[英]Remove first 3 characters in string using a condition statement
Can anyone Kindly help please? 任何人都可以帮忙吗? I'm trying to remove three of the first characters within the string using the statement:
我正在尝试使用以下语句删除字符串中的前三个字符:
Data['COUNTRY_CODE'] = Data['COUNTRY1'].str[3:]
This will create a new column after removing the first three values of the string. 删除字符串的前三个值后,将创建一个新列。 However, I do not want this to be applied to all of the values within the same column so was hoping there would be a way to use a conditional statement such as 'Where' in order to only change the desired strings?
但是,我不希望将此方法应用于同一列中的所有值,因此希望有一种方法可以使用条件语句(例如“ Where”)来仅更改所需的字符串?
I assume you are using pandas so your condition check can be like: 我假设您使用的是熊猫,所以您的状况检查可以像这样:
condition_mask = Data['COL_YOU_WANT_TO_CHECK'] == 'SOME CONDITION'
Your new column can be created as: 您的新列可以创建为:
# Assuming you want the first 3 chars as COUNTRY_CODE
Data.loc[condition_mask, 'COUNTRY_CODE'] = Data['COUNTRY1'].str[:3]
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