HuiXillya
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    # Python教學 import # import 我們在寫程式的時候常常會用到一些比較複雜的功能(或是你根本寫不出來的功能) 這時候,能引用別人預先寫好的功能將是我們的一大福音 ## 安裝套件-pip pithon 在某次版本跟新時就把pip一起給安裝了 所以我們不需要再額外下載 通常我們都是使用cmd(terminal)來下安裝指令 而想要快速的使用cmd(terminal)就必須把python給放入環境變數 [教學](https://shaochien.gitbooks.io/command-line-and-environment-variable-tutorial/content/environment-variable.html) 控制台>系統及安全性>系統>進階系統設定(在左邊)>環境變數 ![](https://i.imgur.com/iRbBBQb.png) 把python的資料夾放入環境變數 ![](https://i.imgur.com/523tCcu.png) 然後開啟cmd,使用 ```python= where python ``` 檢查路徑,這時應該會出現剛剛你設定的 接著來試試更新pip 在terminal 輸入 ```python= python -m pip install --upgrade pip ``` [pip常用指令](http://python-learnnotebook.blogspot.com/2018/10/python-pip.html) ### 範例 接下來示範如何安裝套件 首先在terminal 輸入 ```python= python -m pip install 套件名稱 ``` 而這次我們使用 matplotlib 作範例 ```python= python -m pip install matplotlib ``` ## import 接著,我們來試試範例 ```python= import matplotlib.pyplot as plt # 準備數據 x = [1,2,3,4,5,6,7] y = [6,5,4,3,2,1,0] # 開始畫圖 # 設定要畫的的x,y數據list.... plt.plot(x,y) # 設定圖的範圍, 不設的話,系統會自行決定 plt.xlim(-10,10) plt.ylim(-10,10) # 照需要寫入x 軸和y軸的 label 以及title plt.xlabel("x-axis") plt.ylabel("y-axis") plt.title("The Title") # 在這個指令之前,都還在做畫圖的動作 # 這個指令算是 "秀圖" plt.show() ``` [取自](http://onionys.blogspot.com/2012/01/python-matplotlib.html) ```python= import matplotlib.pyplot as plt ``` 這行的意思是,我們從預設路徑 找到matplotlib.pyplot 並且命名為plt ## fromwherer? ```python= import sys print(sys.path) ``` 假設你模組安裝在別的地方呢? 使用sys.path.append('你的路徑') ## excel? 表定課程要上excel 不過可能上不完 (而且mac不知道能不能示範= =) 套件:openpyxl ### 開啟工作表 ```python= #encode with 'UTF-8' import openpyxl as xl wk=xl.load_workbook('c:/Users/Hui/Desktop/New folder/EXE.xlsx') ``` ### 開啟分業 ```python= sheet_a=wk.active #目前的工作表 sheet1=wk['工作表1'] #依名稱開啟 ``` ### 開啟某一格 ```python= a1=sheet1['A1'] #依座標開啟 a1=sheet1.cell(1,1) #跟上面等價 print(a1.value) ``` ### 開新的excel ```python= wk2=xl.Workbook() sheet1=wk2['Sheet'] #依照上面類推 sheet1['A1']='test' #可以打公式 wk2.save(r'c:/Users/Hui/Desktop/New folder/wk2.xlsx') ``` 只要能開啟excel 就能為文書處理帶來無限的可能性 (真的,想想那些整天key excel key到死的上班族) 當然openpyxl還有非常多的功能,不過就等各位自己去使用了 [參考至](https://www.itread01.com/content/1528559012.html)

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