Jupyter Notebook 中的代码未在 Python 2.7.18 中运行

Question

I wrote a function that was running on the Jupyter Notebook. Now I want to run the same code in Python 2.7.18 but getting a Syntax error in "" part..

import datetime
now = datetime.datetime.now()
i = now.year
j = now.month
k = now.day
def concat(i, j):
    return eval(f"{i}{j}{k}")

Answer 1

Use format alternative instead f-string s working in python 3.6+ :

def concat(i, j):
    return eval("{}{}{}".format(i, j, k))

Answer 2

You're using f-strings here in python2, but this feature was introduced in python3.6
return eval(f"{i}{j}{k}")

You can format the output normally, or you can use the f-string emulator package for python 2: https://pypi.org/project/fstrings/

Answer 3

f string only runs on Python 3.6+. If you really need to run on Python 2.7.18 maybe you need to change your string use .format or using the % operator

instead of

eval(f"{i}{j}{k}")

use

eval("{0}{1}{2}".format(i,j,k))

or the oldest

eval("%s %s %s" % (i, j ,k)")