# Ex1

題目:
1. 我想collect data,
-- 點collect，先collect 1個

2. 者係例如a1呢個item,
-- 點search，先search 1個，再search多個
-- 考慮返回值結果作處理

3. 係1-8呢幾個xls(O_data)入面, total 有幾多件
-- 將1. 想像成一個功能，重複1. 的功能

## 檔案全部放在`o_data`文件夾中
> o_data/1.xlsx
> o_data/3.xlsx
> ...
>

# import Pandas套件、OS套件(用作判斷.xlsx)
import pandas as pd
from os import listdir
import os

# 找出目錄中全部.xlsx文件
my_path = "o_data"
loc_target = []                               # 設置空陣列loc_target用作存放.xlsx文件名

for root, dirs, files in os.walk(my_path):    # (迴圈)在my_path中找尋->會show所有文件名(files)
  for i in files:                              
    if(os.path.splitext(i)[1] == '.xlsx'):    # 在每個files中判斷副檔名是否包含.xlsx
      loc_target.append(os.path.join(root,i)) # 如果是，則在loc_target加入該文件名

# Set Target
target_no = "a0"

# 設置統計參數
target_amount = 0
target_price = 0
target_sum = 0

# 讀取所有.xlsx文件，分別進行累加
for loc in loc_target:
  df = pd.read_excel(loc,skiprows=7,usecols="B:F")

  # Search Target
  target = df[df["編號"]==target_no].reset_index()
  result_length = len(target.index)

  for i in range(0,result_length):
    target_amount = target_amount + target.at[i,"數量"]
    target_price = target_price + target.at[i,"單價"]
    target_sum = target_sum + target.at[i,"金額"]
    
# Show Result
print(target_amount)
print(target_price)
print(target_sum)