dataframe in () condition code example
Example 1: or condition in pandas
df2 = df[(df.a != -1) | (df.b != -1)]
Example 2: if condition dataframe python
df.loc[df['age1'] - df['age2'] > 0, 'diff'] = df['age1'] - df['age2']
df2 = df[(df.a != -1) | (df.b != -1)]
df.loc[df['age1'] - df['age2'] > 0, 'diff'] = df['age1'] - df['age2']