如何通过Python编程实例提升编程技能？

电子产品（手机）销售分析

1、不同内存下的销量

代码片段

     nei_cun = color_size["Number_GB"].value_counts().reset_index()
     nei_cun.columns = ["Number_of_GB", "Count"]  # 重命名
     nei_cun["Number_of_GB"] = nei_cun["Number_of_GB"].apply(lambda x: str(x) + "GB")
     fig = px.pie(nei_cun, values="Count", names="Number_of_GB")
     fig.show()

2、不同闪存Ram下的价格分布

代码片段

     fig = px.box(df, y="Sale Price", color="Ram")
     fig.update_layout(height=600, width=800, showlegend=False)
     fig.update_layout(title={"text": '不同<b>闪存</b>下的价格分布', "y": 0.96, "x": 0.5, "xanchor": "center", "yanchor": "top"}, xaxis_tickfont_size=12, yaxis=dict(title='Distribution', titlefont_size=16, tickfont_size=12), legend=dict(x=0, y=1, bgcolor='rgba(255, 255, 255, 0)', bordercolor='rgba(2, 255, 255, 0)'))
     fig.show()

3、不同店铺下的点评数量对比

代码片段

     fig = px.bar(df2_top3, x="行政区", y="店铺数量", color="类别", text="店铺数量")
     fig.update_layout(title="不同行政区下不同类别的店铺数量对比")
     fig.show()

4、基于RFM模型的用户画像

代码片段

     data['Recency'] = (datetime.now().date() data['PurchaseDate'].dt.date).dt.days
     frequency_data = data.groupby('CustomerID')['OrderID'].count().reset_index()
     frequency_data.rename(columns={'OrderID': 'Frequency'}, inplace=True)
     monetary_data = data.groupby('CustomerID')['TransactionAmount'].sum().reset_index()
     monetary_data.rename(columns={'TransactionAmount': 'MonetaryValue'}, inplace=True)

Python绘图

1、Matplotlib的3D图形绘制

代码片段

     plt.style.use('fivethirtyeight')
     fig = plt.figure(figsize=(8, 6))
     ax = fig.gca(projection='3d')
     z = np.linspace(0, 20, 1000)
     x = np.sin(z)
     y = np.cos(z)
     surf = ax.plot3D(x, y, z)
     z = 15 * np.random.random(200)
     x = np.sin(z) + 0.1 * np.random.randn(200)
     y = np.cos(z) + 0.1 * np.random.randn(200)
     ax.scatter3D(x, y, z, c=z, cmap='Greens')
     plt.show()

2、Python实战项目

猜单词游戏

     lives = 3
     words = ['pizza', 'fairy', 'teeth', 'shirt', 'otter', 'plane']
     secret_word = random.choice(words)
     clue = list('?????')
     heart_symbol = u'u2764'
     guessed_word_correctly = False
     def update_clue(guessed_letter, secret_word, clue):
         index = 0
         while index < len(secret_word):
             if guessed_letter == secret_word[index]:
                 clue[index] = guessed_letter
             index += 1
     while lives > 0:
         print(clue)
         print('剩余生命次数: ' + heart_symbol * lives)
         guess = input('猜测字母或者是整个单词: ')
         if guess == secret_word:
             guessed_word_correctly = True
             break
         if guess in secret_word:
             update_clue(guess, secret_word, clue)
         else:
             print('错误，你丢了一条命
')
             lives -= 1
     if guessed_word_correctly:
         print('你赢了! 秘密单词是 ' + secret_word)
     else:
         print('你输了! 秘密单词是 ' + secret_word)

闹钟

     from datetime import datetime
     from playsound import playsound
     alarm_time = input("请输入闹钟时间, 示例: 09:50:00 am
")
     alarm_hour = alarm_time[0:2]
     alarm_minute = alarm_time[3:5]
     alarm_seconds = alarm_time[6:8]
     alarm_period = alarm_time[9:11].upper()
     print("完成闹钟设置..")
     while True:
         now = datetime.now()
         current_hour = now.strftime("%I")
         current_minute = now.strftime("%M")
         current_seconds = now.strftime("%S")
         current_period = now.strftime("%p")
         if alarm_period == current_period:
             if alarm_hour == current_hour:
                 if alarm_minute == current_minute:
                     if alarm_seconds == current_seconds:
                         print("起来啦!")
                         playsound('audio.mp3')
                         break

骰子模拟器

     import random
     min_val = 1
     max_val = 6
     roll_again = "yes"
     while roll_again == "yes" or roll_again == "y":
         print("开始掷骰子")
         print("骰子数值是 :")
         print(random.randint(min_val, max_val))
         roll_again = input("是否继续掷骰子?(是的话, 输入yes或者y)")

二维码

     import pyqrcode
     s = "https://www.baidu.com"
     url = pyqrcode.create(s)
     url.svg("baidu.svg", scale=8)

语言检测

     from langdetect import detect
     text = input("输入信息: ")
     print(detect(text))

加密和解密

     # 示例代码略，涉及GUI应用程序开发和密码术实现，较为复杂。

这些实例可以帮助初学者快速掌握Python的基础语法和高级应用，同时通过实战练习提升编程技能。

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