fix panda loc bug

data/3.python高阶/2.结构化数据分析工具Pandas/3.基本操作/loc.json

 {
-  "source": "loc.py",
-  "depends": [],
-  "exercise_id": 121,
-  "type": "code_options"
+    "author": "huanhuilong",
+    "source": "loc.md",
+    "depends": [],
+    "exercise_id": 121,
+    "type": "code_options"
 }
\ No newline at end of file

data/3.python高阶/2.结构化数据分析工具Pandas/3.基本操作/loc.md

+# pandas dataframe 3.1
+
+通过 loc 操作，过滤中间人信息，以下正确的操作是？
+
+## template
+
+```python
+import pandas as pd
+
+if __name__ == '__main__':
+    d = {
+        'name': ['Alice', 'Bob', 'Middle'],
+        'age': [10, 12, 0],
+        'send': ['在么', '你说呢？', '今晚有事']
+    }
+
+    df = pd.DataFrame(d, columns=['name', 'age', 'send'])
+
+    print("取出name不等于‘Middle'的数据")
+    alice_bob = df.loc[df['name'] != 'Middle']
+    print(alice_bob)
+```
+
+## 答案
+
+```python
+import pandas as pd
+
+if __name__ == '__main__':
+    d = {
+        'name': ['Alice', 'Bob', 'Middle'],
+        'age': [10, 12, 0],
+        'send': ['在么', '你说呢？', '今晚有事']
+    }
+
+    df = pd.DataFrame(d, columns=['name', 'age', 'send'])
+
+    print("取出name不等于‘Middle'的数据")
+    alice_bob = df.loc[df['name'] != 'Middle']
+    print(alice_bob)
+```
+
+## 选项
+
+### A
+
+```python
+import pandas as pd
+
+if __name__ == '__main__':
+    d = {
+        'name': ['Alice', 'Bob', 'Middle'],
+        'age': [10, 12, 0],
+        'send': ['在么', '你说呢？', '今晚有事']
+    }
+
+    df = pd.DataFrame(d, columns=['name', 'age', 'send'])
+
+    print("取出name不等于‘Middle'的数据")
+    alice_bob = df.loc(lambda item:item['name'] != 'Middle')
+    print(alice_bob)
+```
+
+### B
+
+```python
+import pandas as pd
+
+if __name__ == '__main__':
+    d = {
+        'name': ['Alice', 'Bob', 'Middle'],
+        'age': [10, 12, 0],
+        'send': ['在么', '你说呢？', '今晚有事']
+    }
+
+    df = pd.DataFrame(d, columns=['name', 'age', 'send'])
+
+    print("取出name不等于‘Middle'的数据")
+    alice_bob = df.loc['name'] != 'Middle'
+    print(alice_bob)
+```
+
+### C
+
+```python
+import pandas as pd
+
+if __name__ == '__main__':
+    d = {
+        'name': ['Alice', 'Bob', 'Middle'],
+        'age': [10, 12, 0],
+        'send': ['在么', '你说呢？', '今晚有事']
+    }
+
+    df = pd.DataFrame(d, columns=['name', 'age', 'send'])
+
+    print("取出name不等于‘Middle'的数据")
+    alice_bob = df.loc[df['name'] == 'Middle']
+    print(alice_bob)
+```