dataframe locate value code example
Example 1: only keep rows of a dataframe based on a column value
df.loc[df['column_name'] == some_value]
Example 2: return rows based on column
df.loc[~df['column_name'].isin(some_values)]
df.loc[df['column_name'] == some_value]
df.loc[~df['column_name'].isin(some_values)]