from datetime import datetime

number = 42
pi = 3.1415
text = "answer"
now = datetime.now()

# *** in version 3.8: ***
print('in version 3.8:')
print(f'{number=}')
print(f'{pi  =  }')
print(f'{text = }')
print(f'{now = !s}')

print()
# *** before: ***
print('before:')
print(f'number={number}')
print(f'pi  =  {pi}')
print(f'text = {text}')
print(f'now = {now}')