pathon常用代码
时间: 2024-09-27 16:13:04 浏览: 13
Python是一种高级编程语言,它以其简洁、易读的语法而闻名。以下是几个常见的Python代码片段:
1. **打印Hello World**:
```python
print("Hello, World!")
```
2. **变量赋值与数据类型**:
```python
name = "Alice" # 字符串
age = 30 # 整数
pi = 3.14159 # 浮点数
```
3. **条件判断** (if-else):
```python
if age > 18:
print("成年人")
else:
print("未成年人")
```
4. **循环** (for和while):
```python
for i in range(5): # 遍历0到4
print(i)
while condition: # 当条件为真时持续循环
do_something()
```
5. **函数定义**:
```python
def greet(name):
return f"你好,{name}!"
greeting = greet("Bob") # 调用函数
```
相关问题
Python常用代码
Python是一门简洁易读的高级编程语言,常用于数据分析、Web开发、科学计算等领域。下面是一些常见的Python代码片段:
1. **Hello World** 示例,这是大多数编程语言入门的第一个程序:
```python
print("Hello, World!")
```
2. **变量和数据类型**:
```python
name = "Alice" # 字符串
age = 25 # 整数
num_list = [1, 2, 3] # 列表
```
3. **条件语句(if-else)**:
```python
if condition:
print("Condition is True")
else:
print("Condition is False")
```
4. **循环(for和while)**:
```python
for item in ['a', 'b', 'c']:
print(item)
i = 0
while i < 5:
print(i)
i += 1
```
5. **函数定义**:
```python
def greet(name):
return f"Hello, {name}!"
```
6. **列表推导式(List Comprehension)**:
```python
squares = [x**2 for x in range(5)]
```
7. **模块导入(如NumPy)**:
```python
import numpy as np
array = np.array([1, 2, 3])
```
Python常用代码.
以下是一些Python常用代码:
1. 输出
```python
print("Hello, World!")
```
2. 变量
```python
x = 5
y = "John"
print(x)
print(y)
```
3. 数据类型
```python
x = 5
y = 3.14
z = "Hello"
print(type(x))
print(type(y))
print(type(z))
```
4. 运算符
```python
x = 5
y = 3
print(x + y)
print(x - y)
print(x * y)
print(x / y)
print(x % y)
print(x ** y)
print(x // y)
```
5. 列表
```python
fruits = ["apple", "banana", "cherry"]
print(fruits)
print(fruits[1])
fruits[1] = "kiwi"
print(fruits)
```
6. 循环
```python
fruits = ["apple", "banana", "cherry"]
for x in fruits:
print(x)
```
7. 条件语句
```python
x = 5
y = 10
if x > y:
print("x is greater than y")
elif x < y:
print("x is less than y")
else:
print("x and y are equal")
```
8. 函数
```python
def my_function(fname, lname):
print(fname + " " + lname)
my_function("John", "Doe")
```
9. 类
```python
class Person:
def __init__(self, name, age):
self.name = name
self.age = age
p1 = Person("John", 36)
print(p1.name)
print(p1.age)
```
以上是一些常用的Python代码片段,希望对你有所帮助!