Question

the second picture is the content of the file bf.dat

the language is python

Your task is to wite a function parse scenario(filenne) that parses a file with the structure described below, validates the contents and retums either a dicdionary containine all values required to specify a model scenarlo if the contents are valid, or None if any of the mntents are inwalid. The structure of the fle is as follows: . an inteper specifying the wicth and heih of the square landscape erid * M lines nacn containing M integrVAIes separated by con mas drf ning the initial url load at the landscapr a visual representation af the M hy ง grid lines, each containine M integer values separated by commas, defining the height of the lancscape aain, a visual representation of the M by M grid a for this scnarin n intrger specifying the igniticn threshald . a one or two character strine specilying the wind direction for Lhis scenario * an·ar mne lines, cach cnrtaining the . cnarn nates row number, cDhimn rnimber afa 쏘ll which is burning at thr start af the simulation For example, the file 'bf8.dat 2,2 1,2 speciñes a 2 by 2 landscape: · there is an initial tuel load of 2 in three of the four cells, with a ruel load o10 n hecell clo * thr height of all cells in the fist column J。is 1 w hile the height of all cells in the sernnd cnlumn thr ignition threshold is 1 . a wind is bloing from the Ncrh 1 is 2 in the landscape singes up trward the Fast- the top letcls buming at the start of the simulatioin You may assume that the input files are well-formed, but your function should ensure that: he di Lhe grid are a pesitive inleger; . the inition threshold is a positive integer not gree than eiht: the wind direci is vlid; and . the coordinates of the burning cells are (a located on the landscape, andb have non- zero initial fuel load. If all values are validd. your function should return a dictionary with keyvalue pairs as follows: .f grid:a list of lists fdiesiois M by i) . h grid: a list of lists lof dimensions byi] integer i-threshold: an Mdirectiorc a strine burn eeds: a list af tuples If any values are invalid. your function should return Hone For example: parsa scenario'bfe-dat' 'f grid' [2, 2], [, 2]1, hgrid11, 21, I1, 211, 'i-threshold' ; 1, direction'! 'N' 'burn-seeds'; [(6, 91) parsscario'b.dat ('f-grid': [[1: 1], [g, 2]: te, 1]], 2, 1, o, ithreshald': 1, M.direction' 'N burneds 1, 1 program.py bf.data bf0.dat 2 1,2,1 3 0,1,2 4 0,0,1 5 1,1,1 6 2,1,2 7 3,2,2 10 1,1

Answer 1

If you have any doubts, please give me comment...

1 def parse_scenario(filename): 2 3 try: "r") open(filename , fp = nint (fp.readline().strip)) d['f grid'] [ for i in range(n): 6 d['f grid'J.append (list (map(int, fp.readline().strip().split(",")))) 8 d['h grid'] [ for i in range(n): 10 fp.readline().strip().split(", ")))) d[ 'h_grid'].append (list (map(int, d('i-threshold'] înt(fp . readline( ). strip()) dI'w direction'] fp.readline().strip) at, burn-seeds'] [] for i in range(d['i_threshold']): 12 13 14 15 16 17 18 19 20 print(parse_scenario("bfo.dat") 21 print(parse_scenario("bf.dat") fp.readline().strip().split(", ")))) d[ 'burn_seeds'J.append (tuple(map(int, return d except: return None

Code:

def parse_scenario(filename):

try:

fp = open(filename, "r")

d = {}

n = int(fp.readline().strip())

d['f_grid'] = []

for i in range(n):

d['f_grid'].append(list(map(int, fp.readline().strip().split(","))))

d['h_grid'] = []

for i in range(n):

d['h_grid'].append(list(map(int, fp.readline().strip().split(","))))

d['i_threshold'] = int(fp.readline().strip())

d['w_direction'] = fp.readline().strip()

d['burn_seeds'] = []

for i in range(d['i_threshold']):

d['burn_seeds'].append(tuple(map(int, fp.readline().strip().split(","))))

return d

except:

return None

print(parse_scenario("bf0.dat"))

print(parse_scenario("bf.dat"))