pandas数据框整个列的子字符串
it1352
帮助1人
问题说明
我有一个熊猫数据框"df".在此数据帧中，我有多个列，其中之一必须为子字符串. 可以说列名是"col". 我可以像下面那样运行"for"循环并对该列进行子串化:
I have a pandas dataframe "df". In this dataframe I have multiple columns, one of which I have to substring. Lets say the column name is "col". I can run a "for" loop like below and substring the column:
for i in range(0,len(df)):
df.iloc[i].col = df.iloc[i].col[:9]
但是我想知道，是否有一个选项，我不必使用"for"循环，而直接使用属性进行操作.我有大量的数据，如果这样做，数据将花费很长时间.
But I wanted to know, if there is an option where I don't have to use a "for" loop, and do it directly using an attribute.I have huge amount of data, and if I do this, the data will take a very long time process.
