int_n = "7347"
print(eval(int_n), type(eval(int_n)))
float_n = "3.15"
print(eval(float_n), type(eval(float_n)))
complex_nu = "2+3j"
print(eval(complex_nu), type(eval(complex_nu)))
'''
run:
7347 <class 'int'>
3.15 <class 'float'>
(2+3j) <class 'complex'>
'''