a python script to calculate acceleration from time or distance when provided with any 1 missing value

acceleration.py

from math import sqrt

##  V**2 - U**2 = 2*A*X ##

## A = (v-u)/T ##

def main():

  dis = str(input('Are you working for distance or time? > '))

  v = input('Enter final velocity (m/s) > ')
  u = input('Enter initial velocity (m/s) > ')
  a = input('Enter acceleration (ms**-1) > ')
  x = input('Enter distance or time (m or s) > ')

  if dis in 'distance':
    vuax(v,u,a,x)  
    
  elif dis in 'time':
    vuat(v,u,a,x)


def vuax(v,u,a,x):
  if error_test(a,float) == False:
    print('acceleration value is ' + str( ( float(v)**2 - float(u)**2 ) / ( 2 * float(x) ) ) + 'm/s**2')
  
  elif error_test(v,float) == False:
    print('final velocity value is ' + str( sqrt( ( 2 * float(a) * float(x) ) + float(u)**2 ) ) + 'm/s')
  
  elif error_test(u,float) == False:
    print('initial velocity value is ' + str( sqrt( float(v)**2 - ( 2 * float(a) * float(x) ) ) ) + 'm/s')
    
  elif error_test(x,float) == False:
    print('distance value is ' + str( ( float(v)**2 - float(u)**2 ) / ( 2 * float(a) ) ) + 'm')


def vuat(v,u,a,t):
  try:
    if error_test(a,float) == False:
      print('acceleration value is ' + str( ( float(v) - float(u) ) / float(t) ) + 'm/s**2')
    
    elif error_test(v,float) == False:
      print('final velocity value is ' + str( ( float(a) * float(t) ) + float(u) ) + 'm/s')
    
    elif error_test(u,float) == False:
      print('initial velocity value is ' + str( float(v) - ( float(a) * float(t) ) ) + 'm/s')
       
    elif error_test(t,float) == False:
      print('time value is ' + str( ( float(v) - float(u) )/ float(a) ) + 's')
      
  except ZeroDivisionError:
    print('You entered incorrect values. Division can\'t be completed')
  except ValueError:
    print('You need to enter 3 values. If you only have 2, you can\'t calculate acceleration.')
    
def error_test(x,y):
  try:
    y(x)
    return True
  except:
    return False
  
main()