python快速编程入门练习题

1. 打印“Hello, Python!”
python
print("Hello, Python!")
2. 创建一个列表并打印其元素
python
my_list = [1, 2, 3, 4, 5]
print(my_list)
3. 创建一个字典并打印其键值对
python
my_dict = {"name": "John Doe", "age": 30}
print(my_dict["name"])
print(my_dict["age"])
4. 使用循环打印列表元素
python
for element in my_list:
print(element)
5. 使用条件语句检查数字是否大于 5
python
number = 6
if number > 5:
print("Greater than 5")
else:
print("Less than or equal to 5")
6. 创建一个函数计算两个数字的和
python
def add(a, b):
return a + b
result = add(10, 20)
print(result)
7. 使用文件操作读取并打印文件内容
python
with open("text.txt", "r") as file:
content = file.read()
print(content)
8. 创建并写入一个文件
python
with open("new_file.txt", "w") as file:
file.write("This is a new file.")
9. 使用异常处理捕获错误
python
try:
number = int(input("Enter a number: "))
except ValueError:
print("Invalid input. Please enter an integer")
10. 使用正则表达式查找字符串中的模式
python
import re
pattern = r"\d+"
string = "The number is 12345"
match = re.search(pattern, string)
if match:
print(match.group())