Python|熊猫系列. append()
原文:https://www.geeksforgeeks.org/python-pandas-series-append/
熊猫系列是带有轴标签的一维数组。标签不必是唯一的，但必须是可散列的类型。该对象支持基于整数和基于标签的索引，并提供了一系列方法来执行涉及索引的操作。
熊猫 **Series.append()**功能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: 至 _ 追加:系列或系列的列表/元组 忽略 _ 索引:如果为真，则不要使用索引标签。 验证 _ 完整性:如果为真，则在创建重复索引时引发异常
返回:附加:系列
示例#1: 使用Series.append()函数将传递的序列对象追加到该序列对象的末尾。
# 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
现在我们使用Series.append()函数在 sr1 系列的末尾追加 sr2。
# 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那样，Series.append()函数已经成功地在 sr1 对象的末尾追加了 sr2 对象。
示例 2: 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。忽略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
现在我们使用Series.append()函数在 sr1 系列的末尾追加 sr2。我们将忽略给定序列对象的索引。
# 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
正如我们在输出中看到的那样，Series.append()函数已经成功地在 sr1 对象的末尾追加了 sr2 对象，并且它还忽略了索引。
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