How to use cse insensitive condition in lambda expresion

[scidam]

df['value']=df.loc[df['Status'].str.contains('pass', case=False), 'value'] = 0

Doing so you encounter with specificity of chained assignment in Python. This line is equivalent to

temporary = 0
df['value'] = temporary
df.loc[...] = temporary

So, you will get a column of zeros. df.loc[..., 'value'] automatically creates a column if it does not exist, you don't need to create it, e.g. by df['value'] or something else.