what is wrong with this Python code?

import math def projectileMotion(v, a, h, g = 9.8): '''  According to the question  We need to calculate a list of (x, y) projectile motion data points  where:  x-axis is distance (m) # In while loop  y-axis is height (m) # In while loop  v is initial velocity of the projectile (ms-1)  a is the firing angle with repsect to ground (radians)  h is starting height with respect to ground (m)  g is the gravity (ms-2)  '''   list_xy = [] t = 0.0 while True: # now calculate the height y  y = float(h) + (float(t) * float(v) * float(math.sin(a))) - float((g) * float(t * t))/2 # projectile has hit ground level  if y < 0: break  # calculate the distance x  x = float(v) * float(math.cos(a)) * float(t) # append the (x, y) tuple to the list  list_xy.append((x, y)) # time in increments of 0.1 seconds  t += 0.1 return list_xy # Input here d = input('Enter angle in degrees : ') a = math.radians(d) # radians v = input('Enter the initial velocity : ') h = input('Enter the initial Height : ') # Function Call data = projectileMotion(v, a, h) # Output Calculate  # Height max h_max = max(data, key = lambda q: q[1]) xh, yh = h_max print('''  Projectile Motion ... Using a firing angle of {} (degrees) and a initial velocity of {} (ms-1) the maximum height is {:0.3f} (m) at a distance of {:0.3f} (m),'''.format(d, v, yh, xh)) # Range Max ... rangeMax = max(data)[0] print("The maximum distance is {:0.3f} (m).".format(rangeMax))