Pandas 系列是带有轴标签的一维ndarray。标签不必是唯一的,但必须是可哈希的类型。该对象同时支持基于整数和基于标签的索引,并提供了许多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。
用法: Series.append(to_append, ignore_index=False, verify_integrity=False)
参数:
to_append:系列或系列列表/元组
ignore_index:如果为True,则不要使用索引标签。
verify_integrity:如果为True,则在创建具有重复项的索引时引发异常
返回:附加:系列
范例1:采用Series.append()
函数将传递的系列对象附加到此系列对象的末尾。
# 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附加到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()
函数已成功将sr2对象附加到sr1对象的末尾。
范例2:采用Series.append()
函数将传递的系列对象附加到此系列对象的末尾。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
现在我们将使用Series.append()
函数将sr2附加到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
正如我们在输出中看到的,Series.append()
函数已成功将sr2对象附加到sr1对象的末尾,并且它也忽略了索引。
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注:本文由纯净天空筛选整理自Shubham__Ranjan大神的英文原创作品 Python | Pandas Series.append()。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。