Python Pandas Series.append()

Pandas系列是一个带有轴标签的一维ndarray。标签不需要是唯一的，但必须是一个可散列的类型。该对象支持基于整数和标签的索引，并提供了大量的方法来执行涉及索引的操作。

Pandas Series.append()函数用于连接两个或多个系列对象。

语法: Series.append(to_append, ignore_index=False, verify_integrity=False)

参数:
to_append :系列或系列的列表/tuple。
ignore_index : 如果为真，不使用索引标签。
verify_integrity : 如果为真，在创建有重复的索引时引发异常。

返回 : 附注：系列

示例#1：使用Series.append()函数将传递的系列对象追加到该系列对象的末尾。

# importing pandas as pd
import pandas as pd
  
# Creating the first Series
sr1 = pd.Series(['New York', 'Chicago', 'Toronto', 'Lisbon', 'Rio'])
  
# Create the first Index
index_1 = ['City 1', 'City 2', 'City 3', 'City 4', 'City 5'] 
  
# set the index of first series
sr1.index = index_1
  
# Creating the second Series
sr2 = pd.Series(['Chicage', 'Shanghai', 'Beijing', 'Jakarta', 'Seoul'])
  
# Create the second Index
index_2 = ['City 6', 'City 7', 'City 8', 'City 9', 'City 10'] 
  
# set the index of second series
sr2.index = index_2
  
# Print the first series
print(sr1)
  
# Print the second series
print(sr2)

输出 :

City 1    New York
City 2     Chicago
City 3     Toronto
City 4      Lisbon
City 5         Rio
dtype: object

City 6      Chicage
City 7     Shanghai
City 8      Beijing
City 9      Jakarta
City 10       Seoul
dtype: object

现在我们将使用Series.append()函数将sr2追加到sr1系列的末尾。

# append sr2 at the end of sr1
result = sr1.append(sr2)
  
# Print the result
print(result)

输出 :

City 1     New York
City 2      Chicago
City 3      Toronto
City 4       Lisbon
City 5          Rio
City 6      Chicage
City 7     Shanghai
City 8      Beijing
City 9      Jakarta
City 10       Seoul
dtype: object

正如我们在输出中看到的，Series.append()函数已经成功地将sr2对象附加到sr1对象的末尾。

示例#2：使用Series.append()函数将传递的系列对象追加到这个系列对象的末尾。忽略这两个系列对象的原始索引。

# importing pandas as pd
import pandas as pd
  
# Creating the first Series
sr1 = pd.Series(['New York', 'Chicago', 'Toronto', 'Lisbon', 'Rio'])
  
# Create the first Index
index_1 = ['City 1', 'City 2', 'City 3', 'City 4', 'City 5'] 
  
# set the index of first series
sr1.index = index_1
  
# Creating the second Series
sr2 = pd.Series(['Chicage', 'Shanghai', 'Beijing', 'Jakarta', 'Seoul'])
  
# Create the second Index
index_2 = ['City 6', 'City 7', 'City 8', 'City 9', 'City 10'] 
  
# set the index of second series
sr2.index = index_2
  
# Print the first series
print(sr1)
  
# Print the second series
print(sr2)

输出 :

City 1    New York
City 2     Chicago
City 3     Toronto
City 4      Lisbon
City 5         Rio
dtype: object

City 6      Chicage
City 7     Shanghai
City 8      Beijing
City 9      Jakarta
City 10       Seoul
dtype: object

现在我们将使用Series.append()函数将sr2追加到sr1系列的末尾。我们将忽略给定系列对象的索引。

# append sr2 at the end of sr1
# ignore the index
result = sr1.append(sr2, ignore_index = True)
  
# Print the result
print(result)

输出 :

0    New York
1     Chicago
2     Toronto
3      Lisbon
4         Rio
5     Chicage
6    Shanghai
7     Beijing
8     Jakarta
9       Seoul
dtype: object