111-08-27 Python入門實作班上課記錄

tags: python

寫一程式，讓使用者輸入兩個數字，相乘後在畫面上顯示結果

• 輸入兩個數字
• 相乘
• 顯示結果

方法一

num1 = int(   input('請輸入數字1:')   )
num2 = int(   input('請輸入數字2:')   )

s = num1 * num2

print('相乘後為:', s)

方法二

def mux(a, b):
    return a * b

num1 = int(   input('請輸入數字1:')   )
num2 = int(   input('請輸入數字2:')   )

s = mux(num1, num2)

print('相乘後為:', s)

方法三

def mux():
   num1 = int(   input('請輸入數字1:')   )
   num2 = int(   input('請輸入數字2:')   )
    
   return num1 * num2

s = mux()

print('相乘後為:', s)

方法四

def mux():
    num1 = int(input('請輸入數字1:'))
    num2 = int(input('請輸入數字2:'))

    s = num1 * num2

    print('相乘的結果為:', s)

mux()

方法五

def user_input():
    num1 = int(   input('請輸入數字1:')   )
    num2 = int(   input('請輸入數字2:')   )

    return num1, num2

def mux(a, b):
    return a * b

def show_result(prefix, val):
    print(prefix, val)

n1, n2 = user_input()
s = mux(n1, n2)
show_result('相乘的結果為:', s)

預設參數

# 預設參數
def show_me_the_money(name = 'Unknown', m = 0):  # 預設參數的參數右邊不可以有沒有預設參數的參數
    print(name, 'have', m, 'dollar')

show_me_the_money(3)

指定參數

def test_parameter(a, b):
    print('a=', a)
    print('b=', b)

test_parameter(b=9, a=100)

檔案操作

寫入檔案

with open('abc.txt', 'w') as my_file:
    my_file.write('Aaron')

寫入多行

with open('abc.csv', 'w') as my_file:
    my_file.write('Aaron, Andy, Abner, Amber\n')
    my_file.write('Aaron, Andy, Abner, Amber\n')
    my_file.write('Aaron, Andy, Abner, Amber\n')
    my_file.write('Aaron, Andy, Abner, Amber\n')
    my_file.write('Aaron, Andy, Abner, Amber')

字串解析

with open('abc.csv', 'r') as my_file:
    content = my_file.read()
    # print(content)

    rows = content.split('\n')

    print(rows[0])
    print(rows[1])
    print(rows[2])
    print(rows[3])
    print(rows[4])

    columns = rows[0].split(', ')
    print(columns[0] + '123')
    print(columns[1] + '123')
    print(columns[2] + '123')
    print(columns[3] + '123')

猜數字遊戲

# 猜數字遊戲
import random

a = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
random.shuffle(a)
answer = a[0] + a[1] + a[2] + a[3]   # 答案
print('答案:', answer)

guess_count = 0  # 猜了幾次

while True:
    user = input('請猜4個數字(0~9之間不可重複數字):')
    guess_count += 1 # 次數加一

    if len(set(user)) < 4:
        print('不可以有重複的數字, 已猜了', guess_count, '次')
        continue

    if user == answer:
        break

    # 比較
    how_many_A = 0
    how_many_B = 0

    # 算出有幾個A
    if answer[0] == user[0]:
        how_many_A += 1

    if answer[1] == user[1]:
        how_many_A += 1

    if answer[2] == user[2]:
        how_many_A += 1
    
    if answer[3] == user[3]:
        how_many_A += 1

    if user[0] in answer and user[0] != answer[0]:
        how_many_B += 1

    if user[1] in answer and user[1] != answer[1]:
        how_many_B += 1

    if user[2] in answer and user[2] != answer[2]:
        how_many_B += 1

    if user[3] in answer and user[3] != answer[3]:
        how_many_B += 1

    print(how_many_A, 'A', how_many_B, 'B', sep='', end='')
    print(', 你已經猜了', guess_count, '次了')

print('猜對了，總共了猜了', guess_count, '次')

for-in

a = [3, 4, 5, 6]
tmp = []

count = 0
for v in a:
    tmp.append(v ** 2)
    count += 1
    print('現在是第', count, '次', v)

a = tmp
print(a)

把list裡面的偶數挑出來存成一個新的list, 然後顯示出來

a = [99, 88, 77, 66, 55, 44, 33]
b = []

for v in a:
    if v % 2 == 0:
        b.append(v)

print(b)

print([v for v in [99, 88, 77, 66, 55, 44, 33] if v % 2 == 0])

將list加總

a = [ 1, 3, 5, 7]
tmp = []

for v in a:
    tmp.append(v ** 2)

a = tmp
print(a)

# for comperhension寫法
print([v ** 2 for v in [ 1, 3, 5, 7]])

過濾csv資料

with open('abc.csv', 'r', encoding='utf-8') as my_file:
    for line in my_file:
        col = line.split(', ')
        
        if col[0] == 'Abner':
           print('Aber的電話為:', col[1])

with open('Fstdata.csv', 'r', encoding='utf-8') as my_file:
    for line in my_file:
        col = line.split(',')
        
        if '人生' in col[1]:
           print(col[1], '快篩剩餘:', col[7])