day11作业
1.请写出下列代码的执行结果：
例一：
def func1():
print('in func1' )
def func2():
print('in func2' )
ret = func1
ret() # func1()
ret1 = func2
ret1() # func2()
ret2 = ret
ret3 = ret2
ret2() # func1()
ret3() # func1()
result:
in func1
in func2
in func1
in func1
例二：
def func1():
print('in func1' )
def func2():
print('in func2' )
def func3(x, y):
x()
print('in func3' )
y()
print(111)
func3(func2, func1) # func2() print('in func3') func1()
print(222)
result:
111
in func2
in func3
in func1
222
例三（选做题）：
def func1():
print('in func1' )
def func2(x):
print('in func2' )
return x
def func3(y):
print('in func3' )
return y
ret = func2(func1) # in func2
ret() # func1()
ret2 = func3(func2) # in func3
ret3 = ret2(func1) # in func2
ret3() # func1()
result:
in func2
in func1
in func3
in func2
in func1
2.看代码写结果
def func(arg):
return arg.replace('苍老师', '***')
def run():
msg = "Alex的女朋友苍老师和大家都是好朋友"
result = func(msg)
print(result)
run()
result:
Alex的女朋友***和大家都是好朋友
def func(arg):
return arg.replace('苍老师', '***')
def run():
msg = "Alex的女朋友苍老师和大家都是好朋友"
result = func(msg)
print(result)
data = run()
print(data)
result:
Alex的女朋友***和大家都是好朋友
None
3.看代码写结果：
DATA_LIST = []
def func(arg):
return DATA_LIST.insert(0, arg)
data = func('绕不死你')
print(data)
print(DATA_LIST)
result:
['绕不死你']
[]
4.看代码写结果：
def func():
print('你好呀')
return '好你妹呀'
func_list = [func, func, func]
for item in func_list:
val = item()
print(val)
result:
你好呀
好你妹呀
你好呀
好你妹呀
你好呀
好你妹呀
5.看代码写结果：
def func():
print('你好呀')
return '好你妹呀'
func_list = [func, func, func]
for i in range(len(func_list)):
val = func_listi
print(val)
result:
你好呀
好你妹呀
你好呀
好你妹呀
你好呀
好你妹呀
6.看代码写结果：
def func():
return '烧饼'
def bar():
return '豆饼'
def base(a1, a2):
return a1() + a2()
result = base(func, bar)
print(result)
result: 烧饼豆饼
7.看代码写结果：
for item in range(10):
print(item)
print(item)
result: 0 1 2 3 4 5 6 7 8 9 9
]
8.看代码写结果：
def func():
for item in range(10):
pass
print(item)
func()
result: 9
9.看代码写结果：
item = '老男孩'
def func():
item = 'alex'
def inner():
print(item)
for item in range(10):
pass
inner()
func()
result: 9
10.看代码写结果：
l1 = []
def func(args):
l1.append(args)
return l1
print(func(1))
print(func(2))
print(func(3))
result:
[1]
[1, 2]
[1, 2, 3]
11.看代码写结果：
name = '太白'
def func():
global name
name = '男神'
print(name)
func()
print(name)
result: 太白 男神
12.看代码写结果：
name = '太白'
def func():
print(name)
func()
result: 太白
13.看代码写结果：
name = '太白'
def func():
print(name)
name = 'alex'
func()
result: local variable 'name' referenced before assignment
14.看代码写结果：
def func():
count = 1
def inner():
nonlocal count
count += 1
print(count)
print(count)
inner()
print(count)
func()
result: 1 2 2
15.看代码写结果：
def extendList(val, list=[]):
list.append(val)
return list
list1 = extendList(10)
list2 = extendList(123, [])
list3 = extendList('a')
print('list1=%s' % list1)
print('list2=%s' % list2)
print('list3=%s' % list3)
result:
list1=[10, 'a']
list2=[123]
list3=[10, 'a']
16.看代码写结果：
def extendList(val, list=[]):
list.append(val)
return list
print('list1=%s' % extendList(10))
print('list2=%s' % extendList(123, []))
print('list3=%s' % extendList('a'))
result:
list1=[10]
list2=[123]
list3=[10, 'a']
17.用你的理解解释一下什么是可迭代对象，什么是迭代器。
可迭代对象：iterate 具有__iter__方法的对象，就是可迭代对象。
迭代器：iterator 具有__iter__方法和__next__方法的对象。
18.如何判断该对象是否是可迭代对象或者迭代器？
object = ? # object是未知对象
object_directory = dir(object)
print('iter' in object_directory) # 若返回 True 则该对象是可迭代对象
print(('next' and 'iter') in object_directory) # 若返回 True 则该对象是迭代器
19.写代码：用while循环模拟for内部的循环机制（面试题）。
iterator = iter(iterate_object)
while 1:
try:
i = next(iterator)
except StopIteration:
break
20.写函数，传入n个数，返回字典
{‘max’:最大值,’min’:最小值}
例如: min_max(2, 5, 7, 8, 4)
返回: {‘max’:8,’min’:2}(此题用到max(), min()内置函数)
def min_max(*args):
return {'max': max(args), 'min': min(args)}
21.写函数，传入一个参数n，返回n的阶乘
例如: cal(7)
计算7654321
def cal(integer):
re = 1
for i in range(1, integer+1):
re *= i
return re
22.写函数，返回一个扑克牌列表，里面有52项，每一项是一个元组(选做题)
例如：[(‘红心’，2), (‘草花’，2), …(‘黑桃’，‘A’)]
def poker_list():
list = []
type1_list = ['红心', '草花', '黑桃', '红桃']
type2_list = ['2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'J', 'A']
for type1 in type1_list:
for type2 in type2_list:
list.append((type1, type2))
return list
23.写代码完成99乘法表.(选做题，面试题)
1 * 1 = 1
2 * 1 = 2 2 * 2 = 4
3 * 1 = 3 3 * 2 = 6 3 * 3 = 9
......
9 * 1 = 9 9 * 2 = 18 9 * 3 = 27 9 * 4 = 36 9 * 5 = 45 9 * 6 = 54 9 * 7 = 63 9 * 8 = 72 9 * 9 = 81
for int_1 in range(1, 10):
for int_2 in range(1, int_1 + 1):
print(f'{int_1} * {int_2} = {int_1 * int_2}', end=' ')
print('')