code the following in python: below is the .txt file 1. \"P2.6.3 Your program sh

Question

code the following in python:

below is the .txt file

1. "P2.6.3 Your program should output the ESI of each body (to 4 places after the decimal) in a clean string. As a check for your work, note that the ESI of Mars is about 0.7. Note also that the .txt file used in this problem has a problematic format: columns are separated by spaces, but the entries in the first column also contains spaces! To get around this, note that once you have a line assigned to object 's,you can do something like: s -s.Istrip() # remove leading whitespace index s, find(, ,) # find the location of the first 'two spaces. obj -s[index] # call out the object name s s[index+2:] # then truncate the string to everything else

Explanation / Answer

'''

WRITTEN IN PYTHON 2.7

SORRY I DONT KNOW THE REFERENCE VALUES YOU HAVE MENTIONED THAT ARE IN TABLE 2.14

THATS WHY I HAVE USED REFERENCE VALUES MENTIONED IN INTERNET

AND I HAVE ONLY GOT 4 POPERTY'S REFERENCE AND WEIGHT EXPONENT

Planetary Properties used:

PROPERTY_NAME REFERENCE WEIGHT_i

1. RADIUS 1.0 0.57

2. DENSITY 1.0 1.07

3. ESCAPE VELOCITY 1.0 0.70

4. SURFACE_TEMP 288 5.58

NO.OF PROPERTIES (n) = 4

EVERYTHING WILL BE DONE LIKE YOU EXPLAINED

'''

import math

def calculate_esi(val,w_i,ref,n):

sub = (val-ref)/(val+ref) #IMPLEMENTING THE FORMULA GIVEN

sub = abs(sub)

sub = 1 - sub

sub = pow(sub,w_i/n)

return sub

f=open("file.txt","r") #open the file

x=f.readline() #first line contains attributes

x=f.readline() #second line contains attributes type

x=f.readline() ##third line ------------------- and we are skipping these three lines

x=f.readline() #EARTH TAKES AS REFERENCE

x=f.readline() #START OF OTHER PLANET OR OBJECT CALCULATION

w_i = [0.57 , 1.07 , 0.70 , 5.58] #weight components for properties

ref_prop = [1.0 , 1.0 ,1.0 , 288.0] #reference values according to above

rad_list = [] #list to store each planet esi according to radius

dens_list =[] #list to store each planet esi according to DENSITY

esc_vel_list = [] #list to store each planet esi according to ESCAPE_VELOCITY

surf_temp_list = [] ##list to store each planet esi according to SURFACE_TEMPRATURE

planet_esi = [] #list to store each planet esi according to PRODUCT OF EACH PALENTORY PROPERTY

n=4.0 #no of properties

while(x):

x=x.strip() #REMOVING WHITE SPACES AT EACH ENDS

ind=x.find(' ') #FINDING OBJECT NAME

obj= x[:ind]

values=[]

ind= x.find(' ',ind+1) #FINDING VALUES

while(ind!=-1):

ind1=ind+1

ind=x.find(' ',ind1)

if(ind1==ind): #IF IND1==IND THEN IT IS NOT A REQUIRED VALUE(i.e VALUE IS DEFINED AS IT WILL BE BETWEEN SPACES

continue #WE ARE FINDING TWO SPACES IF THE LOCATION OF INDEXS IS SIDE BY SIDE THEN THERE WILL BE NO VALUE

values.append(x[ind1:ind]) #IF THERE IS A VALUE ADD IT TO VALUES LIST

if(len(values)>0): #IF VALUES ARE TRAVERSED CORRECTLY THEN CALCULATE ESI

radius = float(values[1]) #CHANGING STRING VALUE TO FLOAT.

density = float(values[2]) #ACCORDING TO THE FILE PATTERN YOU HAVE GIVEN I AM ONLY CONSIDERING THE 4 PROPERITES ABOVE MENTIONED

escape_velocity = float(values[4])

surf_temp = float(values[6])

rad_esi = calculate_esi(radius,w_i[0],ref_prop[0],n) #CALLING calculate_esi() FUNCTION for each property

den_esi = calculate_esi(density,w_i[1],ref_prop[1],n)

esc_vel_esi = calculate_esi(escape_velocity,w_i[2],ref_prop[2],n)

sur_temp_esi = calculate_esi(surf_temp,w_i[3],ref_prop[3],n)

rad_list.append(rad_esi) #APPENDING EACH PROPERTY ESI TO RESPECTED LIST

dens_list.append(den_esi)

esc_vel_list.append(esc_vel_esi)

surf_temp_list.append(sur_temp_esi)

total_esi = rad_esi*den_esi*esc_vel_esi*sur_temp_esi #product of each property's ESI

planet_esi.append(total_esi)

x=f.readline()

f.close()

print "======================Most Similarity According to Radius======================"

print max(rad_list)

print "======================Most Similarity According to Density======================"

print max(dens_list)

print "======================Most Similarity According to Escape Velocity=============="

print max(esc_vel_list)

print "======================Most Similarity According to Surface Tempratur============"

print max(surf_temp_list)

print "======================Most Similarity According to Planet total ESI============="

print max(planet_esi)

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