Code optimization.py

import pandas as pd
print("One thing is noticed before starting of the program is that it is compulsory to exist an 'input.csv' file\n")
print("The formate of 'input.csv' file is that it should contains a 'left' header and a 'right' header with values indicate left and right respectively.\n")
print("Here we can't consider 'equal(=)' sign because it doesn't effect a bit of code with or without its presence.\n")
print("This program is case sensitive this means that 'd*10' and '10*d' is treated in different way\n They are not same. ")
print("The formate and input file for this program is as below..")
a=pd.read_csv("input.csv")
c=a.shape
print(a)
b=[]
for i in range(c[0]):
    for j in range(i+1,c[0]):
        if(a['right'][i]==a['right'][j]):
            for d in range(c[0]):
                b=b+[(len(a['right'][d]))]
                for z in range(b[d]):
                    if(a['right'][d][z]==a['left'][j]):
                        x=list(a['right'][d])
                        x[z]=a['left'][i]
                        l=''.join(x)
                        a['right'][d]=a['right'][d].replace(a['left'][j],a['left'][i])
            a['left'][j]=a['left'][i]
df=pd.DataFrame(a)
df.to_csv('output1.csv',index=False)
p=pd.read_csv("output1.csv")
print("After checking and putting the value of common exepression ")
print(p)
i=0
j=i+1
while(j<c[0]):
    if(p['right'][i]==p['right'][j]):
        if(p['left'][i]==p['left'][j]):
            p.drop([j],axis=0,inplace=True)
            i+=2
            j+=1
        else:
            i+=1
    j+=1
    if(j==c[0]):
        i=i+1
        j=i+1
    if(i==c[0]):
        j=c[0]
print("After elemenating the common expression")
df=pd.DataFrame(p)
df.to_csv('output1.csv',index=False)
p=pd.read_csv("output1.csv")
print(p)
c=p.shape
#print(c)
count=0
i=0
j=0
h=1
while(j<c[0] and i<c[0]):
    b=[]
    b=b+[(len(p['right'][j]))]
    for z in range(b[0]):
        #print(z,j,i)
        if(p['right'][j][z]==p['left'][i]):
            count=1
    j+=1
    #print(j)
    #print(c[0])
    if(j==c[0]):
        #print(count)
        if(count!=1):
            p.drop([i],axis=0,inplace=True)
            df=pd.DataFrame(p)
            df.to_csv('output1.csv',index=False)
            p=pd.read_csv("output1.csv")
            3#print(p)
            c=p.shape
            print(c)
        i+=1
        j=0
print("After dead code elimination")
print(p)
df=pd.DataFrame(p)
df.to_csv('output1.csv',index=False)
p=pd.read_csv("output1.csv")
c=p.shape
print("The final optimized code is....")
for i in range(c[0]):
    print(str(p['left'][i])+"="+str(p['right'][i]))