Add multiple columns to Pandas dataframe by applying a function that returns multiple values

df[['sum', 'difference']] = df.apply(
    lambda row: pd.Series(myfunc(row['a'], row['b'])), axis=1)

# The pd.Series is the key!

Bash | Print confirmation before exit

command 1
command 2
.
.
.

[ $? -eq '0' ] && echo "Job done!"
exit $?

Bash | remove a file is already exists

[ -e file ] && rm file

AWK function to add a double quote to beginning of a line

function addQuote(input) {
 return ("\"" input)
}

Pandas to_csv float_format

float_format= "%.0f"

Python read files line by line

fo = open('inputFileName', 'r')
lines = fo.readlines()
for ln in lines:
    print(ln)

To remove parenthesis and all the stuff inside:

AAV (South Africa) Volkswagen
AHT (South Africa) Toyota
AFA (South Africa) Ford
CL9 (Tunisia) Wallyscar

sed -e 's/([^()]*)//g'


AAV     Volkswagen
AHT     Toyota
AFA     Ford

CL9     Wallyscar