I have a data-frame and one of its columns are a string which separated with dash. I want to get the part before the dash. Could you help me with that?
import pandas as pd
df = pd.DataFrame()
df['a'] = [1, 2, 3, 4, 5]
df['b'] = ['C-C02','R-C05','R-C01','C-C06', 'RC-C06']
The desire output is:
You could use str.replace to remove the - and all characters after it:
df['b'] = df['b'].str.replace(r'-.*$', '', regex=True)
Output:
a b
0 1 C
1 2 R
2 3 R
3 4 C
4 5 RC
You want to split each string on the '-' character and keep the part before it:
df['c'] = [s.split('-')[0] for s in df['b']]
