Python编程挑战赛初中组初赛模拟真题1

 ```python

   a = int(input())

   print(a + 10)

   ```

 ```python

   x = 15

   if x > 10:

       print("A")

   elif x > 5:

       print("B")

   else:

       print("C")

   ```

 ```python

   for i in range(3, 8, 2):

       print(i)

   ```

```python

   nums = [1, 2, 3]

   nums.pop(1)

   print(nums)

   ```

 ```python

   d = {'a': 1, 'b': 2}

   d['c'] = 3

   print(d)

   ```

```python

   def add(a, b=2):

       return a + b

   print(add(3))

   ```

 ```python

   matrix = [[1, 2], [3, 4]]

   print(matrix[1][0])

   ```

 ```python

   import random

   print(random.randint(5, 10))

   ```

 ```python

    s = "hello"

    print(s[1:3])

    ```

 ```python

    n = 5

    while n > 0:

        print(n)

        n -= 1

        if n == 2:

            break

    ```

```python

    a = [3, 1, 4]

    a.sort()

    print(a)

    ```

```python

    def func():

        return 2, 3

    print(func())

    ```