合数据类型
实验四：Python程序设计之文件
---
### 实验一
**正方形螺旋线**
```python
import turtle
turtle.speed(fastest)
turtle.pensize(2)
for x in range(100):
turtle.forward(2*x)
turtle.left(90)
```
**斜螺旋线**
```python
import turtle
turtle.speed(fastest)
turtle.pensize(2)
for x in range(100):
turtle.forward(2*x)
turtle.left(91)
```
**色彩斜螺旋线**
```python
import turtle
turtle.speed(fastest)
turtle.pensize(2)
colors = [red, yellow, purple, blue]
for i in colors:
for x in range(100):
turtle.color(i)
turtle.forward(x * 5)
turtle.left(91)
```
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