1、代码格式规范（可以通过Pycharm检查）

1. 操作符（operator）两边需要有空格（whitespace）
2. :（代码块指示符）左边不能有空格（whitespace）
3. 算数运算等不需要用圆括号（parentheses）
4. 函数或类末尾需要有两空行（blank lines）
5. 函数参数直接要有空格

2、案例

# This is a sample Python script.
 
# Press Shift+F10 to execute it or replace it with your code.
# Press Double Shift to search everywhere for classes, files, tool windows, actions, and settings.
 
 
def print_hi(name):
    # Use a breakpoint in the code line below to debug your script.
    print(f'Hi, {name}')  # Press Ctrl+F8 to toggle the breakpoint.
    a = 100
    if a < 1:
        print("a > 1")
    elif a > 10:
        print("a > 10")
    else:
        print("a is not a valid value")
 
 
def test_sum(a: int, b: int) -> int:
    print("a+b=", a+b)
    return a+b
 
 
def print_error(name):
    print(f'Warning, {name}')
 
 
# Press the green button in the gutter to run the script.
if __name__ == '__main__':
    print(__name__)
    print_hi('PyCharm')
    print_error('Error')
    test_sum(2, 10)
 
 
# See PyCharm help at https://www.jetbrains.com/help/pycharm/

3、格式检查