a = ["1", "2", "привет", "3", "привет", "123", "1e2", "-9", "-3007", "-9.7"]
a = [int(x) if x.isdigit() or x[0]=='-' and x[1:].isdigit() else x for x in a]
print(a)
YSA9IFsiMSIsICIyIiwgItC/0YDQuNCy0LXRgiIsICIzIiwgItC/0YDQuNCy0LXRgiIsICIxMjMiLCAiMWUyIiwgIi05IiwgIi0zMDA3IiwgIi05LjciXQphID0gW2ludCh4KSBpZiB4LmlzZGlnaXQoKSBvciB4WzBdPT0nLScgYW5kIHhbMTpdLmlzZGlnaXQoKSBlbHNlIHggZm9yIHggaW4gYV0KcHJpbnQoYSk=
[1, 2, 'привет', 3, 'привет', 123, '1e2', -9, -3007, '-9.7']