python scrypt for micro serial acquisition adc

script.py

import serial
ser=serial.Serial()
ser.baudrate=9600
ser.port='COM10'
with open("dati_seriale.txt","w") as file:
    r=ser.read()
    while(r):
        file.write(r)
        r=ser.read()




with open("dati_seriale.txt","r") as file:
    line=file.readline()
    cnt=1
    vrefint_cal=0
    vrefint_data=0
    vec=[]
    m=0
    i=0
    while line:
        if line!='\n':
            a=int(line)
            b=3.3*a/(4095)
            m+=b
            if(i==1):
                vec.append(m/2.0)
                m=0
                i=0
            else:
                i+=1
            
            print("Line{}: {}".format(line.strip(),b))
            cnt+=1
        line=file.readline()
        
with open("dati_seriale_convertiti.txt","w") as file:
    for i in range(3,len(vec)):
        file.write("{}, {}\n".format(i,vec[i]))

import matplotlib.pyplot as plt
import csv
x=[]
y=[]
with open("dati_seriale_convertiti.txt","r") as csvfile:
     plots = csv.reader(csvfile,delimiter=',')
     for row in plots:
             x.append(float(row[0]))
             y.append(float(row[1]))
             print("{}, {}".format(row[0],row[1]))
plt.plot(x,y)
plt.show()