Python str.match不完全匹配，因为没有考虑后面的字符

我有一个CSV文件：

State,  Region                  
AK,     Pacific Non Continuous
HI,     Pacific Non Continuous 
AL,     East South Central  
AZ,     Mountain                
CA,     Pacific                
OR,     Pacific                

当我跑步时：

df = pd.read_csv('C:...\input.csv')

df['SuperRegion'] = pd.np.where(df.Region.str.match("New England|Middle Atlantic|South Atlantic"), "East",
                pd.np.where(df.Region.str.match("East North Central|East South Central|West North Central|West South Central"), "Mid West",
                pd.np.where(df.Region.str.match("Mountain|Pacific"), "West", "Other")))

df.to_csv('C:...\Output.csv', index=False)

我希望前两行的

SuperRegion

值为

Other

State,  Region,                  SuperRegion
AK,     Pacific Non Continuous,  **Other**
HI,     Pacific Non Continuous,  **Other**
AL,     East South Central,      Mid West
AZ,     Mountain,                West
CA,     Pacific,                 West
OR,     Pacific,                 West

但我得到的却是：

State,  Region,                  SuperRegion
AK,     Pacific Non Continuous,  **West**
HI,     Pacific Non Continuous,  **West**
AL,     East South Central,      Mid West
AZ,     Mountain,                West
CA,     Pacific,                 West
OR,     Pacific,                 West

我假设当它运行时，它不会像我希望的那样区分

Pacific

和

Pacific Non-Continuous

。有什么建议吗

为什么不改变：

pd.np.where(df.Region.str.match("Mountain|Pacific"), "West", "Other")))

致：

或单独添加案例：

df['SuperRegion'] = pd.np.where(df.Region.str.match("New England|Middle Atlantic|South Atlantic"), "East",
                pd.np.where(df.Region.str.match("East North Central|East South Central|West North Central|West South Central"), "Mid West",
                pd.np.where(df.Region.str.match("Pacific Non Continuous"), "Other",
                pd.np.where(df.Region.str.match("Mountain|Pacific"), "West")))

理想的解决方案是创建一个字典，其中键作为区域，值作为超区域，并使用

df['Regions'].map(dict)

您可以使用isin（）

你得到

    State   Region                  SuperRegion
0   AK      Pacific Non Continuous  Other
1   HI      Pacific Non Continuous  Other
2   AL      East South Central      Mid West
3   AZ      Mountain                West
4   CA      Pacific                 West
5   OR      Pacific                 West

正如你上面提到的，我在比赛之前将比赛添加到，效果非常好！谢谢我很惊讶没有一个精确的匹配命令。

df['SuperRegion'] = np.where(df.Region.isin(['New England','Middle Atlantic','South Atlantic']), "East",\
np.where(df.Region.isin(["East North Central","East South Central","West North Central","West South Central"]), "Mid West",\
np.where(df.Region.isin(["Mountain","Pacific"]), "West", "Other")))

    State   Region                  SuperRegion
0   AK      Pacific Non Continuous  Other
1   HI      Pacific Non Continuous  Other
2   AL      East South Central      Mid West
3   AZ      Mountain                West
4   CA      Pacific                 West
5   OR      Pacific                 West