函数参数补充、名称空间与作用域、global与nonlocal 练习

# 作业要求：下述所有代码画图以及分析代码执行流程
# 1、以定义阶段为准，先画出名称空间的嵌套关系图
# 2、然后找到调用函数的位置，写出函数调用时代码的执行过程，涉及到名字的查找时，参照1中画好
#    的嵌套图，标明查找顺序，一层一层直到找到位置

# ===================题目一===================
input=333
def func():
    input=444
func()
print(input)

# ===================题目二===================
def func():
    print(x)
x=111

func()

# ===================题目三===================
x=1
def func():
   print(x)


def foo():
    x=222
    func()

foo()

# ===================题目四===================
input=111
def f1():
    def f2():
        # input=333
        print(input)
    input=222

    f2()

f1()

# ===================题目五===================
x=111
def func():
    print(x) #
    x=222

func()

# ===================题目六===================
x=111

def foo():
    print(x,)

def bar():
    print(x)

foo()
bar()

# ===================题目七===================
x=1
def func2():
    func1()

x=2
def func1():
    print(x)

x=3

func2()

# ===================题目八===================
# 1、如下全局变量记录了当前登录用户，编写登录功能，一旦用户登录成功，则将全局变量赋值为当前登录的用户名
# login_user=None
'''
login_user=None
def users(file,user_input,pas):
    with open(file, mode='rt', encoding='utf-8') as f1:
        for line in f1:
            user, word = line.strip().split(':')
            if user_input == user and pas == word:
                print('登录成功!')
                global login_user
                login_user=user_input
            else:
                print('登录失败')

users('dbs.txt','tank','123')
print(login_user)
'''
# 2、针对之前编写的查询余额的功能，添加额外的逻辑：如果用户没有登录，则先执行登录功能
'''
login_user=None
msg = {'0':'退出','1': '充值','2': '转账','3': '提现','4':'查询余额'}
dic={}
tag = True
while tag:
    with open('db.txt', mode='rt', encoding='utf-8') as f2:
        for line2 in f2:
            user2, money = line2.strip().split(':')
            dic[user2] = int(money)
    msg = "'0':'退出','1': '充值','2': '转账','3': '提现','4':'查询余额'"
    print(msg)
    cmd = input('请输入命令编号>>: ').strip()
    if not cmd.isdigit():
        print('必须输入命令编号的数字')
        continue
    elif cmd not in msg:
        print('输入的命令不存在')
        continue
    else:
        if cmd == '4':
            if login_user not in dic:
                user_input=input('请输入用户名称：')
                pas=input('请输入用户密码：')
                with open('dbs.txt', mode='rt', encoding='utf-8') as f1:
                    for line in f1:
                        user, word = line.strip().split(':')
                        if user_input == user and pas == word:
                            user2 = user_input
                            money = dic[user2]
                            print(money)
                        else:
                            print('登录失败')
            else:
                user2 = login_user
                money = dic[user2]
                print(money)
'''