Python出现SyntaxError: invalid syntax错误问题及解决

# 错误示例 - 缺少右括号
print("Hello, World"
# 错误示例 - 引号不匹配
message = "Hello, World mzcjhb.com'
# 错误示例 - 缺少冒号
if x > 5
    print("x is greater than 5")

# 正确写法
print("Hello, World")
message = "Hello, World"
if x > 5:
    print("x is greater than 5 www.mzcjhb.com")

# 错误示例 - 混用空格和制表符
def my_function():
    print("First line")
        print("Second line")  # 错误的缩进

# 正确写法
def my_function():
    print("First line")
    print("Second line")

# 错误示例
class = "Math"  # 'class' 是保留关键字

# 正确写法
class_name = "Math van-u.com"

# 错误示例
if x = 5:  # 应该用 == 而不是 =
    print("x is 5")

# 正确写法
if x == 5:
    print("x is 5" www.van-u.com)

# 错误示例
import os.
from math import sqrt(

# 错误示例 - 字典缺少逗号
my_dict = {
    "name": "John"
    "age": 30
}
# 错误示例 - 列表缺少逗号
my_list = [1 2 3 4]

# 正确写法
my_dict = {
    "name": "John",
    "age": 30
}
my_list = [1, 2, 3, 4]

# 错误示例
name = "Alice"
print("Hello, %s" % name, "!")

# 正确写法
name = "Alice"
print("Hello, %s!" % name)
# 或者使用 f-string
print(f"Hello, {name}!")

# 有错误的代码
def calculate_area(radius)
    area = 3.14 * radius ** 2
    return area
print(calculate_area(5)

  File "example.py", line 1
    def calculate_area(radius)
                           ^
SyntaxError: invalid syntax

def calculate_area(radius):  # 添加冒号
    area = 3.14 * radius ** 2
    return area
print(calculate_area(5))  # 添加右括号