Error executing program: ZeroDivisionError: decision by zero

import numpy as np
import sys
import re
import time
acid=[ ]
score1 = [ ]
e=[ ]
path="C: Users / Hirotaka Adachi / Desktop / profile /"
wr=open(path+"w.txt","w")
'''
defread_fasta(name):
    f = open(name, 'r')
    seq = ' '
    for line in f.readlines():
        ifline[0]!='>':
            seq+=line.strip()
    f.close()
    return seq
'''
###
#X = 'GGGGGUAAAAAAJJJJJJJJJBBB' #human
# Y = 'TGTGTGCTGTCACTC'
default(x_al,x_na):
    time.sleep(1)
    X = x_al
    X_name = x_na
    for acid1 in open(path+"write1.txt","r"):
        aci=re.sub("\n", "", acid1)
        ac=aci.split("\t")
        if X_name==str(ac[0]):
            acid.append(ac[2])
    print(acid)
    for YY in open(path+"ns8_keggID_sample_protain_ID.txt", "r"):
        YY1 = re.sub("\n", "", YY)
        YY2 = YY1.split("\t")
        Y_moto=YY2[0]
        # print(Y_moto)
        Y_name = YY2[1]
        Y = YY2 [2]
        if Y_moto==X_name:
            print(Y_name)
            N=len(X)
            M=len(Y)

            gap_penalty=-2

            H=np.empty(N+1, M+1), dtype='int16')
            L=np.zeros(N+1, M+1), dtype='int8')

            H[0,0] = 0
            for jin range (1, M+1):
                H[0,j] = H[0,j-1] + gap_penalty
                L[0,j] = 0

            for i in range (1, N+1):
                H[i,0] = H[i-1,0] + gap_penalty
                L[i,0] = 2

# Horizontal:0 Diagnostic:1 Vertical:2
            s=np.array([0,0,0], dtype='int')

            for i in range (1, N+1):
                for jin range (1, M+1):
                    s[0] = H[i,j-1] + gap_penalty

                    if X[i-1] == Y[j-1]:
                        score=+1
                    else:
                        score=-1
                    s[1] = H[i-1, j-1] + score

                    s[2] = H[i-1,j] + gap_penalty

                    H[i,j] = np.max(s)
                    L[i,j] = np.argmax(s)
            pairs = [ ]
            i = N
            j = M
            while i!=0 or j!=0:
                if L[i,j] == 0:
                    pairs.append(["-",Y[j-1]] )
                    j = j-1
                elif L[i,j] == 1:
                    pairs.append ([X[i-1], Y[j-1])] )
                    i = i-1
                    j = j-1
                else:
                    pairs.append([X[i-1], "-"])
                    i = i-1

            pairs.reverse()
            i = 1
            acid_s = 0
            acid_all = 0
            acid_p=len(acid)
            For pin pairs:
                ifp[0]!="-":
                    i=i+1
                    for acid_num in acid:
                        if str(i)==acid_num:
                                # print(p)
                            if p[0] == p[1]:
                                acid_s=acid_s+1
            ac_all = acid_s /acid_p
            ac_al=str(ac_all)
                # print(Y_name,ac_all)
            ac_a = [Y_name, ac_al]
            # print(ac_a)
            score1.append(ac_a)
'''
# print ('SCORE=', H[N, M])
For pin pairs:
    print(p[0], end='')
print()

For pin pairs:
    if p[0] == p[1]:
        print('|', end=')
    else:
        print('',end=')
print()

For pin pairs:
    print(p[1], end='')
print()
i = 0
For pin pairs:
    ifp[0]!="-":
        i=i+1
        if i == 12:
            print(p)
'''
if__name__=='__main__':
    wr.write("\t")
    for wwr in open(path+"honyurui.txt"):
        wwr1 = re.sub("\n", "", wwr)
        wr.write(wwr1+"\t")
        e.append(wwr1)
    wr.write("\n")
    for XX in open(path+"hito_tatejiku.txt", "r"):
        score1 = [ ]
        acid=[ ]
        XX1 = re.sub("\n", "", XX)
        XX2 = XX1.split("\t")
        XX_name = XX2[0]
        XX_aliment=XX2[1]
        print(XX_name)
        alimentt(XX_aliment, XX_name)
        print(score1)
        wr.write(XX_name+"\t")
        Foriiine:
            ii_s=-1
            for jjin score1:
                jj1 = jj[0].split(":")
                ifii==jj1[0]:
                    ii_s=jj[1]
            wr.write(str(ii_s)+"\t")
        wr.write("\n")