Insert Row in Python Pandas DataFrame

Question

(I´m new to python, sorry for any mistakes I make, I hope you can understand me)

I have searched for a method to insert a Row into a Pandas DataFrame in Python, and

Answer 1

With a small DataFrame, if you want to insert a line, at position 1:

df = pd.DataFrame({'a':[0,1],'b':[2,3]})

df1 = pd.DataFrame([4,5]).T  

pd.concat([df[:1], df1.rename(columns=dict(zip(df1.columns,df.columns))), df[1:]])

#Out[46]: 
#   a  b
#0  0  2
#0  4  5
#1  1  3