python通用編程二階段：模塊對象

一、薪資文件
內容如下，標題爲：姓名，性別，年紀，薪資

albert male 18 3000
james male 38 30000
林玲 female 28 20000
結衣 female 28 10000

要求從文件中取出每一條記錄放入列表中，列表中的每個元素都是如下格式：

{'name':'albert','sex':'male','age:18,'salary':3000}

f = open('info.txt', 'r')
list_info = []
for line in f:
    data_info = line.split(' ')
    name = data_info[0]
    sex = data_info[1]
    age = data_info[2]
    salary = data_info[3]
    people = {'name': name, 'sex': sex, 'age': int(age), 'salary': int(salary)}
    list_info.append(people)
f.close()

print(list_info)

二、根據題一，求薪資最高

# 方式一 ：手寫算法
def get_the_richest(list1):
    richest = list1[0]
    for i in range(len(list1)):
        if list1[i]['salary'] > richest['salary']:
            richest = list1[i]
    return richest

# 方式二：使用內置函數max與lambda組合
print('內置函數', max(list_info, key=lambda x: x['salary']))

三、將名字首字母改爲大寫

def change_capitalize(list1):
    for i in range(len(list1)):
        if 'a' <= list1[i]['name'][0] <= 'z':
            list1[i]['name'] = list1[i]['name'].capitalize()
    return list1


res1 = change_capitalize(list_info)
print(res1)

# need to create redundant joint
res2 = map(lambda x: x['name'].capitalize(), list_info)
print(list(res2))

四、過濾掉以a開頭的名字信息

def filter_a(list1):
    list2 = []
    for i in range(len(list1)):
        if list1[i]['name'][0] != 'a':
            list2.append(list1[i])
    return list2

print(list(filter(lambda x: not x['name'].startswith('a'), list_info)))

五、用遞歸打印斐波那契數列

def Fibonacci(n):
    if n < 1:
        return
    elif n == 1:
        return 1
    elif n == 2:
        return 1
    else:
        return Fibonacci(n - 1) + Fibonacci(n - 2)


for i in range(1, 20):
    print(Fibonacci(i))

六、使用random模塊，隨機生成8位驗證碼，隨機大小寫字母和數字

import random
def get_verification():
    verification_code = ''
    for i in range(8):
        alpha1 = chr(random.randint(65, 90))
        alpha2 = chr(random.randint(97, 122))
        number = random.randint(0, 9)
        verification_code += random.choice([alpha1, alpha2, str(number)])
    return verification_code


print((get_verification()))

七、寫一個模擬撞庫的程序，假如密碼都是用md5加密的，撞庫就是用多個猜測的密碼嘗試比對正確的密碼，比對過程一定是用md5來進行的。

import random
import hashlib


def get_password_violently():
    while True:
        
        password = ''

        # imagine password is formed by 4 numbers or alphas
        for i in range(4):
            random_alpha = chr(random.randint(65, 90))
            random_number = random.randint(0, 9)
            password += random.choice([random_alpha, str(random_number)])

        # md5 processing...
        m = hashlib.md5()
        m.update(password.encode('utf-8'))
        md5_password = m.hexdigest()

        all_alpha_number = list(map(lambda x: chr(x), range(48, 122)))

        # simulate user input password
        for a in all_alpha_number:
            for b in all_alpha_number:
                for c in all_alpha_number:
                    for d in all_alpha_number:
                        input_password = a + b + c + d

                        m = hashlib.md5()
                        m.update(input_password.encode('utf-8'))
                        input_md5_password = m.hexdigest()

                        if input_md5_password == md5_password:
                            return password


res = get_password_violently()
print("user's password", res)

八、使用re模塊寫一個驗證手機號碼是否有效的程序
首先準備一個通訊錄文件，內容爲：

姓名 地區 身高 體重 電話
況詠蜜 北京 171 48 11151054608
王欣妍 上海 169 46 137234523
…

import re


def get_model_phone(file):
    invalid_data = {}
    with open(file, 'r', encoding='utf-8') as f:
        for line in f:
            model_data_list = line.split()
            name = model_data_list[0]
            phone = model_data_list[-1]
            valid_phone = re.findall('13\d\d\d\d\d\d\d\d\d', phone)
            if valid_phone:
                invalid_data[name] = valid_phone[0]
        return invalid_data


res = get_model_phone('info2.txt')
print(res)