Purely for fun...

from math import pi, cos, degrees, radians def birfday(age, deg_lat, length="s"): latitude = radians(deg_lat) #need to convert to rads earth_radius = 6371 #km year = 365.24 earthsun_dist = 146000000 #km orbit = pi*(earthsun_dist*2) lat_rad = (earth_radius*2)*cos(latitude) diam = (pi*lat_rad) #Diameter of earth at latitude (perpenducular to the axis of rotation. year_trav = diam*year #Total aproximate distance moved in one year by a person standing on earth staying roughly in the same place -> #distance moved by earth around sun x distance moved by rotation of earth one_year_dist = orbit + year_trav # distance travelled by [age] years: end_dist = int(age*one_year_dist) lightyr_comp = end_dist/9460730472580.8 # Messages if length == "s": #short message out = [("You have travelled somewhere in the region of %dkm since you were born!" % (end_dist)), ("That's about %f light years" % (lightyr_comp))] else: #verbose explaination out = [ "Given that the mean radius of the earth is 6,371km:", ("The circumference of the earth at your latitude (%f) = pi*6371*2*(cos(%f))" % (deg_lat, deg_lat)), ("Thus you would travel %dkm per day." % (lat_rad)), ("In one year you would travel 365.24*%dkm ~= %dkm on the face of the planet, this doesn't account for the earth's rotation though."% (lat_rad, int(year_trav))), ("Since the earth is around 146,000,000km from the sun, a single, averaged orbit ~= pi*146000000*2 or 917345054.8km"), ("Multiplying distance travelled on the earth's surface by the distance travelled in an orbit around the sun = %dkm."% (int(one_year_dist))), "Finally, we must account for your age.", ("You're currently %d years old so %d times the distance travelled in one year is the actual distance you've travelled." % (age, age)), ("You've travelled %dkm since you were born!" % (end_dist)), "The next time someone tells you that you're going no-where in life tell them how wrong they are..." ] return out if __name__ == "__main__": age = 25 deg_lat = 54.4 length = "v" out = birfday(age, deg_lat, length) for line in out: print(line) out = birfday(age, deg_lat, "s") for line in out: print(line)

if __name__ == "__main__": age = 25 deg_lat = 54.4