Input generator for the 1st problem of the Bioinfo Contest 2017, to be used for testing solutions. Write a lot of chemical reactions in the appropriate format. Useful parameters and file generated are indicated with comments.

random_input_gen.py

import random

total = random.randrange(200,400) # all chemicals will be in the range 1:total
init_count = random.randrange(40,80) # length of the 1st line
reaction_count = random.randrange(200,2000) # number of line of the input

l = []
for i in range(0, init_count):
    l.append(str(random.randrange(1, total)))
string = " ".join(l) + "\n"

for i in range(0, reaction_count):
    input_count = random.randrange(1, 50) # input and output length of the line
    output_count = random.randrange(1, 50)
    in_l = []
    out_l = []
    for j in range(0, input_count):
        in_l.append(str(random.randrange(1, total)))
    for j in range(0, output_count):
        out_l.append(str(random.randrange(1, total)))
    string += "+".join(in_l) + "->" + "+".join(out_l) +"\n"

with open("input_gen_rand.txt", "w") as out: # file name and location
    out.write(string)