feat: add pandas solutions to lc problems: No.2877~2891 (doocs#1750)

* No.2877.Create a DataFrame from List
* No.2878.Get the Size of a DataFrame
* No.2879.Display the First Three Rows
* No.2880.Select Data
* No.2881.Create a New Column
* No.2882.Drop Duplicate Rows
* No.2883.Drop Missing Data
* No.2884.Modify Columns
* No.2885.Rename Columns
* No.2886.Change Data Type
* No.2887.Fill Missing Data
* No.2888.Reshape Data Concatenate
* No.2889.Reshape Data Pivot
* No.2890.Reshape Data Melt
* No.2891.Method Chaining

Author: yanglbme

solution/2800-2899/2877.Create a DataFrame from List/README.md

@@ -48,7 +48,11 @@ A DataFrame was created on top of student_data, with two columns named <code>stu
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```python
+import pandas as pd
 
+
+def createDataframe(student_data: List[List[int]]) -> pd.DataFrame:
+    return pd.DataFrame(student_data, columns=['student_id', 'age'])
 ```
 
 ### **...**

solution/2800-2899/2877.Create a DataFrame from List/README_EN.md

@@ -42,7 +42,11 @@ A DataFrame was created on top of student_data, with two columns named <code>stu
 ### **Pandas**
 
 ```python
+import pandas as pd
 
+
+def createDataframe(student_data: List[List[int]]) -> pd.DataFrame:
+    return pd.DataFrame(student_data, columns=['student_id', 'age'])
 ```
 
 ### **...**

solution/2800-2899/2877.Create a DataFrame from List/Solution.py

@@ -0,0 +1,5 @@
+import pandas as pd
+
+
+def createDataframe(student_data: List[List[int]]) -> pd.DataFrame:
+    return pd.DataFrame(student_data, columns=['student_id', 'age'])

solution/2800-2899/2878.Get the Size of a DataFrame/README.md

@@ -63,7 +63,11 @@ This DataFrame contains 10 rows and 5 columns.
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```python
+import pandas as pd
 
+
+def getDataframeSize(players: pd.DataFrame) -> List[int]:
+    return list(players.shape)
 ```
 
 ### **...**

solution/2800-2899/2878.Get the Size of a DataFrame/README_EN.md

@@ -57,7 +57,11 @@ This DataFrame contains 10 rows and 5 columns.
 ### **Pandas**
 
 ```python
+import pandas as pd
 
+
+def getDataframeSize(players: pd.DataFrame) -> List[int]:
+    return list(players.shape)
 ```
 
 ### **...**

solution/2800-2899/2878.Get the Size of a DataFrame/Solution.py

@@ -0,0 +1,5 @@
+import pandas as pd
+
+
+def getDataframeSize(players: pd.DataFrame) -> List[int]:
+    return list(players.shape)

solution/2800-2899/2879.Display the First Three Rows/README.md

@@ -58,7 +58,11 @@ Only the first 3 rows are displayed.</pre>
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```python
+import pandas as pd
 
+
+def selectFirstRows(employees: pd.DataFrame) -> pd.DataFrame:
+    return employees.head(3)
 ```
 
 ### **...**

solution/2800-2899/2879.Display the First Three Rows/README_EN.md

@@ -52,7 +52,11 @@ Only the first 3 rows are displayed.</pre>
 ### **Pandas**
 
 ```python
+import pandas as pd
 
+
+def selectFirstRows(employees: pd.DataFrame) -> pd.DataFrame:
+    return employees.head(3)
 ```
 
 ### **...**

solution/2800-2899/2879.Display the First Three Rows/Solution.py

@@ -0,0 +1,5 @@
+import pandas as pd
+
+
+def selectFirstRows(employees: pd.DataFrame) -> pd.DataFrame:
+    return employees.head(3)

solution/2800-2899/2880.Select Data/README.md

@@ -54,7 +54,11 @@ Input:</strong>
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```python
+import pandas as pd
 
+
+def selectData(students: pd.DataFrame) -> pd.DataFrame:
+    return students[students['student_id'] == 101][['name', 'age']]
 ```
 
 ### **Java**