<stdout 1>.py

import pandas as pd

x = pd.DataFrame()

<stdout 2>.py

def pasted_function() -> None:
    print("Hello world!")

codewriter.py

from codewriter import Code, Import, Variable

code = Code()
pd = Import("pandas", alias="pd")
x = Variable("x")
x.value = pd.DataFrame()
code.write(x)
print(code)

#########################
code = Code()

def pasted_function() -> None:
    print("Hello world!")

code.paste(pasted_function)
print(code)