Tilde sign in python dataframe

Question

Im new to python and came across a code snippet.

df = df[~df[\'InvoiceNo\'].str.contains(\'C\')]

Would be much obliged if I could know what

Answer 1

if you want to apply it to all columns in a data frame you can use

df.any(axis=1)
df = df[~(df>0).any(axis=1)]

This checks if val > 0 in all columns of the data frame and returns a Boolean. Likewise, axis=0 is for index/row wise.