Python for 循环嵌套和Python while 循环嵌套的语法分别是什么？

Python循环语句

• for语句

words = ['aaa', 'bbb', 'ccc']
for w in words:
    print(w)

• while 语句

# 例：一个执行十次的循环：
i=0
while i < 10:
    i += 1
    print (i, 'hello')
else:
    print('else中的代码块')

Python for 循环嵌套语法：

for iterating_var in sequence: for iterating_var in sequence: statements(s) statements(s)

Python while 循环嵌套语法：

while expression: while expression: statement(s) statement(s)